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PSHA Map Index
Probabilistic ground
shaking (Peak Ground Acceleration [PGA],
10% probability of being exceeded in
50 years, assuming a uniform soft rock
site condition) contour maps have been
developed for all 1 degree by 2 degree
areas of California. Click below on the
area desired to view the more detailed
map. (Files are 5KB to 19 KB.)
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The California
Department of Conservation's California
Geological Survey has generated several
different types of seismic hazard maps
such as the one displayed above in
cooperation with the
U.S. Geological
Survey. These maps typically indicate
the probability of exceeding various
levels of ground shaking during
different time periods and for different
soil conditions. The seismic hazard maps
form the basis for building codes,
mitigation strategies, loss models, and
seismic hazard zones. |