California earthquakes

M4.0 earthquake 13km NNE of Grapevine, CA

A magnitude 4.0 earthquake struck 13km NNE of Grapevine, CA on Thu, Sep 25, 1952, 9:21 AM GMT-7 (16:21 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M4.0 16km W 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), light
Local time
UTC
1952-09-25 16:21:35 UTC
Depth
8.4 km (5.2 mi), shallow
Epicenter
35.056° N, 118.889° 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 1.9 km horizontally, 4.3 km in depth
Magnitude uncertainty
±0.11
Depth from
From location
Station coverage gap
134°
Stations used
11

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 22 in the 60 days after this one and 25 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3306792. Read Tue, Sep 22, 2026, 9:41 AM UTC.