(KRON) — A 3.9-magnitude earthquake shook the East Bay Monday morning, according to the U.S. Geological Survey. The epicenter was 2.6 miles southeast of San Ramon. The tremblor occurred on the Calaveras Fault at 6:27 a.m., USGS said. Two minutes later, there was a 3.3-magnitude aftershock. Two 2.5-magnitude quakes rumbled the region at 6:48 a.m. […]
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