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San Ramon, California — A small earthquake swarm struck east-southeast of San Ramon on Friday, prompting light shaking reports but no immediate damage.
According to the U.S. Geological Survey, three earthquakes occurred within minutes of each other about 4 kilometers (2.5 miles) east-southeast of San Ramon in Contra Costa County. The largest registered a magnitude 3.0, followed by magnitude 2.8 and 2.6 events…