A swarm of more than 20 earthquakes reaching up to 3.8 magnitude rattled San Ramon near San Francisco in Northern California, the U.S. Geological Survey reports. The other quakes in the Sunday, Nov. 9, swarm ranged from 1.0 to 3.7 magnitude as of 11 a.m., according to the USGS.

A series of eight small earthquakes rattled the East Bay on Sunday morning. The U.S. Geological Society reported the first four quakes struck near San Ramon in

Four earthquakes centered in the San Ramon area of Contra Costa County that struck beginning at 9:38 a.m. this morning. according to the United States Geological Survey. The small swarm beginning with two back-to-back 3.7 quakes followed by a 3.0 and a 2.9, all preliminary magnitudes.

Seismic activity continued to rattle the East Bay on Sunday, while an earlier quake was revised upward to a magnitude of 3.8.

Two earthquakes — a magnitude 5.4 followed by a magnitude 4.8 — struck off the Oregon coast early Wednesday morning, according to the U.S. Geological Survey.

Recent advancements in seismology have shed light on the enigmatic triggers behind ‘impossible’ earthquakes, seismic events that occur in regions not typically associated with tectonic activity. These findings build upon earlier research into the Earth’s mysterious hum,