California earthquakes

M2.5 earthquake 22 km WSW of Three Rocks, California

A magnitude 2.5 earthquake struck 22 km WSW of Three Rocks, California on Sun, Nov 12, 1978, 8:26 AM PST (16:26 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M3.8 10 km ESE of Coalinga, California. This one was a foreshock.

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The earthquake

Magnitude: 2.5 (md), micro
Local time: Sun, Nov 12, 1978, 8:26 AM PST
UTC: 1978-11-12 16:26:58 UTC
Depth: 15.7 km (9.7 mi), shallow
Epicenter: 36.447° N, 120.634° W
Region: California
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 0.4 km horizontally, 0.7 km in depth
Magnitude uncertainty: ±0.03
Depth from: From location
Station coverage gap: 150°
Stations used: 19

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 109 in the 60 days after this one and 58 in the 30 days before it.

After

The first 60 of 109.

Before

Earthquakes today California earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1043346. Read Thu, Oct 1, 2026, 12:01 AM UTC.