California earthquakes

M2.1 earthquake 10 km S of Huron, California

A magnitude 2.1 earthquake struck 10 km S of Huron, California on Mon, Aug 5, 1985, 11:55 PM PDT (06:55 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M2.4 10 km S of Huron, 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
2.1 (md), micro
Local time
UTC
1985-08-06 06:55:10 UTC
Depth
7.7 km (4.8 mi), shallow
Epicenter
36.107° N, 120.090° 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 1.6 km horizontally, 0.7 km in depth
Magnitude uncertainty
±0.09
Depth from
From location
Station coverage gap
199°, poorly surrounded by stations
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 199 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 199.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc52557. Read Tue, Sep 22, 2026, 8:35 PM UTC.