Evidence for Two Surface Ruptures in the Past 500 Years on the San Andreas Fault at Frazier Mountain, California
We conducted paleoseismic studies in a closed depression along the San Andreas fault on the north flank of Frazier Mountain near Frazier Park, California. We recognized two earthquake ruptures in our trench exposure and interpreted the most recent rupture, event 1, to represent the historical 1857 earthquake. We also exposed evidence of an earlier surface rupture, event 2, along an older group of faults that did not rerupture during event 1.
Lindvall, S.C., Rockwell, T.K., Dawson, T.E., Helms, J.G., and Bowman, K.W., 2002, Evidence for two surface ruptures in the past 500 years on the San Andreas fault at Frazier Mountain, California: Bulletin of the Seismological Society of America, v. 92, p. 2689-2703.
The Forest Service will host its remaining two public meetings in Queen Valley on October 8 and in Tempe on October 10.
Video & Materials
A video presentation – the same information introduced at each public meeting – as well as meeting materials (posters and newsletter) are available for public review.
Draft EIS Released
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