 Volkan SevilgenAssociate
Contact Info
Short Biography
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I work as a USGS contractor. My research is based on development of Coulomb Stress Software and Coulomb analyses of recent earthquakes. Coulomb 3 software is designed to investigate Coulomb stress changes on mapped faults and earthquake nodal planes, and is intended both for publication-directed research and for university teaching and instruction.
One can calculate static displacements (on any surface or at GPS stations), strains, and stresses caused by fault slip, magmatic intrusion or dike expansion. Problems such as how an earthquake promotes or inhibits failure on nearby faults, or how fault slip or dike expansion will compress a nearby magma chamber, are germane to Coulomb. Geologic deformation associated with strike-slip faults, normal faults, or fault-bend folds is also a useful application. Calculations are made in an elastic halfspace with uniform isotropic elastic properties following Okada [1992].
7 April 2011 NPR interview on Tohoku Earthquake
I also design and maintain our USGS Research Group, Coulomb Software, Team Tokyo and the first version of the Global Earthquake Model (GEM) web sites. These websites are designed to serve both the public and the scientific community. They include technical and non-technical summaries of our research, our published reports, press articles about our work, and materials for students and teachers at high schools and universities.
Volkan's YouTube Channel
Coulomb Training Video (Total 6 Hours) Part 1, Part 2, Part 3, Part 4
Quake Towers Compare reinfored and non-reinforced buildings against earthquakes
http://seismicity.net
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PublicationsSevilgen, V., R.S. Stein, and F.F. Pollitz, 2012, Stress imparted by the great 2004 Sumatra earthquake shut down transforms and activated rifts up to 400 km away in the Andaman Sea, Proc Natl Acad Sci USA, doi: 10.1073/pnas.1208799109 [includes animation] [Link]Pollitz, F.F., R.S. Stein, V. Sevilgen, R. Bürgmann, 2012, The 11 April 2012 M=8.6 East Indian Ocean earthquake triggered large aftershocks worldwide, Nature, doi: 10.1038/nature11504 [Link] Toda, S. Stein, R., Sevilgen, V., Lin, J., 2011. Coulomb 3.3 Graphic-rich deformation and stress-change software for earthquake, tectonic, and volcano research and teaching-user guide. U.S. Geological Survey Open-File Report 2011-1060, ix, 54 p.; 9 Chapters [Link]
Lin, J, R.S. Stein, V. Sevilgen, and S. Toda,
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USGS–WHOI–DPRI Coulomb Stress-Transfer Model for the January 12, 2010, MW=7.0 Haiti Earthquake, U.S. Geol. Surv. Open-File Rep. 2010-1019, 8 pp., 2010.
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[Online Article]
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V. Sevilgen, R.S. Stein,
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Search for response of seismicity to static and dynamic stresses imparted by the 1999 M=7.4 Izmit and M=7.1 Duzce, Turkey, earthquakes: Seismicity rate rapidly decayed at Izmit but remains high at Duzce; remote dynamic effects not detected, Eos Trans. AGU, 90(52), Fall Meet. Suppl., Abstract S51C-1450, 2009
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Sevilgen, V.
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Coulomb Stress Analysis of the 21 February 2008 Mw= 6.0 Wells, Nevada, Earthquake, Nevada Seismological Laboratory, 2008 Wells Earthquake Special Volume, 2008
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[Printable article (0.6 Mb)]
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Sevilgen, V.
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Coulomb Stress Analysis of the 21 February 2008 Mw= 6.0 Wells, Nevada, Earthquake, Eos Trans. AGU, 89(52), Fall Meet. Suppl., Abstract S51B-1746, 2008
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[Printable poster (9.2 Mb)]
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Hauksson, E., Felzer, K., Given, D., Giveon, M., Hough, S., Hutton, K., Kanamori, H., Sevilgen, V., Wei, S., and Yong, A.
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Preliminary report on the 29 July 2008 Mw5.4 Chino Hills, Eastern Los Angeles basin, California, earthquake sequence, 79, 6, 10.1785/gssrl.79.6.855, SRL, 2008
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[Printable article (3.3 Mb)]
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Toda, S., Stein, R.S., Lin, J., and Sevilgen, V.
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Coulomb 3.1 User's Guide, 2008
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[Coulomb Website]
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V. Sevilgen
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Coulomb Stress Analysis for 29 July 2008 Mw= 5.4 Chino Hills, California Earthquake, 8/5/08
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[Printable article (1.6 Mb)]
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V. Sevilgen
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Coulomb Stress Analysis for 21 February 2008 Mw= 6.0 Wells, Nevada Earthquake, 4/17/08
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[Printable article (1.6 Mb)]
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V. Sevilgen
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Coulomb Stress Analysis for Mw= 5.4 Alum Rock Earthquake, 11/20/07
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[Online Seminar Video (Volkan Sevilgen's part starts at 54 min.)]
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Carton, H., S. C. Singh, A. Hirn, S. Bazin, B. de Voogd, A. Vigner, A. Ricolleau, S. Cetin, N. Oçakoglu, F. Karakoç, and V. Sevilgen
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Seismic imaging of the three-dimensional architecture of the Çinarcik Basin along the North Anatolian Fault, J. Geophys. Res., 112, B06101, doi:10.1029/2006JB004548
21 June 2007
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[Printable article (3 Mb)]
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Toda, S., Stein, R.S., Lin, J., and Sevilgen, V.
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Coulomb Teaching, Apr 29-30, Aug 9, Sep 9, Dec 8 and 15, 2007
Coulomb Class Video Dec 8, 2007 (4 parts 5 hours 37 min total)
[Coulomb Class Video Part 1]
[Coulomb Class Video Part 2]
[Coulomb Class Video Part 3]
[Coulomb Class Video Part 4]
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Toda, S., Lin, J., Sevilgen, V. and Stein, R.S.
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Coulomb 3.0, an Interactive Tool for Studying Earthquake Interactions,poster, Statistical Seismology: Physical and Stochastic Modelling of Earthquake Occurrence and Forecasting, “Ettore Majorana" Foundation and Centre for Scientific Culture, 2007
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Toda, S., Lin, J., Sevilgen, V. and Stein, R.S.
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Coulomb 3.0, an interactive tool for studying earthquake interactions,conference talk at, 2007 annual meeting of Seismological Society of America, Kona, Hawaii, USA, April 2007.
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V. Sevilgen, H. Eyidogan,
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Calculation of the Earthquake Intensity via the Internet, poster, 17th International Geophysical Congress & Exibition by CGET, 2006.
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[Printable poster (1.8 Mb)]
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V. Sevilgen,
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Calculation Earthquake Intensity Distribution via the Internet, MSc. Thesis, Istanbul Technical University, Dept. of Geophysical Engineering, 2006.
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[Project website]
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V. Sevilgen,
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A New Aproach to Determine Earthquake Intensity Distribution, BSc. Thesis, Istanbul Technical University, Dept. of Geophysical Engineering, 2003.
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S. Singh, A. Hirn, S. Basin, B. Voogd, A. Vigner, A. Ricolleau, S. Cetin, N. Ocakoglu, F. Karakoy and V. Sevilgen
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Seismarmara Draft Cruise Report Leg 2, prepared by S. Singh, 2001.
My Science Topics
My USGS Science Strategy AreasA National Hazard, Risk, and Resilience Assessment Program
| Earthquake stress interactionsMy research focuses upon how earthquakes interact through the transfer of stress. Examples of such interaction include the progression of mainshocks along a fault, aftershocks, seismic quiesence, and earthquake clustering. My collaborators and I are interested in how one earthquake can promote subsequent shocks at some sites and inhibit them in others.
Coulomb stress transfer for recent events
11 March 2011 M=9.0 Off-Tohoku stress transfer
Contact InformationVolkan Sevilgen
345 Middlefield Road
Menlo Park, CA 94025-3561
650-329-4803
650-329-5163 - Fax
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U.S. Geological Survey
