Multiscale seismic imaging of the San-Andreas-Fault system

• Applicant: Professor Dr. Stefan Buske
• Subject Area: Geophysics
• Term: from 2008 to 2013
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 65636216

• Final Report Year: 2013

Final Report Abstract

We applied an innovative seismic imaging technique (Fresnel-Volume-Migration) to old industry seismic data in order to map large scale structures of the San Andreas fault system. Compared to previous studies on this reflection data set we were able to produce new seismic images of enhanced resolution and quality that reveal several structures that have not been imaged before. Although we have not been able to image steeply dipping structures at the San Andreas fault we were able to characterize the fault zone as a near vertical structure down to the deep roots of the crust. Our results also resolved tectonic structures within the Coast Ranges southwest of the San Andreas fault and the Great Valley east to the San Andreas fault. We have combined our results not only with previous results of the same data but also with microseismic event and NVT locations as well as results from magnetotelluric studies across the same profile. This yields some new interesting insights into the crustal structure and the dynamics of this major transform plate boundary.

Publications

• Seismic Images of the tremor region at the San-Andreas-Fault system around Cholame (USA). lODP/ICDP Kolloquium Münster 14. - 16. 03. 2011
  Gutjahr, S., Buske, S.
  
• Seismic images of the tremor region at the San-Andreas.Fault system around Cholame. ECU General Assembly, Vienna, Austria, 2011
  Gutjahr, S., Buske, S.
  
• Seismic Images of the Non-Volcanic Tremor Region around Cholame, California, USA. ECU General Assembly, Vienna, Austria, 2012
  Gutjahr, S., Buske, S.
  
• Seismic Images of the tremor region at the San-Andreas-Fault system around Cholame (USA). lODP/ICDP Kolloquium Kiel 07. - 09. 03. 2012
  Gutjahr, S., Buske, S.
  
• Seismische Abbildung des San Andreas Verwerfungssystems und der nichtvulkanischen Tremorregion bei Cholame, Kalifornien, USA. DGG Annual meeting, Hamburg, 2012
  Gutjahr, S., Buske, S.
  
• Reflection Seismic Images Across the San Andreas Fault Zone near Cholame, California. lODP/ICDP Kolloquium Freiberg 25. - 27. 03. 2013
  Gutjahr, S., Buske, S.