A swarm of earthquakes rattled the Bay Area on the evening of Friday, December 19. The earthquakes occurred over a 30-minute span, according to the U.S. Geological Survey. There have been no reports of damage or casualties, and no tsunami warnings have been issued as of reporting.

SAN BERNARDINO COUNTY, CA - According to the U.S. Geological Survey, a preliminary 2.5 magnitude quake rattled near Fontana Thursday night.

Japan’s Meteorological Agency said a powerful earthquake hit off the Japanese northern coast Monday, triggering a tsunami alert.

Aftershocks have been recorded for both earthquakes. On Dec. 8, Japanese authorities warned an even more powerful earthquake could strike within the next week and called on residents from the northernmost island of Hokkaido down to Chiba prefecture, east of Tokyo, to be on high alert.

Several earthquakes, the largest measured at magnitude-3.3, were reported Thursday morning in Ventura County. The earthquakes were centered near Fillmore, about 25 miles northeast of Ventura. Shaking was reported in Fillmore, Moorpark, Ventura and Santa Paula.

This comes as landslides, earthquakes, and relentless rain have impacted the area this week. Concrete rests at the confluence of the Baker and Skagit rivers -- just north of town is the Lower Baker Dam. RELATED: Western Washington braces for another storm as heavy rain threatens more flooding havoc

Underwater earthquakes can trigger massive phytoplankton blooms, linking deep-sea seismic activity to ocean life and carbon cycling.

In California's East Bay, a recent swarm of small earthquakes has pushed long-standing seismic risks back into public view. Since early November 2025, at least 90 minor quakes have been recorded around San Ramon,