California earthquakes

M2.3 earthquake 26km S of Hayfork, CA

A magnitude 2.3 earthquake struck 26km S of Hayfork, CA on Fri, Apr 9, 2021, 4:12 PM PDT (23:12 UTC), 38 km (24 mi) below the surface.

A larger quake followed: M4.0 20km ENE of Redway, CA. This one was a foreshock.

Hayfork 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
2.3 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-04-09 23:12:21 UTC
Depth
37.9 km (23.5 mi), shallow
Epicenter
40.321° N, 123.217° 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, 0.8 km in depth
Magnitude uncertainty
±0.15
Depth from
From location
Station coverage gap
45°
Stations used
38

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 61 in the 60 days after this one and 30 in the 30 days before it.

After

The first 60 of 61.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73547385. Read Sun, Oct 4, 2026, 6:12 AM UTC.