California earthquakes

M3.1 earthquake 14 km SSW of Three Rocks, California

A magnitude 3.1 earthquake struck 14 km SSW of Three Rocks, California on Tue, Jun 10, 1986, 3:29 AM PDT (10:29 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.5 18 km SSE of Tres Pinos, California. This one was a foreshock.

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Map

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

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The earthquake

Magnitude: 3.1 (md), minor
Local time: Tue, Jun 10, 1986, 3:29 AM PDT
UTC: 1986-06-10 10:29:59 UTC
Depth: 5.4 km (3.3 mi), shallow
Epicenter: 36.381° N, 120.459° 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 0.2 km horizontally, 0.3 km in depth
Magnitude uncertainty: ±0.13
Depth from: From location
Station coverage gap: 44°
Stations used: 74

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 198 in the 60 days after this one and 156 in the 30 days before it.

After

The first 60 of 198.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc74374 (also filed as ci126338, usp0002uy2). Read Tue, Sep 29, 2026, 8:57 PM UTC.