L.A. 'Big One' Could Come Sooner Than Expected: New Study
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Aug 23, 2010, 5:21:47 PM8/23/10
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to Heavensoon
L.A.
'Big One' Could
Come Sooner Than
Expected: New Study
Strong earthquakes along the San Andreas fault
in southern California are more frequent than
previously thought, so the dreaded "Big
One" could be just around the corner, US
researchers said in a study. University of
California at Irvine and Arizona State
University scientists examined the geological
record stretching back 700 years along the
fault line 160 kilometers (100 miles)
northwest of Los Angeles. They found that
strong earthquakes -- between 6.5 and 7.9
magnitude -- shook the area every 45-144
years, instead of the previously established
250-400 years. Since the last big 7.9
magnitude earthquake struck southern
California in 1857, or 153 years ago,
scientists believe the next "Big
One" could happen at any time. The
scientists on Friday provided an abstract of
their study, which will be published in full
in the September 1 issue of the magazine
Geology. "What we know is for the last
700 years, earthquakes on the southern San
Andreas fault have been much more frequent
than everyone thought," said the study's
lead author Sinan Akciz. "Data presented
here contradict previously published
reports," he added. With 37 million
people living in southern California, chiefly
in the cities of Los Angeles, San Diego and
Anaheim, a major earthquake could kill between
2,000 and 50,000 people and cause billions of
dollars in damage, scientists said.