California earthquakes

M2.0 earthquake 10 km NW of Cohasset, California

A magnitude 2.0 earthquake struck 10 km NW of Cohasset, California on Tue, Sep 24, 1985, 3:56 PM PDT (22:56 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M2.3 12 km NE of Vina, California. This one was a foreshock.

Cohasset forecastMore in California

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
1985-09-24 22:56:17 UTC
Depth
5.0 km (3.1 mi), shallow
Epicenter
39.992° N, 121.810° 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 1.3 km horizontally, 2.1 km in depth
Magnitude uncertainty
±0.17
Depth from
From location
Station coverage gap
149°
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: 48 in the 60 days after this one and 28 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc56757. Read Tue, Sep 22, 2026, 10:26 PM UTC.