M1.7 earthquake 4km NNE of Brawley, CA

A magnitude 1.7 earthquake struck 4km NNE of Brawley, CA on Sat, Jan 21, 1978, 1:28 AM PST (09:28 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.7 4km NNW of Guadalupe Victoria, B.C., MX. 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: 179 in the 60 days after this one and 100 in the 30 days before it.

The first 60 of 179.

From the USGS Earthquake Hazards Program and its partner networks, event ci9997806. Read Mon, Oct 5, 2026, 10:30 AM UTC.