California earthquakes

M4.0 earthquake 25km NNW of Tehachapi, CA

A magnitude 4.0 earthquake struck 25km NNW of Tehachapi, CA on Sat, Aug 9, 1952, 11:01 PM GMT-7 (06:01 UTC), 2 km (2 mi) below the surface.

A larger quake followed: M4.6 21km N of Tehachapi, 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
4.0 (ml), minor
Local time
UTC
1952-08-10 06:01:18 UTC
Depth
2.4 km (1.5 mi), shallow
Epicenter
35.344° N, 118.544° 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, 2.0 km in depth
Magnitude uncertainty
±0.14
Depth from
From location
Station coverage gap
139°
Stations used
12

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 56 in the 60 days after this one and 142 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3306442. Read Tue, Sep 22, 2026, 5:20 AM UTC.