New California Geologic and Fault Activity Maps


The California Geological Survey is celebrating its 150th anniversary this year.  This is also the year that the CGS is releasing updated geologic and fault activity maps (read about the history of geologic mapping in California here).  Using Google maps as a base, an overlay is available online for the updated 2010 Geologic Map and the 2010 Fault Activity Map.  The last time the geologic maps was updated was back in 1977 and the fault map in 1994.  This is the fifth update for the geologic map and the fourth for the fault activity map.  No word on when the GIS data will be made available but the CGS page is promising a statement on the two releases “soon.”


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