California earthquakes

M1.7 earthquake 2km NE of Carson, CA

A magnitude 1.7 earthquake struck 2km NE of Carson, CA on Wed, Jul 18, 1934, 1:29 AM GMT-8 (09:29 UTC), 6 km (4 mi) below the surface.

A larger quake followed: M3.7 6km ENE of Rancho Cucamonga, CA. This one was a foreshock.

Carson 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
1.7 (ml), micro
Local time
UTC
1934-07-18 09:29:04 UTC
Depth
6.0 km (3.7 mi), shallow
Epicenter
33.844° N, 118.264° 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 2.4 km horizontally, 31.6 km in depth
Magnitude uncertainty
±0.18
Depth from
Operator assigned
Station coverage gap
296°, 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: 44 in the 60 days after this one and 16 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci3362297. Read Thu, Oct 1, 2026, 1:54 AM UTC.