We have two small eartquekes before 10 min close to Bakersfield, so I will post one possibility how I see things for possible foreshock ..

For me this area is one of interesting areas to watch also think stronger EQ's in this area around Bakersfield can become foreshocks for the "Big One" ..

Probably EQ of M 5.7 + also stronger, but that's hard to say ..

M 3.2 - 7km WNW of Pine Mountain Club, California 2013-05-16 10:04:58 UTC

M 3.3 - 16km S of Greenfield, California 2013-05-16 10:04:53 UTC

[link to earthquake.usgs.gov]

[link to earthquake.usgs.gov]

More info about possibility for next the "Big One" on San Andreas Fault Line ..

[link to www.google.com]