California earthquakes

M2.0 earthquake 17 km WSW of Three Rocks, California

A magnitude 2.0 earthquake struck 17 km WSW of Three Rocks, California on Sat, Dec 20, 1986, 11:47 AM PST (19:47 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.4 27 km NE of Soledad, 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
2.0 (md), micro
Local time
UTC
1986-12-20 19:47:59 UTC
Depth
6.3 km (3.9 mi), shallow
Epicenter
36.465° N, 120.581° W
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 0.4 km horizontally, 1.2 km in depth
Magnitude uncertainty
±0.10
Depth from
From location
Station coverage gap
150°
Stations used
32

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 180 in the 60 days after this one and 15 in the 30 days before it.

After

The first 60 of 180.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc90673. Read Tue, Sep 22, 2026, 8:23 PM UTC.