3.3-magnitude quake jolts Redlands area with no injuries reported

A 3.3-magnitude earthquake struck near Loma Linda Wednesday morning, rattling the Redlands area with no immediate reports of injuries or structural damage, the U.S. Geological Survey said.

The temblor is a reminder of the seismic exposure shared across Southern California, a region that includes Orange County, where millions of residents live near active fault systems and are advised to keep emergency plans current.

The quake struck at 9:45 a.m. with its epicenter approximately 4 miles northwest of Loma Linda, on the border of San Bernardino and Riverside counties, according to the U.S. Geological Survey.

No injuries were reported in the immediate aftermath, and no structural damage was confirmed in the surrounding area, the USGS said.

The Redlands area sits within a seismically active corridor of Southern California, where small-to-moderate earthquakes occur routinely along an intricate network of active fault lines. Shaking from events centered in San Bernardino or Riverside counties can propagate across a wide area, including communities in Orange County.

While Wednesday's quake was not expected to cause lasting disruption, regional emergency planners consistently advise Southern California residents — regardless of county — to maintain readiness kits and review household evacuation plans ahead of more significant seismic events.

The USGS tracks seismic activity across California in real time through a network of ground sensors, providing magnitude estimates and epicenter locations within seconds of any notable tremor.

Residents throughout Southern California, including those in Orange County, can monitor regional seismic activity and access real-time earthquake data through the U.S. Geological Survey.