California earthquakes

M2.5 earthquake 1km NW of Lake Davis, CA

A magnitude 2.5 earthquake struck 1km NW of Lake Davis, CA on Mon, May 24, 2021, 9:41 AM PDT (16:41 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M4.2 10km SE of Dollar Point, 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: 2.5 (Md, duration), micro
Magnitude from: Northern California Seismic System
Local time: Mon, May 24, 2021, 9:41 AM PDT
UTC: 2021-05-24 16:41:23 UTC
Depth: 4.2 km (2.6 mi), shallow
Epicenter: 39.874° N, 120.477° W
Region: California
Felt reports: 5
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
2.48	Md, duration	Northern California Seismic System	Preferred · Final · ±0.098 · 32 stations
2.3	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.052 · 48 stations
2.4	ML, local (Richter)	Nevada Seismological Laboratory	Reviewed · ±0.31 · 9 stations

Did you feel it?

5 people reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 0.3 km horizontally, 0.8 km in depth
Magnitude uncertainty: ±0.10
Depth from: From location
Station coverage gap: 118°
Stations used: 11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 53 in the 60 days after this one and 60 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73566715 (also filed as nn00808048, us7000e5un). Read Sun, Oct 4, 2026, 11:30 PM UTC.