California earthquakes

M2.1 earthquake 11 km E of Hydesville, California

A magnitude 2.1 earthquake struck 11 km E of Hydesville, California on Sun, Jan 24, 1982, 11:52 PM PST (07:52 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M4.4 65 km WNW of Indianola, 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, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
1982-01-25 07:52:06 UTC
Depth
20.2 km (12.6 mi), shallow
Epicenter
40.550° N, 123.959° 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, 0.5 km in depth
Magnitude uncertainty
±0.13
Depth from
From location
Station coverage gap
67°
Stations used
20

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 103 in the 60 days after this one and 49 in the 30 days before it.

After

The first 60 of 103.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1071532. Read Fri, Oct 2, 2026, 8:05 PM UTC.