California earthquakes

M2.3 earthquake 30km SSW of Qualeys Camp, NV

A magnitude 2.3 earthquake struck 30km SSW of Qualeys Camp, NV on Wed, Apr 21, 2021, 9:42 AM PDT (16:42 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M4.4 30 km SE 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: 2.3 (Md, duration), micro
Magnitude from: Northern California Seismic System
Local time: Wed, Apr 21, 2021, 9:42 AM PDT
UTC: 2021-04-21 16:42:34 UTC
Depth: 2.7 km (1.7 mi), shallow
Epicenter: 38.067° N, 118.671° W
Region: California
Tsunami flag: No
Status: Reviewed by a seismologist

Magnitude estimates

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
2.3	Md, duration	Northern California Seismic System	Preferred · Final · ±0.111 · 39 stations
2.2	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.047 · 60 stations
2.7	ML, local (Richter)	Nevada Seismological Laboratory	Reviewed · ±0.31 · 14 stations

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 0.2 km horizontally, 3.1 km in depth
Magnitude uncertainty: ±0.11
Depth from: From location
Station coverage gap: 70°
Stations used: 35

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: at least 200 in the 60 days after this one and 198 in the 30 days before it.

After

The first 60 of at least 200.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73552705 (also filed as nn00805490, us6000e3gy). Read Sat, Oct 3, 2026, 2:07 PM UTC.