SUPPLEMENTARY INFORMATION
|
|
- Elmer Crawford
- 5 years ago
- Views:
Transcription
1 SUPPLEMENTARY INFORMATION doi: /ngeo739 Supplementary Information to variability and distributed deformation in the Marmara Sea fault system Tobias Hergert 1 and Oliver Heidbach 1,* 1 Geophysical Institute, Universität Karlsruhe (TH), Hertzstr. 16, Karlsruhe, Germany. * now at GFZ German Research Centre for Geosciences, Telegrafenberg, Potsdam, Germany. Fault geometry We constructed the fault geometry using fault maps 7,15 and results from seismic imaging 6,14,15,16. We assumed a through-going MMF that is locally non-vertical along the edges of the basins in its upper part but vertical below 15 km bsl. As a major plate boundary fault it extends to the bottom of the model at 38 km depth. The Middle branch of the NAF extends to 20 km depth and the other faults to 15, 10 and 7.5 km, with the longer faults extending deeper than the smaller ones. Faults dip steeply at angles between 70 and 90, with faults on the northern shelf dipping to the south and those south of the MMF to the north. Rock properties The basement-topography and Moho were constructed using the constraints from seismic velocities and from reflections/refractions of seismic waves 6,14. Representative values for elastic parameters and density are assigned to sediments, basement and mantle, respectively (Suppl. Table 1). Sediments Basement Upper Mantle Density [g/cm³] Poisson s ratio Young s modulus [GPa] Modelling interseismic velocities and fault slip rates A coefficient of effective friction of µ =0.05 is assigned to fault portions deeper than 15 km bsl. Above this depth we consider two cases. The first is the locked-fault case with infinite fault friction in the seismogenic layer to simulate interseismic deformation for comparison with GPS observations (Suppl. Fig. 1a). The second is the unlocked-fault case with uniform friction of µ =0.05 throughout the whole depth range of the fault in order to obtain the long- nature geoscience 1
2 supplementary information doi: /ngeO739 term fault slip rates (Suppl. Fig. 1b). The value of µ =0.05 was found appropriate for the NAF 23,24. In contrast to the common approach 25 we do not impose slip on the faults below the seismogenic depth. Instead, boundary conditions at the sides of the model govern slip on faults according to the Coulomb friction law τ = µ σ n where τ is shear stress and σ n fault normal stress. ocked fault case with infinite effective coefficient of friction in the seismogenic layer in the uppermost 15 km and. 5 below. t the surface interseismic deformation evolves while there is no fault slip in the seismogenic layer., nlocked fault case with uniform of. 5. emporally continuous fault slip evolves. Note, that in both cases slip is not prescribed on the faults as commonly done. Instead slip evolves in response to remote kinematic boundary conditions applied at the sides of the model. Kinematic boundary conditions from a 3D regional model In order to obtain appropriate boundary conditions for our Marmara model we apply the socalled sub-modelling technique, i.e. we drive the model by the velocity field derived from a larger-scale 3D model of Northwest Anatolia that we term in the following regional model (Suppl. Fig. 2). We keep the northern side of this regional model fixed and allow lateral velocities at the eastern and western model boundary north of the NAF only in NS direction, not perpendicular to it (Suppl. Fig. 2). South of the northern branch of the NAF we apply a modified rotation around the Euler Pole of the Anatolian Plate 5, with the velocity between 29 and 33 E at the southern model boundary kept constant. Additionally, south of the NAF and east of 28 E we applied the west-component of the Euler rotation at the bottom of the model. The bottom of the model is otherwise laterally unconstrained while vertical velocities are constrained to zero. The velocity field resulting from this regional model largely reproduces the observed velocity field (Suppl. Fig. 2). Comparison of the kinematic results of the regional model with GPS velocities revealed that a friction coefficient of µ =0.05 gave the best-fit results. This modelled best-fit velocity field is used to drive the Marmara model at its lateral boundaries. 2 nature geoscience
3 doi: /ngeo739 supplementary information Technically, the modelled velocity field from this regional model is mapped onto the nodes of the finite elements that form the lateral boundaries of the Marmara model. Black lines denote faults implemented in the regional model as contact surfaces to allow for frictional sliding according to Coulomb friction. Grey symbols and arrows denote applied displacement boundary conditions for the regional model in order to fit the GPS velocities 5. Triangles denote that the regional model is fixed on its northern side, circles indicate that displacement is only allowed parallel to the sides. Red arrows show modelled velocities at GPS sites in comparison with GPS derived velocities 5 (blue arrows). elocities from this best fit regional model with friction coefficient of. 5 are applied to the lateral boundaries of the Marmara model (black box). Model loads Besides the kinematic boundary conditions the model is subjected to the body force of gravity. Furthermore, the load of the seawater on the sea floor is applied. MMF slip rate at depth While Fig. 3b provides fault slip rates at the surface, Suppl. Fig. 3 shows the MMF slip rate at 15 km below sea level. on the MMF at depth is less than ~1 greater than at the surface. This is due to the fact that the smaller faults end at shallower depths so that the relative motion accommodated by these faults in the uppermost kilometres is taken up by the MMF at greater depths. Furthermore, the MMF in the model becomes somewhat straighter with depth, which facilitates fault slip. nature geoscience 3
4 supplementary information doi: /ngeO739 Black lines mark fault traces at the surface of the model. Deviations between MMF slip rate of this study and previous estimates Supplementary Table 2 provides a quantitative comparison of the MMF slip rate from this study with previous estimates. Depending on location and study our slip rates are % smaller than previous estimates. When taking our upper bound slip rate of ~2 more (see below) the s become correspondingly smaller and our rates would be similar to those of reference 2. Study Ganos Segment Central Segment Prince s Islands Seg. Izmit Segment this study Ref % % % % Ref % % % % Ref % % % % Ref % % % % * Basis for the comparison are the fault slip rates displayed in Figure 3b. ** Locations of the fault segments are given in Supplementary Figure 3. Uncertainty of the modelled MMF slip rate We explored end-member cases with regard to the uncertainties of the model parameters to constrain an upper bound slip rate for the MMF. Greater slip rates on the MMF are conceivable if (1) Internal deformation between the faults is reduced. This means lower coefficient of friction on the faults and/or stiffer rock, i.e. increased Young s modulus E. (2) The MMF slip rate would increase if slip partitioning is reduced, i.e. if the other faults besides 4 nature geoscience
5 doi: /ngeo739 supplementary information the MMF contribute less to relative plate motion. (3) Higher velocities at the boundaries of the model would result in greater slip rate on the MMF. To quantify the effect of the uncertainties of the model parameters on the MMF slip rate we calculate a misfit m of the modelled interseismic velocities (locked-fault model) and the GPS data using the definition where m = i v v GPS mod i v + v GPS i mod v and v denote GPS velocities and the modelled interseismic horizontal velocities, GPS mod respectively. In the following we discuss the results of the aforementioned three possibilities to increase the MMF slip rate. (1) Uncertainties of the Young s modulus and of the coefficient of friction Both, increased Young s modulus E and decreased coefficient of friction µ lead to less internal deformation. For µ =0 the MMF slip rate increases by 0-2 since slip is facilitated (Suppl. Fig. 4a). We tested doubled Young s modulus compared to the values listed in Supplementary Table 1, which leads to less internal deformation due to greater rock stiffness. The MMF slip rate increases by 1 (Suppl. Fig. 4b). The corresponding velocity fields are almost unchanged compared to the reference model in Fig. 3a. The velocity misfit (m=0.12 for the model presented in Fig. 3a) becomes little worse for µ =0 (m=0.13) and is unchanged for doubled Young s modulus (m=0.12). Notably, µ =0 and doubled Young s modulus represent end-member cases since this would imply completely frictionless faults and much greater seismic velocities than observed. (2) Reduced fault complexity Were we to neglect some of the second order faults, the maximum possible increase of the MMF slip rate would be to add the slip that is taken up by these smaller faults. However, the faults besides the MMF are seismically active 22,26,27,28,29. Thus, they contribute to relative plate motion in expense of slip on the MMF since there is no evidence for left-lateral slip in the region. Moreover, inactive secondary faults would neither produce the sharp rims of the bathymetric depressions in the Marmara Trough nor the observed vertical offsets in sedimentary strata in seismic profiles across these faults 6,15. nature geoscience 5
6 supplementary information doi: /ngeO739 (3) Uncertainties of the boundary conditions Even though the applied boundary conditions are taken from the best-fit regional model, they have uncertainties in the order of 10% resulting from the GPS data that were fitted. We investigated the impact of 10% increased kinematic boundary conditions of the regional model on the MMF slip rate. In response to the increased boundary conditions the slip rate on the MMF increases by 2 (Suppl. Fig. 4c). The misfit decreases slightly to m=0.10. Figures on the left show modelled interseismic velocities (red arrows) in comparison with GPS data 5 (blue arrows, with 2σ uncertainties). Figures on the right show the corresponding right lateral fault slip rates at the surface (Suppl. Fig. 1). 0 Doubled Young s modulus compared to Suppl. Table 1. Increased velocity boundary conditions in the regional model (Suppl. Fig. 2) by 10%. Conclusion of the uncertainty study The analysis of the uncertainties of the model parameters shows that their impact on the MMF slip rate is small in general. We conclude that an upper bound of the MMF slip rate is ~2 greater than the slip rates shown in Fig. 3b, hence ~15-20 depending on 6 nature geoscience 6
7 doi: /ngeo739 supplementary information location along strike of the fault. However, the main conclusions of this study remain unaffected: (1) The upper bound of the MMF slip rate resulting from the uncertainty analysis is still considerably smaller than previously estimated 3,4,5 and would be similar to the slip rate given by reference 2. (2) The variability of the MMF slip rate along strike of the fault is characteristic for all the considered alternative models. (3) Slip on secondary faults and internal deformation in the volume between the faults contribute to relative plate motion. Further details and constraints on the kinematics beneath the Sea of Marmara may be deducible from deformation measurements at the sea floor. Additional references 23. Provost, A.-S., Chéry, J. & Hassani, R. 3D mechanical modeling of the GPS velocity field along the North Anatolian fault, Earth Planet. Sci. Lett. 209, doi: /s x(1003) (2003). 24. Jiménez-Munt, I. & Sabadini, R. The block-like behavior of Anatolia envisaged in the modeled and geodetic strain rates, Geophys. Res. Lett. 29(20), 1978, doi: /2002gl (2002). 25. Savage, J. & Burford, R. Geodetic determination of relative plate motion in Central California. J. Geophys. Res. 78, (1973). 26. Bulut, F., Bohnhoff, M., Ellsworth, W.L., Aktar, M. & Dresen, G., Microseismicity at the North Anatolian Fault into the Sea of Marmara offshore Istanbul, NW Turkey. J. Geophys. Res. 114, B09302, doi: /2008jb (2009). 27. Ambraseys, N.N. & Jackson, J.A. Seismicity of the Sea of Marmara (Turkey) since Geophys. J. Int. 141, F1-F8 (2000). 28. Altınok, Y. & Alpar, B. Marmara Island earthquakes, of 1265 and 1935; Turkey. Nat. Hazards Earth Syst. Sci. 6, (2006). 29. Kürçer, A. et al. The Yenice Gönen active fault (NW Turkey): Active tectonics and palaeoseismology. Tectonophysics 453, (2008). nature geoscience 7
Materials and Methods The deformation within the process zone of a propagating fault can be modeled using an elastic approximation.
Materials and Methods The deformation within the process zone of a propagating fault can be modeled using an elastic approximation. In the process zone, stress amplitudes are poorly determined and much
More informationSurface changes caused by erosion and sedimentation were treated by solving: (2)
GSA DATA REPOSITORY 214279 GUY SIMPSON Model with dynamic faulting and surface processes The model used for the simulations reported in Figures 1-3 of the main text is based on two dimensional (plane strain)
More informationKinematics of the Southern California Fault System Constrained by GPS Measurements
Title Page Kinematics of the Southern California Fault System Constrained by GPS Measurements Brendan Meade and Bradford Hager Three basic questions Large historical earthquakes One basic question How
More informationGround displacement in a fault zone in the presence of asperities
BOLLETTINO DI GEOFISICA TEORICA ED APPLICATA VOL. 40, N. 2, pp. 95-110; JUNE 2000 Ground displacement in a fault zone in the presence of asperities S. SANTINI (1),A.PIOMBO (2) and M. DRAGONI (2) (1) Istituto
More informationThe problem (1/2) GPS velocity fields in plate boundary zones are very smooth. What does this smoothness hide?
Block models The problem (1/2) GPS velocity fields in plate boundary zones are very smooth Figure from Tom Herring, MIT What does this smoothness hide? Continuous deformation? Rigid block motions, with
More informationMeasurements in the Creeping Section of the Central San Andreas Fault
Measurements in the Creeping Section of the Central San Andreas Fault Introduction Duncan Agnew, Andy Michael We propose the PBO instrument, with GPS and borehole strainmeters, the creeping section of
More informationBohnhoff, M., Bulut, F., Dresen, G., Eken, T., Malin, P. E., Aktar, M. (2013): An earthquake gap south of Istanbul. - Nature Communications, 4
Originally published as: Bohnhoff, M., Bulut, F., Dresen, G., Eken, T., Malin, P. E., Aktar, M. (2013): An earthquake gap south of Istanbul. - Nature Communications, 4 DOI: 10.1038/ncomms2999 An earthquake
More informationCoulomb stress changes due to Queensland earthquakes and the implications for seismic risk assessment
Coulomb stress changes due to Queensland earthquakes and the implications for seismic risk assessment Abstract D. Weatherley University of Queensland Coulomb stress change analysis has been applied in
More informationGPS Strain & Earthquakes Unit 5: 2014 South Napa earthquake GPS strain analysis student exercise
GPS Strain & Earthquakes Unit 5: 2014 South Napa earthquake GPS strain analysis student exercise Strain Analysis Introduction Name: The earthquake cycle can be viewed as a process of slow strain accumulation
More informationSUPPLEMENTARY INFORMATION
The major uncertainties in our model predictions arise from the input parameters, which include mantle density models (i.e. seismic tomography and choices about scaling velocities to temperature), crustal
More informationSUPPLEMENTARY INFORMATION
SUPPLEMENTARY INFORMATION Supplementary online material for Bai et al., (2). EHS3D MT data collection Broadband magnetotelluric (MT) data were recorded on profiles P, P2 and P4 in the frequency band -.5
More informationA mechanical model of the San Andreas fault and SAFOD Pilot Hole stress measurements
GEOPHYSICAL RESEARCH LETTERS, VOL. 31, L15S13, doi:10.1029/2004gl019521, 2004 A mechanical model of the San Andreas fault and SAFOD Pilot Hole stress measurements Jean Chéry Laboratoire Dynamique de la
More informationD DAVID PUBLISHING. Deformation of Mild Steel Plate with Linear Cracks due to Horizontal Compression. 1. Introduction
Journal of Control Science and Engineering 1 (2015) 40-47 doi: 10.17265/2328-2231/2015.01.005 D DAVID PUBLISHING Deformation of Mild Steel Plate with Linear Cracks due to Horizontal Compression Mitsuru
More informationFault Specific, Dynamic Rupture Scenarios for Strong Ground Motion Prediction
Fault Specific, Dynamic Rupture Scenarios for Strong Ground Motion Prediction H. Sekiguchi Disaster Prevention Research Institute, Kyoto University, Japan Blank Line 9 pt Y. Kase Active Fault and Earthquake
More informationIZMIT BAY BRIDGE SOUTH APPROACH VIADUCT: SEISMIC DESIGN NEXT TO THE NORTH ANATOLIAN FAULT
Istanbul Bridge Conference August 11-13, 2014 Istanbul, Turkey IZMIT BAY BRIDGE SOUTH APPROACH VIADUCT: SEISMIC DESIGN NEXT TO THE NORTH ANATOLIAN FAULT A. Giannakou 1, J. Chacko 2 and W. Chen 3 ABSTRACT
More informationInvestigation 5: What happens when plates move sideways past each other?
Tectonics Investigation 5: Teacher Guide Investigation 5: What happens when plates move sideways past each other? Plates move sideways past each other at transform boundaries. At these boundaries, the
More informationIzmit earthquake postseismic deformation and dynamics of the North Anatolian Fault Zone
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 114,, doi:10.1029/2008jb006026, 2009 Izmit earthquake postseismic deformation and dynamics of the North Anatolian Fault Zone E. H. Hearn, 1 S. McClusky, 2 S. Ergintav,
More informationLateral extrusion and tectonic escape in Ilan Plain of northeastern Taiwan
Lateral extrusion and tectonic escape in Ilan Plain of northeastern Taiwan Angelier, J., Chang, T.Y., Hu, J.C., Chang, C.P., Siame, L., Lee, J.C., Deffontaines, B., Chu, H.T, Lu, C.Y., Does extrusion occur
More informationAnswers: Internal Processes and Structures (Isostasy)
Answers: Internal Processes and Structures (Isostasy) 1. Analyse the adjustment of the crust to changes in loads associated with volcanism, mountain building, erosion, and glaciation by using the concept
More informationElizabeth H. Hearn modified from W. Behr
Reconciling postseismic and interseismic surface deformation around strike-slip faults: Earthquake-cycle models with finite ruptures and viscous shear zones Elizabeth H. Hearn hearn.liz@gmail.com modified
More information3D MODELING OF EARTHQUAKE CYCLES OF THE XIANSHUIHE FAULT, SOUTHWESTERN CHINA
3D MODELING OF EARTHQUAKE CYCLES OF THE XIANSHUIHE FAULT, SOUTHWESTERN CHINA Li Xiaofan MEE09177 Supervisor: Bunichiro Shibazaki ABSTRACT We perform 3D modeling of earthquake generation of the Xianshuihe
More informationFinite element modelling of fault stress triggering due to hydraulic fracturing
Finite element modelling of fault stress triggering due to hydraulic fracturing Arsalan, Sattari and David, Eaton University of Calgary, Geoscience Department Summary In this study we aim to model fault
More information} based on composition
Learning goals: Predict types of earthquakes that will happen at different plate boundaries based on relative plate motion vector vs. strike (vector subtraction) Understand interseismic and coseismic deformation,
More informationANALYSIS OF SPATIAL AND TEMPORAL VARIATION OF EARTHQUAKE HAZARD PARAMETERS FROM A BAYESIAN APPROACH IN AND AROUND THE MARMARA SEA
ANALYSIS OF SPATIAL AND TEMPORAL VARIATION OF EARTHQUAKE HAZARD PARAMETERS FROM A BAYESIAN APPROACH IN AND AROUND THE MARMARA SEA Y. Bayrak 1, T. Türker 2, E. Bayrak 3 ABSTRACT: 1 Prof Dr. Geophysical
More informationEarthquakes. Earthquakes are caused by a sudden release of energy
Earthquakes Earthquakes are caused by a sudden release of energy The amount of energy released determines the magnitude of the earthquake Seismic waves carry the energy away from its origin Fig. 18.1 Origin
More informationJournal of Geophysical Research Letters Supporting Information for
Journal of Geophysical Research Letters Supporting Information for InSAR observations of strain accumulation and fault creep along the Chaman Fault system, Pakistan and Afghanistan H. Fattahi 1, F. Amelung
More informationTectonic Seismogenic Index of Geothermal Reservoirs
Tectonic Seismogenic Index of Geothermal Reservoirs C. Dinske 1, F. Wenzel 2 and S.A. Shapiro 1 1 Freie Universität Berlin 2 KIT Karlsruhe November 27, 2012 Introduction M max reservoir location -2.0 Barnett
More informationThe Earthquake Cycle Chapter :: n/a
The Earthquake Cycle Chapter :: n/a A German seismogram of the 1906 SF EQ Image courtesy of San Francisco Public Library Stages of the Earthquake Cycle The Earthquake cycle is split into several distinct
More informationTectonics. Lecture 12 Earthquake Faulting GNH7/GG09/GEOL4002 EARTHQUAKE SEISMOLOGY AND EARTHQUAKE HAZARD
Tectonics Lecture 12 Earthquake Faulting Plane strain 3 Strain occurs only in a plane. In the third direction strain is zero. 1 ε 2 = 0 3 2 Assumption of plane strain for faulting e.g., reverse fault:
More informationON NEAR-FIELD GROUND MOTIONS OF NORMAL AND REVERSE FAULTS FROM VIEWPOINT OF DYNAMIC RUPTURE MODEL
1 Best Practices in Physics-based Fault Rupture Models for Seismic Hazard Assessment of Nuclear ON NEAR-FIELD GROUND MOTIONS OF NORMAL AND REVERSE FAULTS FROM VIEWPOINT OF DYNAMIC RUPTURE MODEL Hideo AOCHI
More informationRegional Geodesy. Shimon Wdowinski. MARGINS-RCL Workshop Lithospheric Rupture in the Gulf of California Salton Trough Region. University of Miami
MARGINS-RCL Workshop Lithospheric Rupture in the Gulf of California Salton Trough Region Regional Geodesy Shimon Wdowinski University of Miami Rowena Lohman, Kim Outerbridge, Tom Rockwell, and Gina Schmalze
More informationoverlie the seismogenic zone offshore Costa Rica, making the margin particularly well suited for combined land and ocean geophysical studies (Figure
Chapter 1 Introduction Historically, highly destructive large magnitude (M w >7.0) underthrusting earthquakes nucleate along the shallow segment of subduction zone megathrust fault, and this region of
More information3D Finite Element Modeling of fault-slip triggering caused by porepressure
3D Finite Element Modeling of fault-slip triggering caused by porepressure changes Arsalan Sattari and David W. Eaton Department of Geoscience, University of Calgary Suary We present a 3D model using a
More informationRole of lithological layering on spatial variation of natural and induced fractures in hydraulic fracture stimulation
Role of lithological layering on spatial variation of natural and induced fractures in hydraulic fracture stimulation Vincent Roche *, Department of Physics, University of Alberta, Edmonton roche@ualberta.ca
More informationCOULOMB STRESS CHANGES DUE TO RECENT ACEH EARTHQUAKES
COULOMB STRESS CHANGES DUE TO RECENT ACEH EARTHQUAKES Madlazim Physics Department, Faculty Mathematics and Sciences of Surabaya State University (UNESA) Jl. Ketintang, Surabaya 60231, Indonesia. e-mail:
More informationGlobal geophysics and wave propagation
Global geophysics and wave propagation Reading: Fowler p76 83 Remote sensing Geophysical methods Seismology Gravity and bathymetry Magnetics Heat flow Seismology: Directly samples the physical properties
More informationMethods of Interpreting Ground Stress Based on Underground Stress Measurements and Numerical Modelling
University of Wollongong Research Online Coal Operators' Conference Faculty of Engineering and Information Sciences 2006 Methods of Interpreting Ground Stress Based on Underground Stress Measurements and
More informationPredicted reversal and recovery of surface creep on the Hayward fault following the 1906 San Francisco earthquake
GEOPHYSICAL RESEARCH LETTERS, VOL. 35, L19305, doi:10.1029/2008gl035270, 2008 Predicted reversal and recovery of surface creep on the Hayward fault following the 1906 San Francisco earthquake D. A. Schmidt
More informationSynthetic Seismicity Models of Multiple Interacting Faults
Synthetic Seismicity Models of Multiple Interacting Faults Russell Robinson and Rafael Benites Institute of Geological & Nuclear Sciences, Box 30368, Lower Hutt, New Zealand (email: r.robinson@gns.cri.nz).
More informationElastic Rebound Theory
Earthquakes Elastic Rebound Theory Earthquakes occur when strain exceeds the strength of the rock and the rock fractures. The arrival of earthquakes waves is recorded by a seismograph. The amplitude of
More informationTectonic stress field in rift systems a comparison of Rhinegraben, Baikal Rift and East African Rift
Tectonic stress field in rift systems a comparison of Rhinegraben, Baikal Rift and East African Rift Barth, Andreas (1), Delvaux, Damien (2), Wenzel, Friedemann (3) 1) Karlsruhe Institute of Technology,
More informationSupplementary Material
1 Supplementary Material 2 3 4 Interseismic, megathrust earthquakes and seismic swarms along the Chilean subduction zone (38-18 S) 5 6 7 8 9 11 12 13 14 1 GPS data set We combined in a single data set
More informationBlind fault Configuration in Osaka, Japan based on 2D gravity inversion
Blind fault Configuration in Osaka, Japan based on 2D gravity inversion N. Inoue & N. Kitada Geo-research Institute, Osaka, Japan K. Takemura Institute for Geothermal Sciences, Kyoto University, Beppu,
More informationto: Interseismic strain accumulation and the earthquake potential on the southern San
Supplementary material to: Interseismic strain accumulation and the earthquake potential on the southern San Andreas fault system by Yuri Fialko Methods The San Bernardino-Coachella Valley segment of the
More informationSubduction zones are complex plate boundaries in which variable geometry and structure can be
1 Chapter 1 Introduction Subduction zones are complex plate boundaries in which variable geometry and structure can be seismically observed. The along-strike transition from flat to normal subduction is
More informationNEW ZEALAND EARTHQUAKES AND PLATE
87 NEW ZEALAND EARTHQUAKES AND PLATE TECTONIC THEORY R.I. Walcott * ABSTRACT The rates and direction of shear strain from geodetic data and the direction of slip from earthquake mechanism studies in New
More informationAfterslip and viscoelastic relaxation following the 1999 M 7.4 İzmit earthquake from GPS measurements
Geophys. J. Int. (2009) doi: 10.1111/j.1365-246X.2009.04228.x Afterslip and viscoelastic relaxation following the 1999 M 7.4 İzmit earthquake from GPS measurements L. Wang, 1,2 R. Wang, 1 F. Roth, 1 B.
More informationCase Study 1: 2014 Chiang Rai Sequence
Case Study 1: 2014 Chiang Rai Sequence Overview Mw 6.1 earthquake on 5 May 2014 at 11:08:43 UTC Largest recorded earthquake in Thailand Fault Orientation How does the orientation of the fault affect the
More informationBasics of the modelling of the ground deformations produced by an earthquake. EO Summer School 2014 Frascati August 13 Pierre Briole
Basics of the modelling of the ground deformations produced by an earthquake EO Summer School 2014 Frascati August 13 Pierre Briole Content Earthquakes and faults Examples of SAR interferograms of earthquakes
More informationDevelopment of a Predictive Simulation System for Crustal Activities in and around Japan - II
Development of a Predictive Simulation System for Crustal Activities in and around Japan - II Project Representative Mitsuhiro Matsu'ura Graduate School of Science, The University of Tokyo Authors Mitsuhiro
More informationIN-SITU STRESS ESTIMATION IN OFFSHORE EASTERN MEDITERRANEAN WITH FINITE ELEMENT ANALYSIS
8 th GRACM International Congress on Computational Mechanics Volos, 12 July 15 July 2015 IN-SITU STRESS ESTIMATION IN OFFSHORE EASTERN MEDITERRANEAN WITH FINITE ELEMENT ANALYSIS Anna Kyriacou 1, Panos
More informationOriginally published as:
Originally published as: Lorenzo Martín, F., Wang, R., Roth, F. (2002): The effect of input parameters on visco-elastic models of crustal deformation. - Física de la Tierra, 14, 33-54 The effect of input
More informationMain Means of Rock Stress Measurement
Real Stress Distributions through Sedimentary Strata and Implications for Reservoir Development and Potential Gas and Coal Development Strategies Ian Gray Sigra Pty Ltd 93 Colebard St West, Acacia Ridge,
More informationStudy megathrust creep to understand megathrust earthquakes
1 Study megathrust creep to understand megathrust earthquakes Kelin Wang Pacific Geoscience Centre, Geological Survey of Canada, kelin.wang@canada.ca Introduction Once upon a time, there was a belief that
More informationTensor character of pore pressure/stress coupling in reservoir depletion and injection
Tensor character of pore pressure/stress coupling in reservoir depletion and injection Müller, B., Altmann, J.B., Müller, T.M., Weißhardt, A., Shapiro, S., Schilling, F.R., Heidbach, O. Geophysical Institute
More informationEffect of an outer-rise earthquake on seismic cycle of large interplate earthquakes estimated from an instability model based on friction mechanics
Effect of an outer-rise earthquake on seismic cycle of large interplate earthquakes estimated from an instability model based on friction mechanics Naoyuki Kato (1) and Tomowo Hirasawa (2) (1) Geological
More informationData Repository Hampel et al., page 1/5
GSA DATA REPOSITORY 2138 Data Repositor Hampel et al., page 1/5 SETUP OF THE FINITE-ELEMENT MODEL The finite-element models were created with the software ABAQUS and consist of a 1-km-thick lithosphere,
More informationEffect Of The In-Situ Stress Field On Casing Failure *
Effect Of The In-Situ Stress Field On Casing Failure * Tang Bo Southwest Petroleum Institute, People's Republic of China Lian Zhanghua Southwest Petroleum Institute, People's Republic of China Abstract
More informationNumerical modeling of strike-slip creeping faults and implications for the Hayward fault, California
Tectonophysics 361 (2003) 121 137 www.elsevier.com/locate/tecto Numerical modeling of strike-slip creeping faults and implications for the Hayward fault, California R. Malservisi*, C. Gans, K.P. Furlong
More informationIntroduction to Displacement Modeling
Introduction to Displacement Modeling Introduction Deformation on the Earth surface informs us about processes and material properties below surface Observation tools: GPS (static-dynamic) InSAR (static)
More informationEarthquakes in Barcelonnette!
Barcelonnette in the Ubaye valley : the landscape results of large deformations during the alpine orogene (40 5 Myr in this area) and the succession of Quaternary glaciations. The sedimentary rocks are
More informationModelling Subduction Zone Seismogenic Hazards in Southeast Asia for Seismic Hazard Assessments
Modelling Subduction Zone Seismogenic Hazards in Southeast Asia for Seismic Hazard Assessments Vicki-Ann Dimas 1,2 and Gary Gibson 3 1. Corresponding Author. Seismic Hazard Analyst, Seismology Research
More informationFocused Observation of the San Andreas/Calaveras Fault intersection in the region of San Juan Bautista, California
Focused Observation of the San Andreas/Calaveras Fault intersection in the region of San Juan Bautista, California Clifford Thurber, Dept. of Geology and Geophysics, Univ. Wisconsin-Madison Mick Gladwin,
More information8.0 SUMMARY AND CONCLUSIONS
8.0 SUMMARY AND CONCLUSIONS In November 2008, Pacific Gas and Electric (PG&E) informed the U.S. Nuclear Regulatory Commission (NRC) that preliminary results from the Diablo Canyon Power Plant (DCPP) Long
More informationSeven years of postseismic deformation following the 1999, M = 7.4 and M = 7.2, Izmit-Düzce, Turkey earthquake sequence
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 114,, doi:10.1029/2008jb006021, 2009 Seven years of postseismic deformation following the 1999, M = 7.4 and M = 7.2, Izmit-Düzce, Turkey earthquake sequence S. Ergintav,
More informationToday: Basic regional framework. Western U.S. setting Eastern California Shear Zone (ECSZ) 1992 Landers EQ 1999 Hector Mine EQ Fault structure
Today: Basic regional framework Western U.S. setting Eastern California Shear Zone (ECSZ) 1992 Landers EQ 1999 Hector Mine EQ Fault structure 1 2 Mojave and Southern Basin and Range - distribution of strike-slip
More informationStructural Style and Tectonic Evolution of the Nakhon Basin, Gulf of Thailand
Structural Style and Tectonic Evolution of the Nakhon Basin, Gulf of Thailand Piyaphong Chenrai Petroleum Geoscience Program, Department of Geology, Faculty of Science, Chulalongkorn University, Bangkok
More informationExploring Site Response in the Taipei Basin with 2D and 3D Numerical Simulations
Exploring Site Response in the Taipei Basin with 2D and 3D Numerical Simulations J. Miksat1, K.-L. Wen2, Ch.-T. Chen.2, V. Sokolov1 and F. Wenzel1 1 Geophysical Institute, Karlsruhe University, Hertzstr.
More informationEarthquake and Volcano Clustering at Mono Basin (California)
Excerpt from the Proceedings of the COMSOL Conference 2010 Paris Earthquake and Volcano Clustering at Mono Basin (California) D. La Marra *,1, A. Manconi 2,3 and M. Battaglia 1 1 Dept of Earth Sciences,
More informationMechanics of Earthquakes and Faulting
Mechanics of Earthquakes and Faulting www.geosc.psu.edu/courses/geosc508 Overview Milestones in continuum mechanics Concepts of modulus and stiffness. Stress-strain relations Elasticity Surface and body
More informationGeotechnical Earthquake Engineering Prof. Deepankar Choudhury Department of Civil Engineering Indian Institute of Technology, Bombay
Geotechnical Earthquake Engineering Prof. Deepankar Choudhury Department of Civil Engineering Indian Institute of Technology, Bombay Module - 3 Lecture - 7 Engineering Seismology (Contd ) Let us start
More informationof other regional earthquakes (e.g. Zoback and Zoback, 1980). I also want to find out
4. Focal Mechanism Solutions A way to investigate source properties of the 2001 sequence is to attempt finding well-constrained focal mechanism solutions to determine if they are consistent with those
More informationSlip distributions of the 1944 Tonankai and 1946 Nankai earthquakes including the horizontal movement effect on tsunami generation
Slip distributions of the 1944 Tonankai and 1946 Nankai earthquakes including the horizontal movement effect on tsunami generation Toshitaka Baba Research Program for Plate Dynamics, Institute for Frontier
More informationby west-dipping subduction of the North American Plate
GSA Data Repository 2019133 Supplementary information for Kimberlite magmatism induced by west-dipping subduction of the North American Plate Wenbo Zhang 1*, Stephen T. Johnston 1, and Claire A. Currie
More informationPlate Tectonics. Structure of the Earth
Plate Tectonics Structure of the Earth The Earth can be considered as being made up of a series of concentric spheres, each made up of materials that differ in terms of composition and mechanical properties.
More informationMegathrust Earthquakes
Megathrust Earthquakes Susan Schwartz University of California Santa Cruz CIDER 2017 UC Berkeley July 5, 2017 The largest megathrust events are not uniformally distributed at all subduction zones. M>8
More informationEarthquakes. Earthquake Magnitudes 10/1/2013. Environmental Geology Chapter 8 Earthquakes and Related Phenomena
Environmental Geology Chapter 8 Earthquakes and Related Phenomena Fall 2013 Northridge 1994 Kobe 1995 Mexico City 1985 China 2008 Earthquakes Earthquake Magnitudes Earthquake Magnitudes Richter Magnitude
More information7. Armutlu - A Key Region to Understand the Evolution of Seismicity at the Western End of the 1999 Izmit Earthquake Rupture
7. Armutlu - A Key Region to Understand the Evolution of Seismicity at the Western End of the 1999 Izmit Earthquake Rupture Bari,. 1, S. Sandberg 2, H. Grosser 2, S. Irmak 1, H. Woith 2, M. F. Özer 1,
More informationRecent GNSS Developments and Reference Frame Issues in Turkey. Onur LENK and Bahadir AKTUĞ
Recent GNSS Developments and Reference Frame Issues in Turkey Onur LENK and Bahadir AKTUĞ General Command of Mapping onur.lenk lenk@hgk.mil.tr 1/31 GPS STUDIES İN TURKEY date back to early 1990s geodynamics-oriented
More information2008 Monitoring Research Review: Ground-Based Nuclear Explosion Monitoring Technologies
STRUCTURE OF THE KOREAN PENINSULA FROM WAVEFORM TRAVEL-TIME ANALYSIS Roland Gritto 1, Jacob E. Siegel 1, and Winston W. Chan 2 Array Information Technology 1 and Harris Corporation 2 Sponsored by Air Force
More informationHomogeneous vs. realistic heterogeneous material-properties in subduction zone models: Coseismic and postseismic deformation
Homogeneous vs. realistic heterogeneous material-properties in subduction zone models: Coseismic and postseismic deformation T. Masterlark 1, C. DeMets 2, H.F. Wang 2, O. S nchez 3, and J. Stock 4 1 US
More informationSummary so far. Geological structures Earthquakes and their mechanisms Continuous versus block-like behavior Link with dynamics?
Summary so far Geodetic measurements velocities velocity gradient tensor (spatial derivatives of velocity) Velocity gradient tensor = strain rate (sym.) + rotation rate (antisym.) Strain rate tensor can
More informationEmpirical Green s Function Analysis of the Wells, Nevada, Earthquake Source
Nevada Bureau of Mines and Geology Special Publication 36 Empirical Green s Function Analysis of the Wells, Nevada, Earthquake Source by Mendoza, C. 1 and Hartzell S. 2 1 Centro de Geociencias, Universidad
More informationActivity Pacific Northwest Tectonic Block Model
Activity Pacific Northwest Tectonic Block Model The Cascadia tectonic margin is caught between several tectonic forces, during the relentless motions of the giant Pacific Plate, the smaller subducting
More informationSimulations in the Los Angeles Basin
83 Chapter 4 Simulations in the Los Angeles Basin This chapter reports the responses of steel moment-resisting frame (MRF) buildings to simulated earthquakes in the Los Angeles basin. I use broadband ground
More informationThe Harvard community has made this article openly available. Please share how this access benefits you. Your story matters
Estimates of Seismic Potential in the Marmara Sea Region from Block Models of Secular Deformation Constrained by Global Positioning System Measurements The Harvard community has made this article openly
More informationJack Loveless Department of Geosciences Smith College
Geodetic constraints on fault interactions and stressing rates in southern California Jack Loveless Department of Geosciences Smith College jloveless@smith.edu Brendan Meade Department of Earth & Planetary
More informationNumerical simulation of seismic cycles at a subduction zone with a laboratory-derived friction law
Numerical simulation of seismic cycles at a subduction zone with a laboratory-derived friction law Naoyuki Kato (1), Kazuro Hirahara (2) and Mikio Iizuka (3) (1) Earthquake Research Institute, University
More informationCrags, Cracks, and Crumples: Crustal Deformation and Mountain Building
Crags, Cracks, and Crumples: Crustal Deformation and Mountain Building Updated by: Rick Oches, Professor of Geology & Environmental Sciences Bentley University Waltham, Massachusetts Based on slides prepared
More informationInfluence of material contrast on fault branching behavior
GEOPHYSICAL RESEARCH LETTERS, VOL. 38,, doi:10.1029/2011gl047849, 2011 Influence of material contrast on fault branching behavior Nora DeDontney, 1 James R. Rice, 1,2 and Renata Dmowska 2 Received 20 April
More informationImportant information from Chapter 1
Important information from Chapter 1 Distinguish between: Natural hazard // Disaster // Catastrophe What role does human population play in these categories? Know how to read a Hazard Map, such as Figure
More informationSupplementary information on the West African margin
Huismans and Beaumont 1 Data repository Supplementary information on the West African margin Interpreted seismic cross-sections of the north Angolan to south Gabon west African passive margins 1-3, including
More informationFigure 1 shows a sketch of loading conditions and sample geometry of the employed Westerly
Supplementary Information: Off-fault damage and acoustic emission distributions during the evolution of structurally-complex faults over series of stick-slip events T. H. W. Goebel 1*, T. W. Becker 1,
More informationBonn, Germany MOUTAZ DALATI. General Organization for Remote Sensing ( GORS ), Syria Advisor to the General Director of GORS,
Bonn, Germany Early Warning System is needed for Earthquakes disaster mitigation in Syria Case Study: Detecting and Monitoring the Active faulting zones along the Afro-Arabian-Syrian Rift System MOUTAZ
More information1. classic definition = study of deformed rocks in the upper crust
Structural Geology I. Introduction 1. classic definition = study of deformed rocks in the upper crust deformed includes translation, rotation, and strain (change of shape) All rocks are deformed in some
More informationREGIONAL CHARACTERISTICS OF STRESS FIELD AND ITS DYNAMICS IN AND AROUND THE NANKAI TROUGH, JAPAN
46 4 2003 7 CHINESE JOURNAL OF GEOPHYSICS Vol. 46, No. 4 July, 2003 1 1 2 3 1, 100037 2, 920-1192 3, 237-0061,,, : -. (10 22 ), (60 85km) ; (40 ), (160km)..,. GPS,, -,,.,,,.. 0001-5733(2003) 04-0488 -
More informationSeismic interaction and delayed triggering along the North Anatolian Fault
GEOPHYSICAL RESEARCH LETTERS, VOL. 37,, doi:10.1029/2010gl044688, 2010 Seismic interaction and delayed triggering along the North Anatolian Fault V. Durand, 1,2 M. Bouchon, 1 H. Karabulut, 3 D. Marsan,
More informationCritical Borehole Orientations Rock Mechanics Aspects
Critical Borehole Orientations Rock Mechanics Aspects By R. BRAUN* Abstract This article discusses rock mechanics aspects of the relationship between borehole stability and borehole orientation. Two kinds
More informationOverview of the Seismic Source Characterization for the Palo Verde Nuclear Generating Station
Overview of the Seismic Source Characterization for the Palo Verde Nuclear Generating Station Scott Lindvall SSC TI Team Lead Palo Verde SSC SSHAC Level 3 Project Tuesday, March 19, 2013 1 Questions from
More informationGPS study of N-S trending Karaburun Belt (Turkey) and its E-W trending eastern part
Presented at the FIG Working Week 2017, GPS study of N-S trending Karaburun Belt (Turkey) and its E-W trending eastern part May 29 - June 2, 2017 in Helsinki, Finland Muzaffer KAHVECİ Selcuk University,
More information