California earthquakes

M1.8 earthquake 12 km W of Huron, California

A magnitude 1.8 earthquake struck 12 km W of Huron, California on Mon, Sep 10, 1984, 3:17 AM PDT (10:17 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M4.0 21 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
1.8 (md), micro
Local time
UTC
1984-09-10 10:17:30 UTC
Depth
13.0 km (8.1 mi), shallow
Epicenter
36.197° N, 120.238° 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 0.3 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.12
Depth from
From location
Station coverage gap
75°
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: 150 in the 60 days after this one and 93 in the 30 days before it.

After

The first 60 of 150.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc27666 (also filed as ci50288). Read Thu, Oct 1, 2026, 12:05 AM UTC.