California earthquakes

M1.9 earthquake 2km ENE of Carson, CA

A magnitude 1.9 earthquake struck 2km ENE of Carson, CA on Sun, Apr 30, 1933, 11:08 AM GMT-8 (19:08 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M2.9 1km SSE of Rossmoor, 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
1.9 (ml), micro
Local time
UTC
1933-04-30 19:08:57 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
33.836° N, 118.267° 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 1.4 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.09
Depth from
Operator assigned
Station coverage gap
297°, poorly surrounded by stations
Stations used
3

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 ci3360404. Read Tue, Sep 22, 2026, 9:25 PM UTC.