California earthquakes

M3.5 earthquake 2km SSE of Cypress, CA

A magnitude 3.5 earthquake struck 2km SSE of Cypress, CA on Thu, Nov 17, 1949, 5:19 PM GMT-8 (01:19 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.9 2km SSE of Cudahy, CA. This one was a foreshock.

Cypress forecastMore in California

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
1949-11-18 01:19:53 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
33.803° N, 118.031° 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 2.0 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.25
Depth from
Operator assigned
Station coverage gap
151°
Stations used
8

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 25 in the 60 days after this one and 6 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3354791. Read Tue, Sep 22, 2026, 5:15 PM UTC.