The earthquake "lull" of recent years is over. The dramatic upsurge in the number of "giant" earthquakes this year, seismologists say, could indicate a return to a "more normal" higher level of global seismic activity than has been the case during the past decade and a half. "The last 15 years or so have been unusually quiet in terms of large and giant earthquakes." says Dr. Don L. Anderson, director of Caltech's Seismological Laboratory in Pasadena, California. He notes that during that period there were only four "giant" (S.O or higher on the Richter scale) earthquakes - an average of one every three or four years.
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