California, Oregon, and Baja Mexico See Increased Earthquake Activity to Start September

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Seismograph printing seismic activity records of a severe earthquake.
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San Francisco, CA – A series of small to moderate earthquakes struck along the West Coast fault zones over the past 24 hours, rattling communities from Oregon to Baja California, Mexico. While no major damage was reported, the cluster of seismic activity has drawn attention to the fault lines stretching along the Pacific coast.

According to the U.S. Geological Survey (USGS), at least eight earthquakes were recorded since Monday afternoon, with magnitudes ranging from 2.5 to 4.8. The largest, a magnitude 4.8 quake, struck late Monday about 9 kilometers south-southeast of La Playa, Mexico, near Cabo San Lucas, at a depth of 10 kilometers. Hours later, a 4.2 magnitude earthquake hit early Tuesday roughly 68 kilometers east-northeast of San Vicente, Mexico, shaking areas not far from the U.S.-Mexico border.

In California, several quakes were recorded Monday evening. A 3.7 magnitude tremor was reported near Tres Pinos, south of San Jose, while a 2.6 struck near Mentone in San Bernardino County. Additional smaller quakes occurred near Thousand Palms and Cobb, California. Northern California also registered a 3.4 quake west of Petrolia, a region known for frequent seismic activity.

Farther north, offshore Oregon experienced a 2.7 magnitude quake about 190 kilometers west of Bandon early Tuesday, according to USGS data.

Residents in parts of Southern California and northern Mexico reported light shaking, with “Did You Feel It?” responses confirming tremors felt in San Diego, Los Angeles, and Baja cities. No injuries or structural damage have been confirmed.

Seismologists note that while clusters like this are not unusual along the Pacific fault zones, the geographic spread—from Oregon down to Baja—serves as a reminder of the region’s seismic volatility. Authorities continue to urge preparedness for stronger earthquakes in the future.


This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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