M2.8 earthquake 16km SE of Anza, CA

A magnitude 2.8 earthquake struck 16km SE of Anza, CA on Fri, Dec 13, 2002, 5:46 PM PST (01:46 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M3.5 14km ENE of Thousand Palms, CA. This one was a foreshock.

Map

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

Different scales measure different things and differ by a few tenths. The USGS marks one as preferred, and it is the one this page uses.

Mag.	Scale	Computed by	Notes
2.79	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · ±0.353 · 59 stations
2.8	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

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: 197 in the 60 days after this one and 105 in the 30 days before it.

The first 60 of 197.

From the USGS Earthquake Hazards Program and its partner networks, event ci9870369 (also filed as usp000bknj). Read Sun, Oct 4, 2026, 8:32 PM UTC.