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Earthquakes Called “San Ramon Swarm”

More than 100 earthquakes have shaken up the San Francisco Bay area in the last four days.

Scientists at the U-S Geological Survey are calling it the “San Ramon swarm.”

Seven earthquakes of magnitude three or higher have hit the area since a 3.9 struck on Sunday morning.

Seismologists say they don´t know if the sequence will trigger a larger quake. They say it´s likely the earthquake swarm will persist for a few weeks and earthquakes as large as magnitude four could occur.