Cali quake storm - hmmm.

"A "swarm", or series, of earthquakes, most of them small, has taken place this late March in Southern California along the infamous San Andreas Fault Zone. While none has been severe, the earthquake swarm raises interesting questions in a region that is always bracing for the "big one"; that is, a catastrophic shake effecting lives and property of millions.
A swarm of earthquakes has been defined as "a series of minor earthquakes, none of which may be identified as the mainshock, occurring in a limited area and time. ". This swarm began on March 21st, 2009, beneath the floor of the Salton Sea off Bombay Beach, California. The swarm continued through at least March 24. Strongest of the tremors was a Magnitude 4.8 shake that happened on the 23d with an epicenter about two and one-half miles south of Bombay Beach. While the M4.8 quake was widely felt, by far most of the quakes had magnitudes below M2.0 meaning that they were unlikely to be felt by most (if not all) people. Focal depth, which represents the starting point within the earth of the rupture triggering the shaking, was mostly between 2 and 5 miles underground. "
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