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Is this your fault?

The California Geological Survey has released NEW maps of ALL of the earthquake zones in California. A lot of NEW faults were added to the earlier map (constructed in 1964), and some of the faults that were shown on the earlier map were MOVED.

A little bit of GOOD news: a few faults that were shown on the earlier map for the Bay Area were REMOVED, since they really don’t exist :-)  (and were mapped by mistake) or because they are inactive.

Utilities can use the maps to determine, for example, where NOT to build dams. :-) Ordinary people might want to use the maps to determine where they would like to live. :-)

The 2010 California Geologic Map is HERE.

The 2010 Fault Activity Map of California is HERE.


-Bill at

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