M1.8 earthquake 3km SSE of Calimesa, CA

A magnitude 1.8 earthquake struck 3km SSE of Calimesa, CA on Sun, May 9, 1982, 2:36 PM PDT (21:36 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M2.6 2km NNE of Anza, 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: 199 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 199.

From the USGS Earthquake Hazards Program and its partner networks, event ci530439. Read Tue, Sep 22, 2026, 8:28 PM UTC.