M2.3 earthquake 2km ESE of Simi Valley, CA

A magnitude 2.3 earthquake struck 2km ESE of Simi Valley, CA on Sat, Dec 1, 2001, 10:34 AM PST (18:34 UTC), 22 km (14 mi) below the surface.

A larger quake followed: M4.2 13km NE of Simi Valley, CA. This one was a foreshock.

Map

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

No one has reported feeling this quake to the USGS.

Reviewed by a seismologist.

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

Within 100 km, magnitude 1.5 and up: 149 in the 60 days after this one and 46 in the 30 days before it.

The first 60 of 149.

From the USGS Earthquake Hazards Program and its partner networks, event ci9728285. Read Mon, Oct 5, 2026, 5:33 AM UTC.