Carrizo Plain overdue for major quake
August 21, 2010
Earthquakes strike the Carrizo Plain portion of the San Andreas Fault 
more often than previously thought, according to a study by researchers at the University of California, Irvine and Arizona State. [MSMBC]
Researchers examined earthquake activity and reoccurrence rates along the Carrizo Plain part of the San Andreas Fault for the past 700 years. They discovered that large earthquakes occur more frequently than previously reported, as often as every 45 to 144 years.
Even so, the last big quake, a magnitude 7.9, struck in 1857, more than 150 years ago.
Researchers said it is possible that the fault is experiencing a natural lull, but more likely that a major earthquake will happen soon.
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