California earthquakes

M2.1 earthquake 6km ESE of Round Valley, CA

A magnitude 2.1 earthquake struck 6km ESE of Round Valley, CA on Sun, Jul 4, 2021, 8:49 PM PDT (03:49 UTC), 0 km (0 mi) below the surface.

A larger quake followed: M3.9 28 km SSW of Mina, Nevada. 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
2021-07-05 03:49:11 UTC
Depth
-0.3 km (-0.2 mi), shallow
Epicenter
37.400° N, 118.527° 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 0.4 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.17
Depth from
Operator assigned
Station coverage gap
58°
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: 142 in the 60 days after this one and 87 in the 30 days before it.

After

The first 60 of 142.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73583246. Read Sun, Oct 4, 2026, 1:59 AM UTC.