California earthquakes

M2.1 earthquake 6km E of Calimesa, CA

A magnitude 2.1 earthquake struck 6km E of Calimesa, CA on Thu, Dec 13, 2001, 3:41 AM PST (11:41 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M4.2 15km NNW of Borrego Springs, CA. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
2.1 (ML, local (Richter)), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
2001-12-13 11:41:18 UTC
Depth
15.9 km (9.9 mi), shallow
Epicenter
33.991° N, 116.991° 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, 0.7 km in depth
Magnitude uncertainty
±0.24
Depth from
From location
Station coverage gap
33°
Stations used
57

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 183 in the 60 days after this one and 146 in the 30 days before it.

After

The first 60 of 183.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci9734749. Read Mon, Oct 5, 2026, 2:46 PM UTC.