SFGATE: Swarm of temblors shake Mount Diablo, East Bay

Swarm of temblors shake Mount Diablo, East Bay
Published on February 20, 2018 at 04:16PM by By Sarah Ravani
A swarm of small earthquakes that never surpassed a magnitude of 3.0 were reported early Tuesday near Mount Diablo, according to the United States Geological Survey. The temblors reached a magnitude of 3.0, 2.9, 2.8 and 2.6, providing the latest installment in a series of swarms that have hit the region over the past week. At least 33 small earthquakes of similar magnitude have gently rocked the region this year, according to the USGS. “This looks to me to just be ordinary activity, especially for California,” said Don Blakeman, a geophysicist at the National Earthquake Center. “Since you live on the margin of two tectonic plates … these swarms come sometimes.
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