California earthquakes

M1.5 earthquake 17 km NE of Mesa, California

A magnitude 1.5 earthquake struck 17 km NE of Mesa, California on Wed, Oct 8, 1986, 4:00 AM PDT (11:00 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M1.8 10 km NNE of Dixon Lane-Meadow Creek, California. This one was a foreshock.

Dixon Lane-Meadow Creek forecast More in California

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude: 1.5 (md), micro
Local time: Wed, Oct 8, 1986, 4:00 AM PDT
UTC: 1986-10-08 11:00:35 UTC
Depth: 5.5 km (3.4 mi), shallow
Epicenter: 37.544° N, 118.423° W
Region: California
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 5.4 km horizontally, 1.8 km in depth
Magnitude uncertainty: ±0.27
Depth from: From location
Station coverage gap: 278°, poorly surrounded by stations
Stations used: 7

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 200 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 200.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc85151. Read Tue, Sep 22, 2026, 8:18 AM UTC.