California earthquakes

M1.5 earthquake 29km WNW of Ludlow, CA

A magnitude 1.5 earthquake struck 29km WNW of Ludlow, CA on Thu, May 7, 1981, 6:10 PM PDT (01:10 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M2.4 33km E of Johannesburg, CA. This one was a foreshock.

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Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
1.5 (Mc), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
1981-05-08 01:10:14 UTC
Depth
2.8 km (1.7 mi), shallow
Epicenter
34.781° N, 116.465° 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 0.9 km horizontally, 1.6 km in depth
Depth from
From location
Station coverage gap
192°, poorly surrounded by stations
Stations used
13

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 43 in the 60 days after this one and 33 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci515622. Read Sat, Oct 3, 2026, 10:39 AM UTC.