Quake swarm rolls on as magnitude-3.2 shakes San Ramon Valley

Still, it was felt as far north as Pittsburg and as far south to Dublin, according to the U.S. Geological Survey.
Seismologists say residents of the area have little to worry about. The Calaveras Fault is simply releasing tension, and the chance for a big quake — one stronger than magnitude 6.7 — is low, about 7 percent within the next 30 years.
“Little earthquakes don’t necessarily influence larger earthquakes,” said Sarah Minson, a seismologist at the geological survey. “This really isn’t unusual, especially for that area.”

 

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