California earthquakes

M1.6 earthquake Central California

A magnitude 1.6 earthquake struck in Central California on Sun, Jun 29, 1975, 1:12 AM PDT (08:12 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
1.6 (md), micro
Local time
UTC
1975-06-29 08:12:13 UTC
Depth
9.7 km (6.0 mi), shallow
Epicenter
35.903° N, 120.763° 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 0.8 km horizontally, 2.5 km in depth
Magnitude uncertainty
±0.28
Depth from
From location
Station coverage gap
186°, poorly surrounded by stations
Stations used
9

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 106 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 nc1024581. Read Tue, Sep 29, 2026, 9:30 PM UTC.