California earthquakes

M4.7 earthquake 17km NW of Grapevine, CA

A magnitude 4.7 earthquake struck 17km NW of Grapevine, CA on Sun, Aug 17, 1952, 9:40 PM GMT-7 (04:40 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M5.5 The 1952 Bakersfield, California Earthquake. 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
4.7 (ml), light
Local time
UTC
1952-08-18 04:40:10 UTC
Depth
13.0 km (8.1 mi), shallow
Epicenter
35.035° N, 119.077° W
Strongest shaking
VI, strong shaking
Tsunami flag
No
Status
Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated
VI, strong shaking
Map
Automatic
USGS ShakeMap: estimated shaking intensity around the epicenter
Estimated shaking intensity. Map: USGS ShakeMap.

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 0.9 km horizontally, 1.6 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
177°
Stations used
10

Nearest places

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

Nearby

Within 100 km, magnitude 1.7 and up: 43 in the 60 days after this one and 155 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3306593 (also filed as ushis1853). Read Tue, Sep 22, 2026, 9:16 AM UTC.