Dynamics of a lava fountain revealed by geophysical, geochemical and thermal satellite measurements: The case of the 10 April 2011 Mt Etna eruption
|
|
- Antony Wilkinson
- 5 years ago
- Views:
Transcription
1 GEOPHYSICAL RESEARCH LETTERS, VOL. 38,, doi: /2011gl049637, 2011 Dynamics of a lava fountain revealed by geophysical, geochemical and thermal satellite measurements: The case of the 10 April 2011 Mt Etna eruption A. Bonaccorso, 1 T. Caltabiano, 1 G. Currenti, 1 C. Del Negro, 1 S. Gambino, 1 G. Ganci, 1 S. Giammanco, 1 F. Greco, 1 A. Pistorio, 1 G. Salerno, 1 S. Spampinato, 1 and E. Boschi 1 Received 13 September 2011; revised 10 November 2011; accepted 10 November 2011; published 22 December [1] Geophysical (tilt, seismic tremor and gravity signals), geochemical (crater SO 2 flux) and infrared satellite measurements are presented and discussed to track the temporal evolution of the lava fountain episode occurring at Mt Etna volcano on 10 April The multi-disciplinary approach provides insight into a gas-rich magma source trapped in a shallow storage zone inside the volcano edifice. This generated the fast ascending gas-magma dispersed flow feeding the lava fountain and causing the depressurization of a deeper magma storage. Satellite thermal data allowed estimation of the amount of erupted lava, which, summed to the tephra volume, yielded a total volume of erupted products of about m 3. Thanks to the daylight occurrence of this eruptive episode, the SO 2 emission rate was also estimated, showing a degassing cycle reaching a peak of 15,000 Mg d 1 with a mean daily value of 5,700 Mg d 1. The SO 2 data from the previous fountain episode on February to 10 April 2011, yielded a cumulative degassed magma volume of about m 3, indicating a ratio of roughly 10:1 between degassed and erupted volumes. This volumetric balance, differently from those previously estimated during different styles of volcanic activities with long-term (years) recharging periods and middle-term (weeks to months) effusive eruptions, points toward the predominant role played by the gas phase in generating and driving this lava fountain episode. Citation: Bonaccorso, A., et al. (2011), Dynamics of a lava fountain revealed by geophysical, geochemical and thermal satellite measurements: The case of the 10 April 2011 Mt Etna eruption, Geophys. Res. Lett., 38,, doi: / 2011GL Introduction [2] Within the range of types of activity at a basaltic volcano, lava fountains, also called fire fountains, are an intriguing eruptive phenomenon. They are powerful, continuous but normally short-lived (from less than one to a few hours) gas jets that emit lava fragments to heights extending tens to hundreds of meters [e.g., Wolff and Sumner, 2000]. These eruptive phenomena often occur at an advanced state of magma recharge and usually represent a prelude to bigger effusive eruptions [e.g., Parfitt et al., 1995]. To explain the mechanisms of explosive basaltic eruptions two different conceptual models have been proposed [Parfitt, 2004]. The 1 Osservatorio Etneo, Istituto Nazionale di Geofisica e Vulcanologia, Catania, Italy. Copyright 2011 by the American Geophysical Union /11/2011GL first model explains this activity as generated by the disruption of fast-rising bubbly melt. The second model, deriving from a combination of theoretical approaches and laboratory experiments [Jaupart and Vergniolle, 1988, 1989], considers a separate ascent of a bubble foam layer previously accumulated at depth (known as foam collapse model). During recent decades, spectacular lava fountains have often occurred also at Mt Etna during recharging phases preceding several flank eruptions [e.g., Alparone et al., 2003; Bonaccorso, 2006]. Such activity is accompanied by the formation of dispersal ash plumes and fall-out deposits, which often pose severe hazards to aviation and repeated temporary closures of the Catania international airport [e.g., Scollo et al., 2009; Bonaccorso et al., 2011b]. Several studies have been conducted using different monodisciplinary approaches, such as volcanic tremor analyses [Alparone et al., 2003], geochemical analyses of volcanic gases from remote sensing spectroscopy [Allard et al., 2005], tilt changes [Bonaccorso, 2006], acoustic records [Vergniolle and Ripepe, 2008], studies on fallout deposits, on compositional/textural features of the erupted product [Andronico and Corsaro, 2011] and on the rheological properties of magma [Giordano et al., 2010]. More recently, multi-disciplinary approaches have been undertaken at Mt Etna to better investigate lava fountaining phenomena. Aiuppa et al. [2010] used tremor analysis, crater gas composition and summit area deformation to infer a shallow magma storage volume at depth of km a.s.l., i.e., in the last 2 km below the base of the South-East Crater (SEC), as the source where lava fountain events are generated. Bonaccorso et al. [2011b] studied in detail the 10 May 2008 lava fountain at Mt Etna, which preceded by only three days the onset of the long-standing flank eruption starting on 13 May Petrological data from the erupted tephra together with a wide range of geophysical data recorded continuously during the eruption were taken into account. The lava fountain was modeled as a violent release of a bubble-rich magma layer previously trapped at the top of a shallow reservoir located between 0.5 and 1.5 km a.s.l. A new sequence of lava fountains started in 2011, with several episodes that occurred from SEC [internal reports at From 12 January to 09 July, five lava fountains episodes occurred with a near month time interval (12 January, 18 February, 10 April, 12 May, and 09 July). Our investigation focused on the 10 April event, because it was one of the strongest episodes in the 2011 eruptive sequence and it also occurred during daylight, thus allowing the ultra-violet spectrometer network (named FLAME) to retrieve the SO 2 flux from the eruptive crater. For the first 1of7
2 Figure 1. (a) Permanent multi-disciplinary stations used in this study. (b) Photo of the 10 April 2011 explosive activity taken from the eastern flank, view from East to West (courtesy of Héloïse Picot, time in the history of monitoring of Mt Etna, we considered the continuous geophysical signals (seismic tremor, gravity, tilt) in conjunction with the geochemical data on volcanic gases (SO 2 ) measured by terrestrial remote sensing and the thermal activity data acquired by satellite (SEVIRI sensor). 2. The 10 April 2011 Eruptive Episode [3] In 2011, eruptive activity resumed at Mt Etna after the end of the long-lasting flank eruption. Several paroxysmal events occurred from the SEC, one of the four summit craters of the volcano and the most active one in the last years. The 10 April event was well observed and monitored through the network of sensors set up by the Istituto Nazionale di Geofisica and Vulcanologia (INGV). Two days before an increase in strombolian activity started inside the SEC, and in the early afternoon of 9 April the intra-crater explosive activity was accompanied by the effusion of a significant lava flow that rapidly filled the inner part of the crater. In the late afternoon of the same day, lava started pouring from the crater to form a 1.5 km-long flow that advanced towards the SE. In the morning of 10 April, the intensity of explosions increased markedly and between 08:00 and 09:00 (all times are UT) it developed into a lava fountain. Between 09:15 and 09:30 the height of the lava fountain steadily reached over 200 m above the crater rim. It began producing a significant emission of ash and lapilli that rapidly formed an eruptive column that rose convectively about 2 km above the volcano summit. From 11:30 to 13:30 lava flows reached their maximum expansion and maximum length (about 2.5 km). Lava jets sometimes reached up to 300 m in height until decreasing visibly to a maximum height of 100 m after about 13:10, when the fountaining activity decreased rapidly. After 13:30 only mild discontinuous magma jets were observed, reaching only some tens of meters in height. The eruption ceased at 14:00, but marked ash fall (made up of both coarse and fine lava fragments) was reported from 14:00 until 17:00 over the SE flank of the volcano down to the Ionian Sea coast. 3. Geophysical Data 3.1. Tilt [4] The Mt Etna permanent tilt network consists of 13 biaxial electronic instruments, which are installed in shallow boreholes at about 3 m depth (AGI 722 model) or at m depth (AGI Lily model). They all have a resolution on the order of 0.1 microradians or less, which is mainly detectable during rapid tilt changes [Bonaccorso and Gambino, 1997]. The instruments have a radial component directed towards the central crater VOR and a tangential component oriented orthogonally. The sampling rate is usually once every 10 minutes. During the 10 April paroxysm (from 09:00 to 13:30), several tilt stations recorded significant variations. In particular, stations MSC, MDZ, MSP, CDV and CBD (Figure 1) showed changes of about mrad (Figure 2); the other stations measured less visible changes, in some cases masked by daily thermoelastic effects [Bonaccorso et al., 1999]. The most evident variations are visible on the radial components and indicate a general deflation of the edifice during the lava fountain. In Figure 2 radial tilt components recorded at CDV, MDZ, MSP and CBD signals are raw data. The MSC signal has been filtered from daily thermal noise using a linear correlation filter. The CBD signal is N40E oriented and shows a different pattern, which may be caused by a sliding effect of the eastern flank [Bonaccorso et al., 2011b]. This behavior is very similar to that observed during the 10 May 2008 paroxysm [Bonaccorso et al., 2011b], but in the 10 April case changes are smaller and detected clearly in fewer stations. These tilt changes have been recorded over a wide area (the detecting stations are at a distance of 6 8 km from the summit craters), implying that the depth of the deflation source is not very shallow. It is reasonable to suppose that a depressurizing source located at depth of 3 4 km b.s.l., as inferred by Bonaccorso et al. [2011b] for the 10 May 2008 episode, may also have acted for the 10 April episode Seismic Tremor [5] At Mt Etna seismic tremor is continuous in time and its close relationship with eruptive activity allows for tracking of the changes in the eruptive state of the volcano [e.g., Falsaperla et al., 2005; Alparone et al., 2003]. This can be particularly useful when visual observation or field survey are hindered by poor weather conditions. A permanent network of 32 digital broadband seismic stations, equipped with Nanometrics Trillium seismometers with a corner period of 40 s, is operating. We investigated the volcanic tremor amplitude (RMS) associated with the 10 April lava fountain 2of7
3 Figure 2. Overall multidisciplinary signals recorded during 10 April 2011 from 06:00 to 18:00 UT. The vertical dashed lines indicate the time interval wherein the lava fountain occurred. The grey area indicates the period when the ash cloud was clearly evident from satellite images. episode by analyzing the seismic signal recorded at the EBEL station (Figure 1), the closest one to the SEC. Figure 3 shows the temporal variation of the RMS tremor amplitude, calculated on 5-minute-long sliding windows in the frequency band Hz. After the end of the lava fountain of 18 February, volcanic tremor amplitude stayed, on average, at a low level (less than nm/s) with moderate fluctuations. Starting from 07:00 of 9 April, the amplitude progressively increased. In the late afternoon of the same day, the RMS values were about nm/s, and in the early morning of 10 April the tremor amplitude reached values of about nm/s (Figure 3). The similarity between the RMS trend with that detected for paroxysmal episodes occurring in the past [Alparone et al., 2003; Bonaccorso et al., 2011b] clearly suggested a new impending and strong phase of volcanic activity. Indeed, between 07:30 and 08:30 a further sharp increase occurred, marking the beginning of the paroxysmal phase of the tremor, which at 10:30 culminated in a relative maximum of about 10 5 nm/s. Such a maximum was shortly followed by a small decrease and then, between 11:25 and 12:25, by a phase in which the tremor amplitude reached the highest values (about nm/s) during this lava fountaining. Afterwards, as already observed in the other lava fountaining episodes of 2011, an abrupt drop of the RMS amplitude at 13:30 marked the end of the paroxysm. A few hours later, RMS was at low steady values, comparable with those recorded before the eruptive episode. Even the tremor source locations, calculated according to the method described by Di Grazia et al. [2006] showed a time pattern which resembled that observed for previous paroxysms [Bonaccorso et al., 2011b]. The tremor sources progressively shifted from a position located north-northeast of the summit area at depths from 0.5 to 1.5 km (a.s.l.), on the days immediately before the lava fountain, to new positions toward the southeast, and moved to shallower depths towards the SEC. On 9 April, the tremor source was located at shallower depth (above 1.5 km a.s.l. and below SEC). After the end of the 10 April eruption, tremor source location shifted back northward and deepened to reach its pre-eruptive depth ( km a.s.l.) Gravity [6] Two continuously recording gravity stations (SLN and BVD) on the southern flank of the volcano (at 1740 and 2920 m a.s.l., respectively) were operative during the 10 April fire fountain (Figure 1). These stations are equipped with LaCoste & Romberg spring gravimeters and acquire at one data per minute sampling rate. Figure 2 shows the raw gravimetric sequences, after removing the effects of Earth tide and instrumental drift. Both reduced temporal gravity series, from about 09:22 displayed rapid and marked changes that are time-correlated with the most intense phases of lava fountaining. Gravity variations reached an amplitude of about 200 mgal at BVD and about 35 mgal at SLN. Subsequently, at the end of the paroxysmal event, both signals returned to their original levels. As already observed and inferred for the May 2008 episode [Bonaccorso et al., 2011b], these gravity variations can be mostly ascribed to the fast ascent of a very low-density mixture of gas and dispersed magma clots (dispersed flow) within the conduit generated by the collapse of a foam layer at the top of the magmatic source. As the gas-magma mixture ascends, it replaces a more degassed and denser magma that was already 3of7
4 Figure 3. Temporal variation of RMS tremor amplitude and radiative power computed by HOTSAT for SEVIRI data, during 9 11 April The vertical dashed lines indicate the time interval wherein the lava fountain occurred. residing inside the conduit, thus causing a localized mass decrease that induced a negative gravity variation at BVD and a positive change at SLN. The signs and the amplitude ratio between the gravity changes at the two stations allows for constraining of the position and the size of the gravity source. To model the gravity changes we have to consider both the expansion of the bubble foam layer previously accumulated and the passage of the dispersed flow through the conduit. Following Bonaccorso et al. [2011b] we modelled the foam effect using a spherical source located at a height of about 1.7 km a.s.l., with a radius of 170 m, and the SEC conduit as a cylindrical-shaped body, assuming a radius of about 10 m, as inferred by Bonaccorso [2006], set at a height ranging between 1.9 and 2.9 km a.s.l. (i.e., from the top of the foam source). A density variation of 2.2 g/cm 3 from the resident magma (2.7 g/cm 3 ) to the gas-magma dispersed flow (0.5 g/cm 3 ) results in a magma with a 75% vesicularity [Bonaccorso et al., 2011b]. The model matches the pattern of observations quite well and shows that at BVD the main contribution is given by the foam source rather than by the conduit, whereas at SLN the contribution of the foam is negligible, since it is at the same altitude of the station, and the small positive change arises from the density variation within the conduit. 4. Gas Geochemistry: SO 2 Flux Remote Sensing [7] At Mt Etna, SO 2 flux is measured during the daylight hours by the FLAME (FLux Automatic MEasurement) scanning ultraviolet spectrometer network [Salerno et al., 2009a, 2009b]. Three out of nine stations of FLAME were used in this study (Figure 1). During daylight, each device scans the sky intersecting the plume at a distance of 14 km from the summit craters [Salerno et al., 2009a]. FLAME automatically compute in real-time the SO 2 flux, whose uncertainty ranges between 22 and +36% [Salerno et al., 2009b]. Between 8 and 9 April 2011 and from 07:20 to 09:00 of 10 April, the SO 2 flux was characterized by low steady values around the mean flux of 1500 Mega gram per day (Mg d 1, mean standard deviation, 1s = 500). This behavior abruptly changed after 09:00, showing an increase in the SO 2 emission rates that peaked at 10:54 reaching the maximum value of 15,500 Mg d -1 (Figure 2). This was followed by a general decreasing trend punctuated by two sharp drops in the emission rates at 11:23 and 11:47 (10300 and 5500 Mg d 1, respectively). Overall, during the eight hours of observation, the SO 2 flux showed a degassing cycle encompassed between minima of 1340 (09:05) and 2200 Mg d 1 (15:35), with the mean daily emission rate of 5700 Mg d 1 (1s = 3600). Using the SO 2 measurements, we calculated the volume of cumulative degassed magma (D m )in the period between the two lava fountaining episodes of February and 8 10 April. We chose this temporal window since we assumed that the April episode was supplied by magma that had accumulated in the volcano shallow feeder system since the end of the previous February lava fountaining event. Following Allard [1997], the total volume of D m was calculated using mean crystal fraction of 30% and mean original sulphur content for Etnean magma of 0.3 wt% [e.g., Spilliaert et al., 2006]. This yielded a cumulative magma volume of m 3, of which 4% had degassed over the three days of the eruptive activity. The error on D m is from 22% to 36% since it derives from the SO 2 flux measurement. Errors associated with the parameters used for estimating D m have such a small error compared to the uncertainty in SO 2 flux, having no significant influence on the error of D m. 5. Satellite Thermal Data [8] Data acquired by SEVIRI sensor (spatial resolution of 3km 2 at Nadir, temporal resolution of 15 minutes, downloaded from EUMETSAT, onboard the meteorological satellite MSG-2, were processed by the HOTSAT system to monitor high-temperature surface anomalies over Mt Etna [Ganci et al., 2011]. During the night between 9 and 10 April, we measured an almost continuous thermal activity, with the first hotspot detected on 9 April at 19:27 (see Figure S1 in the auxiliary material). 1 After this, we registered an increase in the heat flux, with a peak of about 6.5 GW on 10 April at 10:12. During 10 April, 1 Auxiliary materials are available in the HTML. doi: / 2011GL of7
5 from 10:27 until 16:42, discontinuous ash emissions occurred, as shown in Figure S1. The presence of ash could have covered the emitted lava and, hence, hidden the thermal anomalies, thus leading to an underestimation of the radiative power. At 17:00 a new peak of 6.2 GW occurred after the intensive ash emission stopped. From 17:12 we observed a gradual decrease of the thermal activity and the last hotspot was detected on 11 April at 5:12. We converted the total thermal flux estimated from SEVIRI thermal infrared images to time average discharge rate (TADR), following Harris et al. [1999]. Since the conversion from heat flux to volume flux depends on many lava parameters (such as density, specific heat capacity, eruption temperature, etc.) and it has to be determined as a function of flow conditions [Harris et al., 2010], we defined a range of variability for each parameter adopting the extreme values found by Harris et al. [2007], which proved reasonable in calibrating satellite thermal data for Etna lavas [e.g., Vicari et al., 2011]. The peak values of TADR were estimated on 10 April, before and after the ash plume emission, at 10:12 and at 17:00, and ranged between 7 and 20 m 3 s 1. By integrating separately minimum and maximum estimates of TADR, we computed two cumulative curves of the erupted lava volume. Over the entire period of thermal emission, we estimated erupted lava volumes in the range between 0.25 and m 3.Itis worth noting that TADR does not reflect the instantaneous at-vent effusion rate, but it depends on the previous volume flux, integrated over some period prior to satellite overpass and that this computation is affected by uncertainties and assumptions, such as ash cloud attenuation and/or inability to distinguish between lava draining channels and cooling phenomena [Vicari et al., 2011]. To reduce the ash cloud attenuation effect, we discarded ash covered images and linearly interpolated the peak values between 10:12 and at 17:00. The new lava volumes thus estimated range between 0.35 and m 3. Assuming that lava stopped flowing around 18:30 on 10 April (at the end of the period of more intense thermal activity), the final satellite-derived volume of lava is estimated in the range m 3 (i.e., a mean value of m 3 ). The uncertainty in satellite-derived effusion rate estimates is quite large, up to about 50%, and mainly arises from the lack of constraints on the lava parameters used to convert thermal flux into lava effusion rate. However, the uncertainty is comparable to the error in field-based effusion rate measurements [e.g., Harris et al., 2007]. 6. Discussion and Conclusions [9] In agreement with previous recent observations [Bonaccorso et al., 2011b], continuous geophysical signals (tilt, seismic tremor, gravity) recorded during this investigation confirm interesting aspects of lava fountain mechanisms. In particular, the ground tilt detected on the flanks of the volcano largely suggests deflation of a source located at 3 4 km b.s.l. (i.e., deeper than the shallower one related to seismic tremor, which is located at depth between 0.5 and 1.5 km a.s.l.). This finding again confirms the existence of an intermediate magma storage volume, consistent with the pressuring/depressuring storage volumes modeled since 1990 s [e.g., Bonaccorso et al., 2006; Bonforte et al., 2008]. During the recharge phase of 2010, the volcanic tremor was located stably within a crustal volume contained between 0.5 and 1.5 km a.s.l., almost in the same position as that of the recharging phase preceding the eruption [Bonaccorso et al., 2011a]. The top portion of this volume coincides with the location of the gas bubble layer inferred by Allard et al. [2005] from volcanic gas analysis carried out during a lava fountain episode in June During 9 10 April, the increasing volcanic tremor signals marked very well the preparatory phase of the lava fountain (Figure 3). The gravity changes fit with the effects produced by a volume-source where a low density mass moved from the same top portion (about 1.7 km a.s.l.) through a conduit towards the surface at about 2.9 km a.s.l., where the SEC is located. Therefore, as a first conclusion, the different geophysical signals support the idea that a gas rich magma could be trapped in a shallow storage zone (indicated by the top portion of the tremor volume). Such magma would generate the fast ascending gas-magma dispersed flow that fed the lava fountain when an overpressure threshold was exceeded and caused a depressurization in the deeper magma storage volume at depth of 3 4 km b.s.l. SEVIRI data help build a detailed chronology of the thermal activity during the paroxysmal event. HOTSAT calculations detected the first thermal anomalies about twelve hours before the beginning of the lava fountain (9 April, 19:30), when lava outpouring was enough to be detectable from the satellite sensor. Considering that the sluggish flow continued through the evening of 10 April, we estimated the satellite-derived dense rock equivalent (DRE) volume ranging from 0.3 to m 3. This value refers to the lava emission and it does not include the volume of tephra ejected in the same period. We estimated the balance between degassed and erupted magma (D m and E m, respectively) based both on the SO 2 flux measurements and on the thermal activity recorded by satellite. The calculated D m value during the time between the two lava fountaining episodes of February and April 2011 was m 3, while the 10 April lava fountaining E m, derived from satellite thermal data, yielded a mean volume of m 3. Based on the average value from literature, we assumed that the estimated tephra volume is about 50% of the effusive volume [Behncke et al., 2006; Allard et al., 2006; Calvari et al., 2011]. Therefore, the total erupted volume is m 3, which yields a volumetric ratio D m /E m of about 10:1. This ratio is significantly greater than previous estimates [Allard, 1997; Allard et al., 2006]. Allard [1997] and Allard et al. [2006] argued that over a broad time-scale, i.e., between 1975 and 1995 and between 2001 and 2006, only about one fourth of the total degassed magma volume was eventually erupted, with the majority of magma remaining confined at depth within the crust [e.g., Francis et al., 1993; Caracausi et al., 2003]. A similar 4:1 ratio between stored and erupted magma was also observed from gravimetric data [Bonaccorso et al., 2011c]. Indeed, during the period , the observed positive gravity changes were associated with a magma recharge through intrusion of an estimated magma volume of m 3, of which only m 3 was erupted during the following 2001 and eruptions. [10] The general mechanism to explain the long-term volumetric imbalance between D m and E m and, hence, the excess degassing, at active volcanoes tends to envision magma recycling within the volcano s shallow feeder system. It suggests that degassed magma would sink down in the conduit, being replaced by fresh undegassed and 5of7
6 ascending magma [e.g., Oppenheimer and Francis, 1997; Stevenson and Blake, 1998; Harris et al., 1999]. This model has also been proposed at Mt Etna by Allard [1997]. However, such volumetric balances have normally been estimated for long-term (several years) volcanic degassing. Recently, Steffke et al. [2011] investigated effusive flank eruptions occurring at Mt Etna between 2002 and They found that over short-time scales (weeks to months), the volumetric balance between D m and E m has a ratio close to 1 during the effusive phase of the eruption, and during the and the 2006 eruptions. The significant imbalance between influx of degassing magma and efflux of degassed lava (D m /E m 10) observed in the case of the 10 April eruption, therefore, highlights that this lava fountaining episode was driven by a predominant gas phase (at least 70% [Cashman et al., 2000]) previously decoupled from melt and accumulated at the top of a shallow magma storage at about 2 km a.s.l. [Vergniolle and Ripepe, 2008; Allard et al., 2005; Bonaccorso et al., 2011b], hence supporting the mechanism of foam collapse proposed by Jaupart and Vergniolle [1989]. [11] Acknowledgments. Thanks are due to the personnel of INGV- Catania employed in the volcano monitoring of the Mt Etna for making the multi-disciplinary data available. In particular, GS, TC and SG acknowledge F. Mure and D. Randazzo for their technical assistance in the FLAME network. We are grateful to EUMETSAT for SEVIRI data. We thank S. Conway for revising the English language of this paper. We thank an anonymous referee for the constructive comments and the AE R. Harris for the helpful assistance. [12] The Editor wishes to thank an anonymous reviewer for their assistance evaluating this paper. References Aiuppa, A., et al. (2010), Patterns in the recent activity of Mount Etna volcano investigated by integrated geophysical and geochemical observations, Geochem. Geophys. Geosyst., 11, Q09008, doi: /2010gc Allard, P. (1997), Endogenous magma degassing and storage at Mount Etna, Geophys. Res. Lett., 24, , doi: /97gl Allard, P., M. Burton, and F. Murè (2005), Spectroscopic evidence for lava fountain driven by previously accumulated magmatic gas, Nature, 433, , doi: /nature Allard, P., B. Behncke, S. D Amico, M. Neri, and S. Gambino (2006), Mount Etna : Anatomy of an evolving eruptive cycle, Earth Sci. Rev., 78, , doi: /j.earscirev Alparone, S., D. Andronico, L. Lodato, and T. Sgroi (2003), Relationship between tremor and volcanic activity during the Southeast Crater eruption on Mount Etna in early 2000, J. Geophys. Res., 108(B5), 2241, doi: /2002jb Andronico, D., and R. A. Corsaro (2011), Lava fountains during the episodic eruption of South-East Crater (Mt. Etna), 2000: Insights into magma-gas dynamics within the shallow volcano plumbing system, Bull. Volcanol., 73, , doi: /s y. Behncke, B., M. Neri, E. Pecora, and V. Zanon (2006), The exceptional activity and growth of the Southeast Crater, Mount Etna (Italy), between 1996 and 2001, Bull. Volcanol., 69, , doi: /s x. Bonaccorso, A. (2006), Explosive activity at Mt. Etna summit craters and source modelling by using high precision continuous tilt, J. Volcanol. Geotherm. Res., 158, , doi: /j.jvolgeores Bonaccorso, A., and S. Gambino (1997), Impulsive tilt variations on Mount Etna ( ), Tectonophysics, 270, , doi: /s (96) Bonaccorso, A., G. Falzone, and S. Gambino (1999), An investigation into shallow borehole tiltmeters, Geophys. Res. Lett., 26(11), , doi: /1999gl Bonaccorso, A., A. Bonforte, F. Guglielmino, M. Palano, and G. Puglisi (2006), Composite ground deformation pattern forerunning the Mount Etna eruption, J. Geophys. Res., 111, B12207, doi: / 2005JB Bonaccorso, A., A. Bonforte, S. Calvari, C. Del Negro, G. Di Grazia, G. Ganci, M. Neri, A. Vicari, and E. Boschi (2011a), The initial phases of the Mt. Etna eruption: A multi-disciplinary approach for hazard assessment, J. Geophys. Res., 116, B03203, doi: / 2010JB Bonaccorso, A., A. Cannata, R. A. Corsaro, G. Di Grazia, S. Gambino, F. Greco, L. Miraglia, and A. Pistorio (2011b), Multi-disciplinary investigation on a lava fountain preceding a flank eruption: The 10 May 2008 Etna case, Geochem. Geophys. Geosyst., 12, Q07009, doi: / 2010GC Bonaccorso, A., A. Bonforte, G. Currenti, C. Del Negro, A. Di Stefano, and F. Greco (2011c), Magma storage, eruptive activity and flank instability: Inferences from ground deformation and gravity changes during the recharging of Mt. Etna volcano, J. Volcanol. Geotherm. Res., 200, , doi: /j.jvolgeores Bonforte, A., A. Bonaccorso, F. Guglielmino, M. Palano, and G. Puglisi (2008), Feeding system and magma storage beneath Mt. Etna as revealed by recent inflation/deflation cycles, J. Geophys. Res., 113, B05406, doi: /2007jb Calvari, S., G. G. Salerno, L. Spampinato, M. Gouhier, A. La Spina, E. Pecora, A. J. L. Harris, P. Labazuy, E. Biale, and E. Boschi (2011), An unloading foam model to constrain Etna s January 2011 lava fountaining episode, J. Geophys. Res., 116, B11207, doi: / 2011JB Caracausi, A., F. Italiano, A. Paonita, A. Rizzo, and P. M. Nuccio (2003), Evidence of deep magma degassing and ascent by geochemistry of peripheral gas emissions at Mount Etna (Italy): Assessment of the magmatic reservoir pressure, J. Geophys. Res., 108(B10), 2463, doi: / 2002JB Cashman, K. V., B. Sturtevant, P. Papale, and O. Navon (2000), Magmatic fragmentation, in Encyclopedia of Volcanoes, edited by H. Sigurdsson et al., pp , Academic, San Diego, Calif. Di Grazia, G., S. Falsaperla, and H. Langer (2006), Volcanic tremor location during the 2004 Mount Etna lava effusion, Geophys. Res. Lett., 33, L04304, doi: /2005gl Falsaperla, S., S. Alparone, S. D Amico, G. Di Grazia, F. Ferrari, H. Langer, T. Sgroi, and S. Spampinato (2005), Volcanic tremor at Mt. Etna, Italy, preceding and accompanying the eruption of July August, 2001, Pure Appl. Geophys., 162, , doi: /s y. Francis, P., C. Oppenheimer, and D. Stevenson (1993), Endogenous growth of persistently active volcanoes, Nature, 366, , doi: / a0. Ganci, G., A. Vicari, L. Fortuna, and C. Del Negro (2011), The HOTSAT volcano monitoring system based on a combined use of SEVIRI and MODIS multispectral data, Ann. Geophys., doi: /ag-5338, in press. Giordano, D., M. Polacci, P. Papale, and L. Caricchi (2010), Rheological control on the dynamics of explosive activity in the 2000 summit eruption of Mt. Etna, Solid Earth, 1, 61 69, doi: /se Harris, A. J. L., L. P. Flynn, D. A. Rothery, C. Oppenheimer, and S. B. Sherman (1999), Mass flux measurements at active lava lakes: Implications for magma recycling, J. Geophys. Res., 104, , doi: / 98JB Harris, A. J. L., J. Dehn, and S. Calvari (2007), Lava effusion rate definition and measurement: A review, Bull. Volcanol., 70, 1 22, doi: / s y. Harris, A. J. L., M. Favalli, A. Steffke, A. Fornaciai, and E. Boschi (2010), A relation between lava discharge rate, thermal insulation, and flow area set using lidar data, Geophys. Res. Lett., 37, L20308, doi: / 2010GL Jaupart, C., and S. Vergniolle (1989), The generation and collapse of foam layer at the roof of a basaltic magma chamber, J. Fluid Mech., 203, , doi: /s Jaupart, C., and S. Vergniolle (1988), Laboratory models of Hawaiian and Strombolian eruptions, Nature, 331, 58 60, doi: /331058a0. Oppenheimer, C., and P. Francis (1997), Remote sensing of heat, lava and fumarole emissions from Erta Ale volcano, Ethiopia, Int. J. Remote Sens., 18, , doi: / Parfitt, E. A. (2004), A discussion of the mechanisms of explosive basaltic eruptions, J. Volcanol. Geotherm. Res., 134, , doi: /j. jvolgeores Parfitt, E. A., L. Wilson, and C. A. Neal (1995), Factors influencing the height of Hawaiian lava fountains: Implications for the use of lava fountain height as an indicator of magma gas content, Bull. Volcanol., 57, , doi: /bf Salerno, G. G., M. R. Burton, C. Oppenheimer, T. Caltabiano, V. I. Tsanev, and N. Bruno (2009a), Novel retrieval of volcanic SO 2 abundance from ultraviolet spectra, J. Volcanol. Geotherm. Res., 181, , doi: /j.jvolgeores Salerno, G. G., M. R. Burton, C. Oppenheimer, T. Caltabiano, D. Randazzo, N. Bruno, and V. Longo (2009b), Three-years of SO 2 flux measurements of Mt. Etna using an automated UV scanner array: Comparison with conventional traverses and uncertainties in flux retrieval, J. Volcanol. Geotherm. Res., 183, 76 83, doi: /j.jvolgeores of7
7 Scollo, S., M. Prestifilippo, G. Spata, M. D Agostino, and M. Coltelli (2009), Monitoring and forecasting Etna volcanic plumes, Nat. Hazards Earth Syst. Sci., 9, , doi: /nhess Spilliaert, N., P. Allard, N. Métrich, and A. V. Sobolev (2006), Melt inclusion record of the conditions of ascent, degassing, and extrusion of volatile-rich alkali basalt during the powerful 2002 flank eruption of Mount Etna (Italy), J. Geophys. Res., 111, B04203, doi: /2005jb Steffke, A. M., A. J. L. Harris, M. Burton, T. Caltabiano, and G. G. Salerno (2011), Coupled use of COSPEC and satellite measurements to define the volumetric balance during effusive eruptions at Mt. Etna, Italy, J. Volcanol. Geotherm.Res., 205, 47 53, doi: /j.jvolgeores Stevenson, D. S., and S. Blake (1998), Modelling the dynamics and thermodynamics of volcanic degassing, Bull. Volcanol., 60, , doi: / s Vergniolle, S., and M. Ripepe (2008), From Strombolian explosions to fire fountains at Etna Volcano (Italy): What do we learn from acoustic measurements?, in Fluid Motions in Volcanic Conduits: A Source of Seismic and Acoustic Signals, edited by S. J. Lane and J. S. Gilbert, Geol. Soc. Spec. Publ., 307, Vicari, A., G. Ganci, B. Behncke, A. Cappello, M. Neri, and C. Del Negro (2011), Near-real-time forecasting of lava flow hazards during the January 2011 Etna eruption, Geophys. Res. Lett., 38, L13317, doi: /2011gl Wolff, J. A., and J. M. Sumner (2000), Lava fountains and their products, in Encyclopedia of Volcanoes, edited by H. Sigurdsson et al., pp , Academic, San Diego, Calif. A. Bonaccorso, E. Boschi, T. Caltabiano, G. Currenti, C. Del Negro, S. Gambino, G. Ganci, S. Giammanco, F. Greco, A. Pistorio, G. Salerno, and S. Spampinato, Osservatorio Etneo, Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania, Piazza Roma 2, I Catania, Italy. (bonaccorso@ct.ingv.it) 7of7
Major effusive eruptions and recent lava fountains: Balance between expected and erupted magma volumes at Etna volcano
GEOPHYSICAL RESEARCH LETTERS, VOL. 40, 6069 6073, doi:10.1002/2013gl058291, 2013 Major effusive eruptions and recent lava fountains: Balance between expected and erupted magma volumes at Etna volcano A.
More informationIntroduction. The output temperature of Fumarole fluids is strongly related to the upward
Heat flux monitoring of steam heated grounds on two active volcanoes I.S. Diliberto, E. Gagliano Candela, M. Longo Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Italy Introduction.
More informationCoupled use of COSPEC and satellite measurements to define the volumetric balance during effusive eruptions at Etna, Italy
Accepted Manuscript Coupled use of COSPEC and satellite measurements to define the volumetric balance during effusive eruptions at Etna, Italy Andrea M. Steffke, Andrew J.L. Harris, Mike Burton, Tommaso
More informationDipartimento di Scienze Geologiche, Palazzo delle Scienze, Corso Italia 55, I Catania, Italy
Small scale rifting during paroxysmal eruptive episodes at the South East Crater of Mount Etna (Sicily) Marco Fulle & Boris Behncke Osservatorio Astronomico, Via Tiepolo 11, I 34131 Trieste, Italy Dipartimento
More informationApplication of differential SAR interferometry for studying eruptive event of 22 July 1998 at Mt. Etna. Abstract
Application of differential SAR interferometry for studying eruptive event of 22 July 1998 at Mt. Etna Coltelli M. 1, Puglisi G. 1, Guglielmino F. 1, Palano M. 2 1 Istituto Nazionale di Geofisica e Vulcanologia,
More informationDegassing processes and recent activity at Volcán de Colima. Universidad de Colima, Mexico Corresponding author
Degassing processes and recent activity at Volcán de Colima Nick Varley * & Gabriel Reyes Dávila Universidad de Colima, Mexico Corresponding author email: nick@ucol.mx Volcán de Colima is currently in
More informationCharacterization of the response of spring-based relative gravimeters during paroxysmal eruptions at Etna volcano
Greco et al. Earth, Planets and Space 2014, 66:44 FULL PAPER Open Access Characterization of the response of spring-based relative gravimeters during paroxysmal eruptions at Etna volcano Filippo Greco
More informationMethodological and experimental approaches to evaluate the volcanic activity by high precision microgravity measurements
Methodological and experimental approaches to evaluate the volcanic activity by high precision microgravity measurements International Doctoral Research Course for Ingegneria Elettronica, Automatica e
More informationLinked frequency and intensity of persistent volcanic activity at Stromboli (Italy)
GEOPHYSICAL RESEARCH LETTERS, VOL. 40, 3384 3388, doi:10.1002/grl.50652, 2013 Linked frequency and intensity of persistent volcanic activity at Stromboli (Italy) J. Taddeucci, 1 D. M. Palladino, 2 G. Sottili,
More informationNear real-time monitoring of the April-May 2010 Eyjafjöll s ash cloud
Near real-time monitoring of the April-May 2010 Eyjafjöll s ash cloud Labazuy P. and the HotVolc Team Observatoire de Physique du Globe de Clermont-Ferrand, CNRS, Université Blaise Pascal 13th International
More information3D temporal evolution of displacements recorded on Mt. Etna from the 2007 to 2010 through the SISTEM method
3D temporal evolution of displacements recorded on Mt. Etna from the 2007 to 2010 through the SISTEM method Bonforte A., Guglielmino F.,, Puglisi G. INGV Istituto Nazionale di Gofisica e vulcanologia Osservatorio
More informationVolcanic SO 2 by UV-TIR satellite retrievals: validation by using ground-based network at Mt. Etna
; doi: 10.4401/ag-6641 Volcanic SO 2 by UV-TIR satellite retrievals: validation by using ground-based network at Mt. Etna CLAUDIA SPINETTI 1 *, GIUSEPPE GIOVANNI SALERNO 1, TOMMASO CALTABIANO 1, ELISA
More informationPatterns in the recent activity of Mount Etna volcano investigated by integrated geophysical and geochemical observations
Article Volume 11, Number 9 23 September 2010 Q09008, doi:10.1029/2010gc003168 ISSN: 1525 2027 Patterns in the recent 2007 2008 activity of Mount Etna volcano investigated by integrated geophysical and
More informationSupporting the response to the 2018 lower East Rift Zone and summit collapse at Kīlauea Volcano, Hawaiʻi
Hawaiʻi Supersite success story Supporting the response to the 2018 lower East Rift Zone and summit collapse at Kīlauea Volcano, Hawaiʻi Since 1983, Kīlauea Volcano, on the Island of Hawaiʻi, has actively
More informationThe changing face of Mount Etna s summit area documented with Lidar technology
GEOPHYSICAL RESEARCH LETTERS, VOL. 35, L09305, doi:10.1029/2008gl033740, 2008 The changing face of Mount Etna s summit area documented with Lidar technology M. Neri, 1 F. Mazzarini, 2 S. Tarquini, 2 M.
More informationVolcanic Plumes. JOHN WILEY & SONS Chichester New York Weinheim Brisbane Singapore Toronto
Volcanic Plumes R. S. J. SPARKS University of Bristol, UK M. I. BURSIK State University of New York, USA S. N. CAREY University of Rhode Island, USA J. S. GILBERT Lancaster University, UK L. S. GLAZE NASA/Goddard
More informationRecent activity. Current episode 12 years Transition between styles 4 periods of dome growth Since 2003, Vulcanian explosions (4 25 per day)
Recent activity Current episode 12 years Transition between styles 4 periods of dome growth Since 2003, Vulcanian explosions (4 25 per day) 02 December 09 Explosions originating from dome e.g. 10 Jan 2010
More informationA relation between lava discharge rate, thermal insulation, and flow area set using lidar data
GEOPHYSICAL RESEARCH LETTERS, VOL. 37,, doi:10.1029/2010gl044683, 2010 A relation between lava discharge rate, thermal insulation, and flow area set using lidar data Andrew Harris, 1 Massimiliano Favalli,
More informationThe role of bubble formation in volcanic eruption
The role of bubble formation in volcanic eruption Eyal Goldmann Division of Natural Sciences, El Camino College, Torrance, CA, 90506 Prepared for Geology 1 at El Camino College Fall 2009 1 1. Introduction
More informationNick Varley Universidad de Colima, Mexico
Nick Varley Universidad de Colima, Mexico nick@ucol.mx Remote sensing often is the first signal of a new eruption for remote volcanoes Fumarole direct temperature measurements Spring water temperatures
More informationABSOLUTE AND RELATIVE GRAVITY MEASUREMENTS AT ETNA VOLCANO (ITALY)
ABSOLUTE AND RELATIVE GRAVITY MEASUREMENTS AT ETNA VOLCANO (ITALY) F. Greco 1, G. Currenti 1, G. D Agostino 2, C. Del Negro 1, A. Di Stefano 1, A. Germak 2, R. Napoli 1, C. Origlia 2, A. Pistorio 1, 3,
More informationThirty years of satellite derived lava discharge rates at Etna: Implications for steady volumetric output
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 116,, doi:10.1029/2011jb008237, 2011 Thirty years of satellite derived lava discharge rates at Etna: Implications for steady volumetric output Andrew Harris, 1 Andrea
More informationvolcanic tremor and Low frequency earthquakes at mt. vesuvius M. La Rocca 1, D. Galluzzo 2 1
volcanic tremor and Low frequency earthquakes at mt. vesuvius M. La Rocca 1, D. Galluzzo 2 1 Università della Calabria, Cosenza, Italy 2 Istituto Nazionale di Geofisica e Vulcanologia Osservatorio Vesuviano,
More informationPUBLICATIONS. Geophysical Research Letters. Spatially resolved SO 2 flux emissions from Mt Etna RESEARCH LETTER 10.
PUBLICATIONS Geophysical Research Letters RESEARCH LETTER Key Points: Records of SO 2 flux emissions from Etna s individual vents allow capturing shifts in volcanic activity Vent-resolved SO 2 flux time
More informationEAS 116 Earthquakes and Volcanoes
EAS 116 Earthquakes and Volcanoes J. Haase Forecasting Volcanic Eruptions Assessment of Volcanic Hazard Is that volcano active? Mount Lassen: 12000 BP and 1915 Santorini, IT: 180,000 BP, 70,000 BP, 21000
More informationMonthly Volcanic Activity Report (February 2016)
Monthly Volcanic Activity Report (February 2016) Japan Meteorological Agency Azumayama (Alert Level: 2) Fumarolic activity at the Oana crater has remained at relatively high levels. Aerial observation
More information0911 Andò, B., M. Coltelli and M. Sambataro, A measurement tool for investigating cooling lava properties, IEEE T INSTRUM MEAS 53, 2,
Pubblicazioni 2004 0909 Aiuppa, A., M. Burton, F. Mure and S. Inguaggiato, 2004. Intercomparison of volcanic gas monitoring methodologies performed on Vulcano Island, Italy, Geophys. Res. Lett., 31, 2,
More information68. Izu-Torishima. Summary. Latitude: 30 29'02" N, Longitude: '11" E, Elevation: 394 m (Ioyama) (Elevation Point) (68.
68. Izu-Torishima Latitude: 30 29'02" N, Longitude: 140 18'11" E, Elevation: 394 m (Ioyama) (Elevation Point) Izu-Torishima taken from southeast side on August 12, 2002. Courtesy of the Maritime Safety
More informationMonthly Volcanic Activity Report (July, 2012)
Monthly Volcanic Activity Report (July, 2012) Tokachidake [Alert Level: 1] Volcanic glows have been observed in the Taisho crater with a high-sensitivity camera at night from the night of June 30th to
More informationAdvantageous GOES IR results for ash mapping at high latitudes: Cleveland eruptions 2001
GEOPHYSICAL RESEARCH LETTERS, VOL. 32, L02305, doi:10.1029/2004gl021651, 2005 Advantageous GOES IR results for ash mapping at high latitudes: Cleveland eruptions 2001 Yingxin Gu, 1 William I. Rose, 1 David
More informationACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT
Seismic and Infrasound Signals at Mt. Etna: Modelling the North-East Crater Conduit and its Relation with the 2008-2009 Eruption Feeding System Mariangela Sciotto Dipartimento di Scienze Biologiche, Geologiche
More information3D Lava flow mapping of the May 2016 Etna eruption using tri-stereo optical satellite data
3D Lava flow mapping of the 17 25 May 2016 Etna eruption using tri-stereo optical satellite data GAETANA GANCI 1*, ANNALISA CAPPELLO 1, VITO ZAGO 1,2, GIUSEPPE BILOTTA 1, ALEXIS HERAULT 1,3, CIRO DEL NEGRO
More informationPavlof. Alaska Peninsula N, W; summit elev. 2,519 m. All times are local (= UTC - 9 hours)
Pavlof Alaska Peninsula 55.42 N, 161.887 W; summit elev. 2,519 m All times are local (= UTC - 9 hours) Eruption in May-June 2013 with lava flows and ash emissions to ~8.5 km a.s.l. Pavlof, the most active
More informationMER from ground observations: practices and progresses at Osservatorio Etneo for measuring ash clouds-forming eruptions of the Etna volcano
MER from ground observations: practices and progresses at Osservatorio Etneo for measuring ash clouds-forming eruptions of the Etna volcano Mauro Coltelli INGV Osservatorio Etneo, Catania, Italy MeMoVolc
More informationInverse Modeling in Geophysical Applications
Communications to SIMAI Congress, ISSN 1827-9015, Vol. 1 (2006) DOI: 10.1685/CSC06036 Inverse Modeling in Geophysical Applications Daniele Carbone, Gilda Currenti, Ciro Del Negro, Gaetana Ganci, Rosalba
More informationTopic 1: Modeling SFU: (JVGR 1992)
Topic 1: Modeling SFU: (JVGR 1992) 1. Were different chamber top shapes used other than flat, i.e. convex, concave, convoluted / ridged? What is the sensitivity of your models to this? Also, was there
More informationA - Piton de la Fournaise activity
OVPF-IPGP August 2018 Page 1/7 Monthly bulletin of the Piton de la Fournaise Volcanological Observatory ISSN ISSN 2610-5101 A - Piton de la Fournaise activity PITON DE LA FOURNAISE (VNUM #233020) Latitude:
More informationGeophysical Classification of Strombolian Explosive eruption
Geophysical Classification of Strombolian Explosive eruption Ripepe M. and E. Marchetti Department of Earth Sciences, University of Firenze, Firenze - Italy Monitoring Centre for Civil Protection - Italian
More informationGeochemical evaluation of observed changes in volcanic activity during the 2007 eruption at Stromboli (Italy)
Geochemical evaluation of observed changes in volcanic activity during the 2007 eruption at Stromboli (Italy) A. Rizzo, F. Grassa, S. Inguaggiato, M. Liotta, M. Longo, P. Madonia, L. Brusca, G. Capasso,
More informationINVERSE MODELING IN GEOPHYSICAL APPLICATIONS
1 INVERSE MODELING IN GEOPHYSICAL APPLICATIONS G. CURRENTI,R. NAPOLI, D. CARBONE, C. DEL NEGRO, G. GANCI Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania, Catania, Italy E-mail: currenti@ct.ingv.it
More informationSIMULATIONS OF THE 2004 LAVA FLOW AT ETNA VOLCANO BY THE MAGFLOW CELLULAR AUTOMATA MODEL
SIMULATIONS OF THE 2004 LAVA FLOW AT ETNA VOLCANO BY THE MAGFLOW CELLULAR AUTOMATA MODEL Ciro Del Negro 1, Luigi Fortuna 2, Alexis Herault 1,3, Annamaria Vicari 1 1 Istituto Nazionale di Geofisica e Vulcanologia
More informationGSNL - Geohazard Supersites and Natural Laboratories. Biennial report for Candidate/Permanent Supersite. Hawaiʻi Supersite. Annex to report
Introduction Biennial report for Candidate/Permanent Supersite Hawaiʻi Supersite Annex to 2014 2016 report During 2014 2016, the Hawaiʻi Supersite achieved a number of noteworthy results. This annex details
More informationMonthly Volcanic Activity Report (March 2013)
Monthly Volcanic Activity Report (March 2013) Hakoneyama (Alert Level: 1) Shallow earthquake activity from the area near Mt. Komagatake to Sengokuhara has largely remained at low levels since the middle
More informationIgneous and Metamorphic Rock Forming Minerals. Department of Geology Mr. Victor Tibane SGM 210_2013
Igneous and Metamorphic Rock Forming Minerals Department of Geology Mr. Victor Tibane 1 SGM 210_2013 Intrusive and Effusive Rocks Effusive rocks: rapid cooling small crystalls or glas Lava & ash Magmatic
More informationLava effusion - A slow fuse for paroxysms at Stromboli volcano?
Lava effusion - A slow fuse for paroxysms at Stromboli volcano? S. Calvari, L. Spampinato, A. Bonaccorso, Clive Oppenheimer, E. Rivalta, E. Boschi To cite this version: S. Calvari, L. Spampinato, A. Bonaccorso,
More informationThermal anomalies at Stromboli volcano from MODIS data
Mem. S.A.It. Suppl. Vol. 12, 60 c SAIt 2008 Memorie della Supplementi Thermal anomalies at Stromboli volcano from MODIS data D. Piscopo 1, D. Coppola 1, D. Delle Donne 2, C. Cigolini 1, and M. Di Martino
More informationin natural waters: development of an automated monitoring system and first application to Stromboli volcano (Italy)
ANNALS OF GEOPHYSICS, 54, 2, 2011; doi: 10.4401/ag-5180 Dissolved CO 2 in natural waters: development of an automated monitoring system and first application to Stromboli volcano (Italy) Salvatore Inguaggiato
More informationHeidy Mader, Michael Burton, Margherita Polacci. A combined physico-chemical model for passive degassing from Stromboli volcano.
Heidy Mader, Michael Burton, Margherita Polacci A combined physico-chemical model for passive degassing from Stromboli volcano. 2 Degassing at Stromboli Degassing from basaltic volcanoes is the most common
More informationScanning tomography of SO 2 distribution in a volcanic gas plume
GEOPHYSICAL RESEARCH LETTERS, VOL. 35, L17811, doi:10.1029/2008gl034640, 2008 Scanning tomography of SO 2 distribution in a volcanic gas plume T. E. Wright, 1 M. Burton, 2 D. M. Pyle, 3 and T. Caltabiano
More informationVolcanic ash retrieval at Mt. Etna using Avhrr and Modis data
Volcanic ash retrieval at Mt. Etna using Avhrr and Modis data Claudia Spinetti* a, Stefano Corradini a, Maria F. Buongiorno a a Istituto Nazionale di Geofisica e Vulcanologia, via di Vigna Murata, 605
More informationLiving in the shadow of Italy's volcanoes
Living in the shadow of Italy's volcanoes Where is Mount Etna? Mount Etna is located on the east coast of Sicily roughly midway between Messina and Catania (Figure 1). It is the largest and tallest volcano
More informationGravity steps at Mt. Etna volcano (Italy). Instrumental effects or. evidences of earthquake-triggered magma density changes?
Gravity steps at Mt. Etna volcano (Italy). Instrumental effects or evidences of earthquake-triggered magma density changes? D. Carbone 1, P. Jousset 2, C. Musumeci 1 1 - Istituto Nazionale di Geofisica
More informationLECTURE #11: Volcanoes: Monitoring & Mitigation
GEOL 0820 Ramsey Natural Disasters Spring, 2018 LECTURE #11: Volcanoes: Monitoring & Mitigation Date: 15 February 2018 I. What is volcanic monitoring? the continuous collection of one or more data sources
More informationThe role of gas percolation in quiescent degassing of persistently active basaltic volcanoes
Available online at www.sciencedirect.com Earth and Planetary Science Letters 264 (2007) 46 60 www.elsevier.com/locate/epsl The role of gas percolation in quiescent degassing of persistently active basaltic
More informationRemote Detection and Monitoring of Volcanic Eruptions in the East African Rift
Remote Detection and Monitoring of Volcanic Eruptions in the East African Rift Simon Carn 1, David Fee 2, Fred Prata 3 1 Department of Geological and Mining Engineering and Sciences, Michigan Technological
More informationMulti-parameter investigations at Fuego and Santiaguito volcanoes
Multi-parameter investigations at Fuego and Santiaguito volcanoes John Lyons Michigan Technological University PASI Workshop - January 2011, Costa Rica PIRE 0530109 Multi-parameter approach to studying
More informationThe 2007 Stromboli eruption: event chronology and effusion rates using thermal infrared data
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 The 2007 Stromboli eruption: event chronology and effusion rates using thermal infrared
More information( ) USGS (United States Geological Survey) Watch Green. Normal. alert level 1 Normal
(200610.1) USGS (United States Geological Survey) 1014 alert level 1 Normal Watch Green Normal USGS WARNING WATCH ADVISORY NORMAL SUMMARY OF VOLCANIC-ALERT LEVELS Highly hazardous eruption underway or
More informationHEAT AND MASS TRANSFER PROCESSES AFTER 1995 PHREATIC ERUPTION OF KUJU VOLCANO, CENTRAL KYUSHU, JAPAN
HEAT AND MASS TRANSFER PROCESSES AFTER 1995 PHREATIC ERUPTION OF KUJU VOLCANO, CENTRAL KYUSHU, JAPAN Sachio Ehara 1,Yasuhiro Fujimitsu 1, Jun Nishijima 1,Akira Ono 1 and Yuichi Nakano 1 1 Laboratory of
More informationReport on the field campaign to Guatemala, Fuego and Santiaguito volcanoes, in June-July By Jose Luis Palma and John Lyons
Report on the field campaign to Guatemala, Fuego and Santiaguito volcanoes, in June-July 2008 By Jose Luis Palma and John Lyons Other participants of the field campaign: Kyle Brill (PCMI), Jemile Erdem
More informationUGRC 144 Science and Technology in Our Lives/Geohazards
UGRC 144 Science and Technology in Our Lives/Geohazards Session 5 Magma and Volcanism Lecturer: Dr. Patrick Asamoah Sakyi Department of Earth Science, UG Contact Information: pasakyi@ug.edu.gh College
More informationQuantifying probabilities of eruption at a well-monitored. active volcano: an application to Mount Etna (Sicily, Italy).
Quantifying probabilities of eruption at a well-monitored active volcano: an application to Mount Etna (Sicily, Italy). A. Brancato 1*, S. Gresta 1, L. Sandri 2, J. Selva 2, W. Marzocchi 3, S. Alparone
More informationA New Automatic Pattern Recognition Approach for the Classification of Volcanic Tremor at Mount Etna, Italy
A New Automatic Pattern Recognition Approach for the Classification of Volcanic Tremor at Mount Etna, Italy M. Masotti 1, S. Falsaperla 2, H. Langer 2, S. Spampinato 2, R. Campanini 1 1 Medical Imaging
More informationMonthly Volcanic Activity Report (April 2013)
Monthly Volcanic Activity Report (April 2013) Zaozan (Calm) Small-amplitude volcanic tremors were recorded on April 7 (duration: 3 min 20 sec), 9 (4 min 20 sec) and 21 (5 min 40 sec). These were the first
More informationInsights into the internal dynamics of Etna volcano through discrete and continuous. microgravity observations
Insights into the internal dynamics of Etna volcano through discrete and continuous microgravity observations Daniele Carbone 1 and Filippo Greco 1 1 - Istituto Nazionale di Geofisica e Vulcanologia -
More informationMonthly Volcanic Activity Report (March, 2011)
Monthly Volcanic Activity Report (March, 2011) Japan Meteorological Agency Yakedake[ Alert Level : 1] Just after "The 2011 off the Pacific coast of Tohoku Earthquake" on 11th March, seismicity became higher
More informationRequirements for a survey system of active volcanoes based on muon radiography
Requirements for a survey system of active volcanoes based on muon radiography Philippe LABAZUY on behalf of the TOMUVOL Collaboration http://www.tomuvol.fr/ Laboratoire Magmas et Volcans, Laboratoire
More informationPahoehoe flow cooling, discharge, and coverage rates from thermal image chronometry
GEOPHYSICAL RESEARCH LETTERS, VOL. 34, L19303, doi:10.1029/2007gl030791, 2007 Pahoehoe flow cooling, discharge, and coverage rates from thermal image chronometry Andrew J. L. Harris, 1 Jonathan Dehn, 2
More informationGEOS 606 Physical Volcanology GEOS 606 CRN credits
GEOS 606 Physical Volcanology GEOS 606 CRN 74060 3 credits September 1th December 17 th, 2011 Mondays, Wednesdays and Fridays MWF 10:30-11:30 Irving 208 and Elvey 101 Dr. Jonathan Dehn office: WRRB 108G,
More informationMonthly Volcanic Activity Report (February, 2011)
Monthly Volcanic Activity Report (February, 2011) Japan Meteorological Agency Izu-Oshima[ Alert Level : 1] Earthquakes at the western offshore areas of Izu-Oshima increased on 9 th temporarily in this
More informationMonitoring Volcanoes & Predicting Eruptions. I.G Kenyon
Monitoring Volcanoes & Predicting Eruptions I.G Kenyon Why Monitor? At least 200,000 people killed by volcanoes over the last 500 years Why Monitor? 500 active volcanoes on land 10% of world population
More informationGEOLOGY MEDIA SUITE Chapter 12
UNDERSTANDING EARTH, SIXTH EDITION GROTZINGER JORDAN GEOLOGY MEDIA SUITE Chapter 12 Volcanoes 2010 W.H. Freeman and Company Plate tectonics explains the global pattern of volcanism. Key Figure 12.20 (page
More informationIntroduction to Earth s s Spheres The Benchmark
Introduction to Earth s s Spheres The Benchmark Volcanism Volcanic eruptions Effusive: lavas (e.g., Kilauea) Volcanism Volcanic eruptions Explosive: pyroclastic rocks (e.g., Krakatau) Factors Governing
More informationThe shallow magma pathway geometry at Mt. Etna volcano
1 The shallow magma pathway geometry at Mt. Etna volcano D. Patanè Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania, P.zza Roma 2, 95123 Catania, Italy G. Di Grazia Istituto Nazionale
More informationKinematics and strain analyses of the eastern segment of the Pernicana Fault (Mt. Etna, Italy) derived from geodetic techniques ( )
ANNALS OF GEOPHYSICS, VOL. 49, N. 4/5, August/October 2006 Kinematics and strain analyses of the eastern segment of the Pernicana Fault (Mt. Etna, Italy) derived from geodetic techniques (1997-2005) Mimmo
More informationA - Piton de la Fournaise activity
OVPF-IPGP November 2018 Page 1/7 Monthly bulletin of the Piton de la Fournaise Volcanological Observatory ISSN ISSN 2610-5101 A - Piton de la Fournaise activity PITON DE LA FOURNAISE (VNUM #233020) Latitude:
More informationVolcanic and seismic activity at Stromboli preceding the
Volcanic and seismic activity at Stromboli preceding the 0-0 eruption Burton M., Calvari S., Spampinato L., Lodato L., Pino N.A., Marchetti E., Murè F. Abstract Regular surveys with a PM FLIR thermal imaging
More informationMonthly Volcanic Activity Report (November 2015)
Monthly Volcanic Activity Report (November 2015) Japan Meteorological Agency Meakandake (Alert Level: 1) Alert level downgrade from 2 to 1 on 13 November A field survey conducted from 2 to 5 November showed
More informationImages from: Boston.com
Images from: Boston.com Ireland in the shadow of a volcano: Understanding the 2010 eruption at Eyjafjallajökull, Iceland. Chris Bean, School of Geological Sciences, UCD. World Quakes and Volcanoes 1960-2010
More informationLinking volcanic tremor, degassing, and eruption dynamics via SO 2 imaging
GEOPHYSICAL RESEARCH LETTERS, VOL. 38,, doi:10.1029/2010gl045820, 2011 Linking volcanic tremor, degassing, and eruption dynamics via SO 2 imaging Patricia A. Nadeau, 1 José L. Palma, 1,2 and Gregory P.
More informationMonthly Volcanic Activity Report (August 2015)
Monthly Volcanic Activity Report (August 2015) Japan Meteorological Agency Meakandake (Alert Level: 2) Volcanic seismicity in shallow parts under the area around the Ponmachineshiri crater began to fluctuate
More informationTerminal settling velocity measurements of volcanic ash during the Etna eruption by an X-band microwave rain gauge disdrometer
GEOPHYSICAL RESEARCH LETTERS, VOL. 32, L10302, doi:10.1029/2004gl022100, 2005 Terminal settling velocity measurements of volcanic ash during the 2002 2003 Etna eruption by an X-band microwave rain gauge
More informationA - Piton de la Fournaise activity
OVPF-IPGP September 2018 Page 1/10 Monthly bulletin of the Piton de la Fournaise Volcanological Observatory ISSN ISSN 2610-5101 A - Piton de la Fournaise activity PITON DE LA FOURNAISE (VNUM #233020) Latitude:
More informationEvidence of a recent input of magmatic gases into the quiescent volcanic edifice of Panarea, Aeolian Islands, Italy
GEOPHYSICAL RESEARCH LETTERS, VOL. 31, L07619, doi:10.1029/2003gl019359, 2004 Evidence of a recent input of magmatic gases into the quiescent volcanic edifice of Panarea, Aeolian Islands, Italy S. Caliro,
More informationDEEP-SEATED SPREADING MODEL TESTED ON ETNA MOUNT WITH FEM
Presented at the COMSOL Conference 2008 Hannover DEEP-SEATED SPREADING MODEL TESTED ON ETNA MOUNT WITH FEM Pulvirenti F.* 1,2, Aloisi M. 1, Mattia M. 1 and Monaco C. 2 1 Istituto Nazionale di Geofisica
More informationPatterns in open vent, strombolian behavior at Fuego volcano, Guatemala,
DOI 1.17/s445-9-35-7 RESEARCH ARTICLE Patterns in open vent, strombolian behavior at Fuego volcano, Guatemala, 25 27 John J. Lyons & Gregory P. Waite & William I. Rose & Gustavo Chigna Received: 2 November
More informationRelation between single very long period pulses and volcanic gas emissions at Mt. Asama, Japan
GEOPHYSICAL RESEARCH LETTERS, VOL. 38,, doi:10.1029/2011gl047555, 2011 Relation between single very long period pulses and volcanic gas emissions at Mt. Asama, Japan Ryunosuke Kazahaya, 1 Toshiya Mori,
More informationERTH 456 / GEOL 556 Volcanology. Lecture 06: Conduits
1 / 28 ERTH 456 / GEOL 556 Volcanology Lecture 06: Conduits Ronni Grapenthin rg@nmt.edu MSEC 356, x5924 hours: TR 3-4PM or appt. September 12, 2016 2 / 28 How does magma get from source to surface? What
More informationHands-on Activity Predicting Eruptions on Montserrat
Hands-on Activity Predicting Eruptions on Montserrat Predicting Eruptions No one can predict exactly when a volcano might explode. There are, however, common clues to look for to let people know that the
More informationM 7.2 Earthquake along Iraq Iran border Sunday, November 12, Close to boundary of the Arabian and Eurasian Plates
M 7.2 Earthquake along Iraq Iran border Sunday, November 12, 2017 Close to boundary of the Arabian and Eurasian Plates Length of Lava Flows Since the path of a lava flow is controlled by topography it
More informationContinuously Monitored by JMA. Overview of Kuchinoerabujima taken from the East on July 23, 1996 by the Japan Meteorological Agency
94. Kuchinoerabujima Continuously Monitored by JMA Latitude: 30 26'36" N, Longitude: 130 13'02" E, Elevation: 657 m (Furudake) (Elevation Point) Overview of Kuchinoerabujima taken from the East on July
More informationD) outer core B) 1300 C A) rigid mantle A) 2000 C B) density, temperature, and pressure increase D) stiffer mantle C) outer core
1. In which area of Earth's interior is the pressure most likely to be 2.5 million atmospheres? A) asthenosphere B) stiffer mantle C) inner core D) outer core Base your answers to questions 2 and 3 on
More informationIntroduction to Volcanic Seismology
Introduction to Volcanic Seismology Second edition Vyacheslav M. Zobin Observatorio Vulcanolo'gico, Universidad de Colima, Colima, Col., Mexico ELSEVIER AMSTERDAM BOSTON HEIDELBERG LONDON * NEW YORK OXFORD
More informationMonthly Volcanic Activity Report (April 2015)
Monthly Volcanic Activity Report (April 2015) Japan Meteorological Agency Meakandake (Alert Level: 1) The number of small shallow earthquakes occurring near the Ponmachineshiri crater increased from 15
More informationApplication of Support Vector Machine to the classification of volcanic tremor at Etna, Italy
Click Here for Full Article GEOPHYSICAL RESEARCH LETTERS, VOL. 33,, doi:10.1029/2006gl027441, 2006 Application of Support Vector Machine to the classification of volcanic tremor at Etna, Italy M. Masotti,
More informationEstimates of the Dynamics of Volcano Eruption Column Using Real-time AVHRR Data
Estimates of the Dynamics of Volcano Eruption Column Using Real-time AVHRR Data Ignacio Galindo Centro Universitario de Investigaciones en Ciencias del Ambiente (CUICA) UNIVERSIDAD DE COLIMA, Colima, México
More informationJOURNAL OF GEOPHYSICAL RESEARCH, VOL. 111, B04203, doi: /2005jb003934, 2006
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 111,, doi:10.1029/2005jb003934, 2006 Melt inclusion record of the conditions of ascent, degassing, and extrusion of volatile-rich alkali basalt during the powerful
More information*Nuccio P.M., Paonita A., # Rizzo A., *Rosciglione A. During , Mount Etna was characterized by intense eruptive activity involving
ELEMENTAL AND ISOTOPE COVARIATION OF NOBLE GASES IN MINERAL PHASES FROM ETNEAN VOLCANICS ERUPTED DURING 2001 2005, AND GENETIC RELATION WITH PERIPHERAL GAS DISCHARGES *Nuccio P.M., Paonita A., # Rizzo
More informationGEOLOGY 285: INTRO. PETROLOGY
Dr. Helen Lang Dept. of Geology & Geography West Virginia University FALL 2005 GEOLOGY 285: INTRO. PETROLOGY Mount St. Helens 1980 Eruption Small earthquakes Small steam and ash eruptions in March and
More informationNSF-MARGINS Expedition to Anatahan Volcano March 2005
1 NSF-MARGINS Expedition to Anatahan Volcano March 2005 According to the Emergency Management Office (EMO) report distributed in February 2005, the third historical eruption of Anatahan began on January
More information