California earthquakes

M2.3 earthquake 18km SSW of Oasis, CA

A magnitude 2.3 earthquake struck 18km SSW of Oasis, CA on Sat, Dec 11, 2021, 7:07 AM PST (15:07 UTC), 11 km (7 mi) below the surface.

A larger quake followed: M4.0 5km WSW of Palomar Observatory, 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
2.3 (ML, local (Richter)), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
2021-12-11 15:07:03 UTC
Depth
10.9 km (6.8 mi), shallow
Epicenter
33.326° N, 116.187° W
Felt reports
1
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

1 person reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.1 km horizontally, 0.4 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
21°
Stations used
85

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 196 in the 60 days after this one and 72 in the 30 days before it.

After

The first 60 of 196.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci39885423. Read Sun, Oct 4, 2026, 8:47 AM UTC.