California earthquakes

M1.9 earthquake 13 km NW of Moskowite Corner, California

A magnitude 1.9 earthquake struck 13 km NW of Moskowite Corner, California on Wed, Sep 4, 1985, 2:06 AM PDT (09:06 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M2.0 5 km NE of Williams, 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: 1.9 (md), micro
Local time: Wed, Sep 4, 1985, 2:06 AM PDT
UTC: 1985-09-04 09:06:46 UTC
Depth: 0.0 km (0.0 mi), shallow
Epicenter: 38.536° N, 122.289° 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 0.8 km horizontally, 14.9 km in depth
Magnitude uncertainty: ±0.16
Depth from: From location
Station coverage gap: 79°
Stations used: 23

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 165 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 165.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc54520. Read Tue, Sep 22, 2026, 9:40 PM UTC.