California earthquakes

M1.9 earthquake 5km NNW of Brawley, CA

A magnitude 1.9 earthquake struck 5km NNW of Brawley, CA on Sun, Dec 10, 1978, 9:49 PM PST (05:49 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M3.6 26km SE of Campo, 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
1.9 (Mh), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
1978-12-11 05:49:43 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
33.015° N, 115.557° 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 1.1 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.21
Depth from
Operator assigned
Station coverage gap
121°
Stations used
21

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 159 in the 60 days after this one and 105 in the 30 days before it.

After

The first 60 of 159.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3314162. Read Sat, Oct 3, 2026, 4:46 PM UTC.