M2.6 earthquake 8km SSE of Brawley, CA

A magnitude 2.6 earthquake struck 8km SSE of Brawley, CA on Fri, Oct 21, 1977, 12:57 AM PDT (07:57 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.1 8km W of Holtville, CA. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 187 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 187.

From the USGS Earthquake Hazards Program and its partner networks, event ci3335430. Read Tue, Sep 22, 2026, 8:35 PM UTC.