3‑5 magnitude quakes shake Big Bear, USGS says no damage

When USGS logged a 3.5‑magnitude tremor at 11:15 p.m. PT on Saturday, Oct. 18, 2025, the small resort town of Big Bear in San Berkeley County, California woke up to a sudden jolt. The quake struck roughly four miles north of Big Bear Lake, about four miles beneath the surface, and set off a cascade of four more shakings over the next eight hours. CBS News ran the story the following morning, noting that despite the perceptible shaking—reported as far west as Ontario, California—no injuries or property damage were recorded. The sequence, now dubbed the “Big Bear earthquake swarm,” underscores how even moderate‑size quakes can rattle a community without leaving a trail of devastation.