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

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.

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

Glacial earthquakes are a special type of earthquake generated in cold, icy regions. First discovered in the Northern Hemisphere more than 20 years ago, these quakes occur when huge chunks of ice fall from glaciers into the sea.

A series of earthquakes, including a 4.0 magnitude earthquake, rattled the area near San Ramon Friday, according to the United States Geological Survey.

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,