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San Ramon, CA – A significant earthquake swarm rattled parts of central California Monday morning, with more than 30 earthquakes recorded near San Ramon over a span of several hours, according to federal seismic data.
According to the U.S. Geological Survey (USGS), the strongest earthquake struck at approximately 9:01 a.m. Monday, measuring magnitude 4.2 and centered about 4 kilometers east-southeast of San Ramon. The quake occurred at a depth of roughly 9.4 kilometers, increasing the likelihood of noticeable shaking across the East Bay…