M1.6 earthquake 15 km NE of Mesa, California

A magnitude 1.6 earthquake struck 15 km NE of Mesa, California on Wed, Aug 20, 1986, 5:43 AM PDT (12:43 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.0 15 km N of Dixon Lane-Meadow Creek, 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: 200 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 200.

From the USGS Earthquake Hazards Program and its partner networks, event nc79701. Read Wed, Sep 23, 2026, 2:48 AM UTC.