California earthquakes

M3.5 earthquake 14km SSE of Avalon, CA

A magnitude 3.5 earthquake struck 14km SSE of Avalon, CA on Sun, May 7, 1933, 6:33 AM GMT-8 (14:33 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.9 3km ENE of Seal Beach, 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
3.5 (ml), minor
Local time
UTC
1933-05-07 14:33:19 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
33.234° N, 118.250° 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 2.9 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.13
Depth from
Operator assigned
Station coverage gap
321°, 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: 178 in the 60 days after this one and 20 in the 30 days before it.

After

The first 60 of 178.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3360478. Read Tue, Sep 22, 2026, 10:28 AM UTC.