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Massive Quake Is Overdue for Southern California

By Hugh CollinsAug 21st 2010 – 3:53PM
USGS / AP

USGS / AP

(Aug. 21) -- New research shows that major earthquakes have struck southern California far more frequently than previously thought -- and the next one could be just around the corner. The study from geologists at the University of California Irvine and Arizona State University showed that massive quakes -- of magnitude...

Background on frequency

Frequency is the number of occurrences of a repeating event per unit time. It is also referred to as temporal frequency.

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