M1.6 earthquake 4 km ENE of Mesa, California

A magnitude 1.6 earthquake struck 4 km ENE of Mesa, California on Wed, Aug 12, 1987, 8:43 PM PDT (03:43 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.3 24 km E of Fish Camp, California. 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: at least 200 in the 60 days after this one and 116 in the 30 days before it.

The first 60 of at least 200.

From the USGS Earthquake Hazards Program and its partner networks, event nc104474. Read Wed, Sep 30, 2026, 4:20 AM UTC.