Quasi-static Motions near the San Andreas Fault Zone
نویسندگان
چکیده
منابع مشابه
Weakness of the San Andreas Fault revealed by samples from the active fault zone
Understanding the strength and slip behaviour of tectonic faults is a central problem in earthquake physics and seismichazard assessment1–8. Many major faults, including the San Andreas Fault, are weak compared with the surrounding rock, but the cause of this weakness is debated1. Previous measurements of the frictional strength of San Andreas Fault rocks are too high to explain the observed we...
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[1] We used dense linear seismic arrays across and along the San Andreas Fault (SAF) at Parkfield, California to record fault zone trapped waves generated by explosions and microearthquakes in 2002. Prominent trapped waves appeared at stations close to the SAF main fault trace while some energy was trapped in the north strand at the array site. Observations and 3-D finitedifference simulations ...
متن کاملFine-scale structure of the San Andreas fault zone and location of the SAFOD target earthquakes
[1] We present results from the tomographic analysis of seismic data from the Parkfield area using three different inversion codes. The models provide a consistent view of the complex velocity structure in the vicinity of the San Andreas, including a sharp velocity contrast across the fault. We use the inversion results to assess our confidence in the absolute location accuracy of a potential t...
متن کاملSteep-dip seismic imaging of the shallow San Andreas fault near Parkfield.
Seismic reflection and refraction images illuminate the San Andreas Fault to a depth of 1 kilometer. The prestack depth-migrated reflection image contains near-vertical reflections aligned with the active fault trace. The fault is vertical in the upper 0.5 kilometer, then dips about 70 degrees to the southwest to at least 1 kilometer subsurface. This dip reconciles the difference between the co...
متن کاملSlip along the San Andreas Fault Associated with the Earthquake
_______________________________ 155 Introduction ______________________________ 155 Observations _______________________________ 155 Comparison with 1968 slippage __________________ 157 Similarities ______________________________ 157 Differences ________________________________ 157 Discussion ________________________________ 157 Acknowledgments -_________________________^_ 159 References cited ...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 1976
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.1976.tb06918.x