SAN RAMON, Calif. — A 4.2 earthquake, following a 3.8 quake rattled the San Francisco Bay area on Monday morning amid a string of over 30 temblors in the area, U.S. Geological Survey said.

The 4.2 quake struck at 7:01 a.m. and followed a string of quakes that began with a 3.8 at 6:27 a.m. Dozens of earthquakes have followed.

USGS said the 4.2 tremor was about 9.4 km in depth.

There have been no reports of injuries.

Video from a 7-Eleven shows products falling off shelves during one of the earthquakes.

Our sister station KGO-TV spoke with the USGS Monday morning, and they say this is a continuation of the swarm of quakes the area has been experiencing.

On Friday, the area saw its first earthquake in several weeks, but there have been dozens of quakes since November.

MAP: Significant San Francisco Bay Area fault lines and strong earthquakes
Zoom in on the map below and see where strong earthquakes have struck in the Bay Area.

Stay with ABC7 News for the latest details on this developing story.

Copyright © 2026 KGO-TV. All Rights Reserved.