News Summary

A preliminary magnitude 3.5 earthquake rattled Pomona Valley in Los Angeles County, sending tremors across the region. It struck in the San Gabriel Mountains, with no reports of damage or injuries. Residents from areas including Claremont felt the shaking, and the U.S. Geological Survey has launched an ongoing report for public input. As seismologists monitor the situation, residents are reminded of the importance of earthquake preparedness, even though this quake has been classified as light and has caused minimal impact.

Pomona

A preliminary magnitude 3.5 earthquake shook Pomona Valley in Los Angeles County on Saturday afternoon, September 6, 2025. The quake struck at approximately 5:11 p.m., sending tremors throughout the surrounding areas.

The epicenter of the earthquake was located over six miles north of La Verne, nestled within the San Gabriel Mountains. Reports indicate that the quake occurred at a geological depth of nearly four and a half miles. As of 5:20 p.m., no damage or injuries related to the earthquake had been reported.

Residents of nearby communities, including Claremont and Pomona, reported feeling the ground shake. The tremors were felt over a considerable distance, with shaking noted as far south as northern Orange County and extending into Riverside.

The U.S. Geological Survey (USGS) responded promptly to the seismic event, activating an ongoing “Did You Feel It?” report for the region, which allows residents to share their experiences of the earthquake.

This seismic activity follows a recent series of earthquakes in Southern California, which have included a number of quakes around the Ontario area within a condensed timeframe. The region is no stranger to earthquakes due to its location on numerous fault lines, which can often lead to minor tremors and larger seismic events.

Seismologists and local authorities continue to monitor the situation closely. Residents are urged to stay informed through official channels for any updates regarding aftershocks or safety measures. As of now, the earthquake remains under observation, and further information is expected as data becomes available.

Earthquakes of this magnitude can pose a risk, especially in urban areas, but typically, a magnitude of 3.5 is classified as a light earthquake, which often leads to minimal impact. Nevertheless, preparedness and awareness remain vital in regions prone to seismic activities.

For individuals and families living in Los Angeles County and surrounding areas, this earthquake serves as a reminder of the importance of emergency preparedness. Local emergency services recommend having a plan in place, including securing heavy furniture, establishing communication plans, and ensuring access to emergency supplies.

This incident, though concerning, has fortunately not caused any major disruptions. Local agencies are expected to provide detailed analyses of the incident in the coming days, and residents are encouraged to remain vigilant and continue following updates from reliable sources.

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Additional Resources

• CBS News: La Verne Earthquake
• Wikipedia: Earthquake
• ABC7: Ontario Area Earthquake
• Google Search: Earthquake Preparedness
• Daily Bulletin: Metrolink Earthquake Drill
• Encyclopedia Britannica: Seismic Wave
• LA Times: Ontario Earthquake
• Google News: Southern California Earthquake
• The Poly Post: CPP Buildings at Risk

Author: STAFF HERE LOS ANGELES WRITER

LOS ANGELES STAFF WRITER The LOS ANGELES STAFF WRITER represents the experienced team at HERELosAngeles.com, your go-to source for actionable local news and information in Los Angeles, Los Angeles County, and beyond, specializing in "news you can use" with coverage of product reviews for personal and business needs, local business directories, politics, real estate trends, neighborhood insights, and state news affecting the area—with deep expertise from years of dedicated reporting and strong community input, including local press releases and business updates, while delivering top reporting on high-value events like the Academy Awards, LA Auto Show, and Los Angeles Marathon, extending coverage to key organizations such as the Los Angeles Area Chamber of Commerce and the Los Angeles Tourism & Convention Board, plus leading businesses in entertainment and technology like Warner Bros. and SpaceX, and as part of the broader HERE network including HEREAnaheim.com , HERECostaMesa.com , HEREHuntingtonBeach.com , and HERESantaAna.com , providing comprehensive, credible insights into Southern California's dynamic landscape. HERE Anaheim HERE Beverly Hills HERE Coronado HERE Costa Mesa HERE Hollywood HERE Huntington Beach HERE Long Beach HERE Los Angeles HERE Mission Viejo HERE San Diego HERE Santa Ana