Quake Shakes San Francisco
When will the big one hit?
Excerpt:
SAN FRANCISCO, Oct. 31 — An earthquake rattled the Bay Area on Tuesday night, and in many ways it was just a pre-Halloween scare that did little damage, injured no one and barely merited a break-in to prime time broadcasting. But for scientists, the 5.6 magnitude quake, which struck just after 8 p.m., set off worries that the tremor could be a precursor of worse to come.
“We have found through experience that when you get an earthquake of this size and larger that it can be followed by a earthquake of the same size or even larger in that area,” said Tom Brocher, a seismologist with the United States Geological Survey in Menlo Park, Calif. “It’s a very low chance of that happening, about a 5 percent chance, but it is a possibility.”
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