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Mysterious tremors detected on San Andreas Fault
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[quote:AlasBabylon:MV8xNDA3NDQyXzIzMTY3OTg5XzQwQzc1Qzg5] [quote:Anonymous Coward 11275] What's mysterious about it? It's the San Andreas Fault! [/quote] That's what I want to know ?? ? [/quote]
Original Message
Scientists have detected a spike in underground rumblings on a section of California's San Andreas Fault that produced a magnitude-7.8 earthquake in 1857.
What these mysterious vibrations say about future earthquakes is far from certain. But some think the deep tremors suggest underground stress may be building up faster than expected and may indicate an increased risk of a major temblor.
Researchers at the University of California, Berkeley, monitored seismic activity on the fault's central section between July 2001 and February 2009 and recorded more than 2,000 tremors. The tremors lasted mere minutes to nearly half an hour.
Unlike earthquakes, tremors occur deeper below the surface and the shaking lasts longer.
During the study period, two strong earthquakes hit — a magnitude-6.5 in 2003 and a magnitude-6.0 a year later. Scientists noticed the frequency of the tremors
doubled after the 2003 quake and jumped six-fold after 2004
.
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This shit going to rock us So-Cal folks.. Breaking out the raft!!
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