California earthquakes

M1.5 earthquake 24km WNW of Ludlow, California

A magnitude 1.5 earthquake struck 24km WNW of Ludlow, California on Mon, May 20, 2002, 7:12 PM PDT (02:12 UTC), 4 km (3 mi) below the surface.

A larger quake followed: M3.3 9km NW of Morongo Valley, 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
1.5 (ML, local (Richter)), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
2002-05-21 02:12:17 UTC
Depth
4.2 km (2.6 mi), shallow
Epicenter
34.831° N, 116.388° 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, 0.5 km in depth
Magnitude uncertainty
±0.08
Depth from
From location
Station coverage gap
132°
Stations used
7

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 115 in the 60 days after this one and 66 in the 30 days before it.

After

The first 60 of 115.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci13291440. Read Mon, Oct 5, 2026, 12:53 PM UTC.