California earthquakes

M1.8 earthquake 6km SW of Round Valley, CA

A magnitude 1.8 earthquake struck 6km SW of Round Valley, CA on Tue, Feb 9, 2021, 2:38 PM PST (22:38 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M3.7 6km ESE of Wilkerson, CA. 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, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2021-02-09 22:38:55 UTC
Depth
13.0 km (8.1 mi), shallow
Epicenter
37.372° N, 118.638° 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
±0.24
Depth from
From location
Station coverage gap
130°
Stations used
31

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 144 in the 60 days after this one and 175 in the 30 days before it.

After

The first 60 of 144.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73520911. Read Sat, Oct 3, 2026, 8:28 AM UTC.