This map shows the location of faults in California, you can see it is very complicated! If you feel you can get roughly the pattern copy it onto your map:
http://quake.usgs.gov/info/faultmaps/
You need to know the location of San Andreas, a conservative plate boundary, so use this map to label it http://quake.usgs.gov/info/faultmaps/fault207.html
Click on this link for a map showing old earthquakes in California:
http://www.ncedc.org/oldeqs/hist.html
This one is for recent earthquakes, in the last week:
http://quake.usgs.gov/recenteqs/
Wednesday, 2 July 2008
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