California earthquakes

M1.8 earthquake 11km NNE of Simi Valley, CA

A magnitude 1.8 earthquake struck 11km NNE of Simi Valley, CA on Mon, Jan 28, 2002, 10:18 PM PST (06:18 UTC), 15 km (9 mi) below the surface.

A larger quake followed: M4.6 33km NW of Santa Barbara Is., 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
1.8 (ML, local (Richter)), micro
Magnitude from
Southern California Seismic Network
Local time
UTC
2002-01-29 06:18:53 UTC
Depth
14.7 km (9.1 mi), shallow
Epicenter
34.359° N, 118.676° 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 0.5 km horizontally, 0.9 km in depth
Magnitude uncertainty
±0.27
Depth from
From location
Station coverage gap
78°
Stations used
22

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 191 in the 60 days after this one and 53 in the 30 days before it.

After

The first 60 of 191.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event ci9753541. Read Sun, Oct 4, 2026, 10:22 AM UTC.