Physics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3508304l&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 8, CiteID L08304
Physics
7
Seismology, Seismology: Earthquake Dynamics (1242), Tectonophysics: Dynamics: Seismotectonics
Scientific paper
Highly damaged rocks within the San Andreas fault zone at Parkfield form a low-velocity waveguide for seismic waves, giving rise to fault-guided waves. Prominent fault-guided waves have been observed at the San Andreas Fault Observatory at Depth (SAFOD) site, including a surface array across the fault zone and a borehole seismograph placed in the SAFOD well at a depth of ~2.7 km below ground. The resulting observations are modeled here using 3-D finite-difference methods. To fit the amplitude, frequency, and travel-time characteristics of the data, the models require a downward tapering, 30-40-m wide fault-core embedded in a 100-200-m wide jacket. Compared with the intact wall rocks, the core velocities are reduced by ~40% and jacket velocities by ~25%. Based on the depths of earthquakes generating guided waves, we estimate that the low-velocity waveguide along the fault at SAFOD extends at least to depths of ~7 km, more than twice the depth reported in pervious studies.
Li Yong-Gang
Malin Peter E.
No associations
LandOfFree
San Andreas Fault damage at SAFOD viewed with fault-guided waves does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with San Andreas Fault damage at SAFOD viewed with fault-guided waves, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and San Andreas Fault damage at SAFOD viewed with fault-guided waves will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1342838