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Detailed Reference Information |
Nadeau, R.M., Michelini, A., Uhrhammer, R.A., Dolenc, D. and McEvilly, T.V. (2004). Detailed kinematics, structure and recurrence of micro-seismicity in the SAFOD target region. Geophysical Research Letters 31: doi: 10.1029/2003GL019409. issn: 0094-8276. |
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Large numbers of small earthquakes recorded over 2 decades and analyzed with advanced techniques are used to characterize the detailed kinematics, structure and recurrence interval scaling properties of micro-seismicity in a 4 ¿ 4 km lateral and 6 km deep crustal volume encompassing the region of the SAFOD deep drilling experiment. The characterization reveals that the seismically active San Andreas fault in the vicinity of SAFOD's repeating magnitude 2 target earthquakes is composed of two sub-parallel fault strands that are creeping at comparable rates and that one of the strands lies between the SAFOD drilling platform and SAFOD's target events. In the region, ~55% of the earthquakes are members of 52 characteristically repeating earthquake sequences. The recurrence intervals of the repeating target events are consistent with the interval scaling of the other sequences. However this scaling is contrary to that expected from standard constant stress-drop theory. |
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Abstract |
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Keywords
Seismology, Earthquake dynamics and mechanics, Seismology, Earthquake parameters, Seismology, Seismicity and seismotectonics, Tectonophysics, Plate motions—present and recent |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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