It's not ALL Southern California's fault

[MarkBC]

ski3pin posted the piece on southern California faulting...here's a different angle on, and location, of California seismicity:

Depletion of Central Valley's groundwater may be causing earthquakes

in today's Los Angeles Times

 

[Foy]

The problem of subsidence in the San Joaquin Valley was pronounced enough to make the undergraduate geology textbooks in the early 1970s. At that time, a comprehensive survey indicated subsidence of > 1 foot affecting an area of > 5,200 square miles within the Valley, around half of the Valley's irrigable land, according to the USGS. An area near Mendota had subsided 28 feet.

The flooding of Lake Lanier, formed by damming the Chatahoochee River north of Atlanta, brought about induced seismicity as the weight of the water caused movement on pre-existing fractures and faults.

Foy

 

[ski3pin]

Interesting stuff, thanks!