California earthquakes

M4.2 earthquake 19km NNW of Tehachapi, CA

A magnitude 4.2 earthquake struck 19km NNW of Tehachapi, CA on Mon, Jul 21, 1952, 8:42 AM GMT-7 (15:42 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M4.3 1km NNE of Grapevine, 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
4.2 (ml), light
Local time
UTC
1952-07-21 15:42:35 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
35.299° N, 118.507° 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 2.5 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
158°
Stations used
4

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 199 in the 60 days after this one and 0 in the 30 days before it.

After

The first 60 of 199.

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3319114. Read Tue, Sep 22, 2026, 8:03 AM UTC.