M1.5 earthquake 42 km WNW of Three Rocks, California

A magnitude 1.5 earthquake struck 42 km WNW of Three Rocks, California on Fri, Jul 6, 1979, 8:31 AM PDT (15:31 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M5.8 The 1979 Coyote Lake, California Earthquake. 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: 196 in the 60 days after this one and 56 in the 30 days before it.

The first 60 of 196.

From the USGS Earthquake Hazards Program and its partner networks, event nc1046460. Read Fri, Oct 2, 2026, 6:55 PM UTC.