California earthquakes

M3.7 earthquake 28 km W of Three Rocks, California

A magnitude 3.7 earthquake struck 28 km W of Three Rocks, California on Tue, Jun 10, 1975, 6:52 AM PDT (13:52 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.9 7 km SW of Three Rocks, California. 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
3.7 (md), minor
Local time
UTC
1975-06-10 13:52:13 UTC
Depth
9.9 km (6.1 mi), shallow
Epicenter
36.509° N, 120.709° 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 0.5 km horizontally, 0.9 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
137°
Stations used
17

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 191 in the 60 days after this one and 138 in the 30 days before it.

After

The first 60 of 191.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc1024280. Read Wed, Sep 30, 2026, 6:09 PM UTC.