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1 Satellite Monitoring of the 2014 Dyke Intrusion and Eruption within the Bárðarbunga Volcanic System, facilitated by the CEOS Icelandic SUPERSITE M Parks, S Dumont, V Drouin, F Sigmundsson, K Spaans, A Hooper, T Árnadóttir, E R Heimisson, B Ófeigsson, S Hreinsdóttir, H M Friðriksdóttir, E Magnússon, K Vogfjörd, G Guðmundsson, K Jónsdóttir, M Hensch, B Brandsdóttir, S Samsonov, I Jónsdóttir, M T Gudmundsson, T Högnadóttir, P Einarsson, A R Hjartardóttir, K Michalczewska, S Hjaltadóttir and E Sturkell Photo credit: S Dumont
2 Overview Volcano deformation monitoring in Iceland: FUTUREVOLC and the Icelandic SUPERSITE Monitoring Bárðarbunga unrest and eruption Seismicity, GPS and Satellite images Deformation modelling Stress modelling - how has the eruption influenced neighbouring volcanoes? Eruption ended on Feb what happens next? Plan for continued deformation monitoring sensitivity of cgps network and importance of InSAR
3 FUTUREVOLC A European volcanological supersite in Iceland: a monitoring system and network for the future European collaboration comprising 26 partners aimed at long term volcano monitoring Primary objectives: Establish an integrated volcanological monitoring procedure Develop new methods to evaluate volcanic crises Increase scientific understanding of magmatic processes Improve delivery of relevant information to civil protection and authorities
4 VOLCANIC SUPERSITE IN ICELAND CEOS nominated Iceland as a permanent Supersite in 2013 Study area includes the most active volcanoes SAR data resources awarded: COSMO-Skymed: 300 scenes per year plus 500 past acquisitions TerraSAR-X: 250 scenes per year plus 550 past acquisitions Radarsat-2: 160 scenes per year Eyjafjallajökull 17 April 2010 (MODIS)
5 Initial activity following the main fissure eruption on the 31 Aug, 2014 Date 3 Sep, 2014 Photo credit: M Parks
6 Photo credit: M Parks Overflight 4 Nov, 2014
7 Photo credit: G Pedersen The vent, lava pond and part of the lava field at 16:30 21 January 2015
8 Seismicity since the 16 th August. Preliminary data analysed by the SIL seismic monitoring group of the Icelandic Meteorological Office, as of the 9 th September, 2014 (IMO, 2014). Source:
9 Evolution of seismicity and GPS displacements during the 2014 unrest and start of the eruption From Sigmundsson et al., Segmented lateral dyke growth in a rifting event at Bárðarbunga volcanic system, Iceland, Nature, doi: /nature14111
10 Dyke emplacement
11 Caldera subsidence
12 CSK footprints over Holuhraun and Bárðarbunga
13 TSX footprints over Holuhraun and Bárðarbunga
14 InSAR over Holuhraun eruption site Processing carried out using CSK Products, ASI (Italian Space Agency) 2014, delivered under an ASI licence to use. COSMO-SkyMed (CSK) data were provided by the Italian Space Agency (ASI) through the Icelandic Volcanoes Supersite project supported by the Committee on Earth Observing Satellites (CEOS) and Geohazard Supersites & Natural Laboratories (GSNL).
15 InSAR over Holuhraun eruption site Processing carried out using CSK Products, ASI (Italian Space Agency) 2014, delivered under an ASI licence to use. COSMO-SkyMed (CSK) data were provided by the Italian Space Agency (ASI) through the Icelandic Volcanoes Supersite project supported by the Committee on Earth Observing Satellites (CEOS) and Geohazard Supersites & Natural Laboratories (GSNL).
16 Examples of Bárðarbunga 1-day interferograms August unwrapped interferogram Processing carried out using CSK Products, ASI (Italian Space Agency) 2014, delivered under an ASI licence to use. COSMO-SkyMed (CSK) data were provided by the Italian Space Agency (ASI) through the Icelandic Volcanoes Supersite project supported by the Committee on Earth Observing Satellites (CEOS) and Geohazard Supersites & Natural Laboratories (GSNL).
17 Examples of Bárðarbunga 1-day interferograms Processing carried out using CSK Products, ASI (Italian Space Agency) 2014, delivered under an ASI licence to use. COSMO-SkyMed (CSK) data were provided by the Italian Space Agency (ASI) through the Icelandic Volcanoes Supersite project supported by the Committee on Earth Observing Satellites (CEOS) and Geohazard Supersites & Natural Laboratories (GSNL).
18 Examples of Bárðarbunga 1-day interferograms Processing carried out using CSK Products, ASI (Italian Space Agency) 2014, delivered under an ASI licence to use. COSMO-SkyMed (CSK) data were provided by the Italian Space Agency (ASI) through the Icelandic Volcanoes Supersite project supported by the Committee on Earth Observing Satellites (CEOS) and Geohazard Supersites & Natural Laboratories (GSNL).
19 Examples of Bárðarbunga 1-day interferograms Processing carried out using CSK Products, ASI (Italian Space Agency) 2014, delivered under an ASI licence to use. COSMO-SkyMed (CSK) data were provided by the Italian Space Agency (ASI) through the Icelandic Volcanoes Supersite project supported by the Committee on Earth Observing Satellites (CEOS) and Geohazard Supersites & Natural Laboratories (GSNL).
20 Modelling deep source of subsidence at Bárðarbunga caldera 2 distinct deformation processes (elastic and inelastic) Magma withdrawal from deeper chamber Piston collapse Multiple models and codes were tested Mogi, Penny shaped crack, Yang spheroid Mogi point source is most stable
21 10 cgps sites included in the modelling DYNC GFUM GJAC HAFS HAUC JOKU KALF KIDC THOC VONC
22 Inversion for the temporal evolution of source parameters: Projected XY source location Using code outlined by Biggs et al., 2010: Biggs, et al. 2010, Magma flux at Okmok Volcano, Alaska, from a joint inversion of continuous GPS, campaign GPS, and interferometric synthetic aperture radar. Journal of Geophysical Research: Solid Earth ( ) 115.B12.
23 Inversion for the temporal evolution of source parameters: Cumulative volume change Time period: 21 Sep-26 Feb, source depth: 8.5 km References: Biggs et al., JGR, DOI: /2010JB Parks et al., JGR, DOI: /2014JB
24 Bayesian inversion of GPS and InSAR
25 Stress modelling seismic triggering at neighbouring Tungnafellsjökull
26 End of the eruption Feb 2015 Lava drained from the main crater on the 26 th /27 th Feb 2015 Field teams visited the area on the 1 st March Photo credit: Á Höskuldsson
27 What happens next Nothing Bárðarbunga returns to a state of quiescence New influx of magma: Second dyke intrusion and fissure eruption (possibly beneath the glacier) e.g eruption on both the Veiðivötn and the Dyngjuháls swarm to the NE (0.3 km 3 ) or Gjálp 1996 (0.45 km 3 tephra, 3.5 km 3 jökulhlaup max. discharge rate ~45,000 m 3 /s Explosive summit eruption e.g Explosive phreatomagmatic eruption on fissure swarm e.g. Vatnaöldur ~870 and Veiðivötn ~1477 (~5 and ~10 km 3 respectively). Continued deformation monitoring is crucial to detect potential signs of renewed activity!
28 Icelandic weather stops for no one Very difficult to deploy and maintain field equipment during the winter Problems with icing on GPS antennas SAR data in invaluable for continued deformation monitoring!
29 Thank you to: - CEOS and GSNL - FUTUREVOLC partners and collaborators - ASI, DLR, ESA and CSA - Funding from EC FP7 Framework programme is gratefully acknowledged Takk Fyrir! Photo credit: M Parks
30 Mapping the extent of the 2014 Holuhraun lava flows and changes in the Bárðarbunga ice-cap
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