California earthquakes

M2.1 earthquake 15km NE of Lamont, CA

A magnitude 2.1 earthquake struck 15km NE of Lamont, CA on Wed, Apr 10, 1985, 3:00 PM PST (23:00 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.5 10km NW of Grapevine, CA. 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
2.1 (mc), micro
Local time
UTC
1985-04-10 23:00:54 UTC
Depth
5.0 km (3.1 mi), shallow
Epicenter
35.356° N, 118.800° 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.

Depth from
Operator assigned
Station coverage gap
167°
Stations used
0

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 68 in the 60 days after this one and 30 in the 30 days before it.

After

The first 60 of 68.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci64158. Read Tue, Sep 22, 2026, 8:51 PM UTC.