Anza, CA – Residents across parts of Riverside County and Southern California felt light shaking Thursday morning after a moderate earthquake struck near the community of Anza.
According to the U.S. Geological Survey (USGS), a magnitude 3.4 earthquake was recorded at 6:52 a.m. Pacific Time Thursday, December 19, with the epicenter located approximately 19 kilometers east-southeast of Anza. The quake occurred at a depth of about 13.2 kilometers, classifying it as a shallow event that can often be felt near the surface.
The earthquake was detected by the California Integrated Seismic Network (CISN) and was automatically reviewed shortly after occurring. Initial reports indicate the shaking was felt in nearby communities including parts of Riverside County, with some residents in the Inland Empire and northern San Diego County also reporting mild movement.
USGS community intensity data showed reports consistent with weak to light shaking, and as of Thursday morning, no injuries or structural damage have been reported. Emergency officials have not issued any alerts or warnings in connection with the quake.
Southern California is one of the most seismically active regions in the United States, and small-to-moderate earthquakes such as this are relatively common. Experts note that quakes in the magnitude 3 range may be felt locally but rarely cause damage.
Residents who experienced the shaking are encouraged to submit reports through the USGS “Did You Feel It?” system, which helps scientists better understand how earthquakes impact communities.
Officials continue to monitor for potential aftershocks, though none were immediately reported.
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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