California earthquakes

M3.9 earthquake 15km W of Tehachapi, CA

A magnitude 3.9 earthquake struck 15km W of Tehachapi, CA on Tue, Jul 29, 1952, 2:37 AM GMT-7 (09:37 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.8 15km WNW 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
3.9 (ml), minor
Local time
UTC
1952-07-29 09:37:37 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
35.128° N, 118.611° 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 1.5 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.14
Depth from
Operator assigned
Station coverage gap
87°
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: 88 in the 60 days after this one and 110 in the 30 days before it.

After

The first 60 of 88.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3317832. Read Tue, Sep 22, 2026, 2:53 PM UTC.