M2.8 earthquake 7km SSW of Devore, CA

A magnitude 2.8 earthquake struck 7km SSW of Devore, CA on Sat, Sep 7, 2002, 6:24 AM PDT (13:24 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M3.7 10km NE of Aguanga, 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
2.82	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · ±0.22 · 105 stations
2.8	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

The USGS’s account of the effects of this earthquake.

Felt (III) at Upland and (II) at Fontana, Lytle Creek, Rancho Cucamonga and Rialto.

From the USGS event page for ci9820929. U.S. Geological Survey text and figures are in the public domain.

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: 160 in the 60 days after this one and 124 in the 30 days before it.

The first 60 of 160.

From the USGS Earthquake Hazards Program and its partner networks, event ci9820929 (also filed as usp000bbjc). Read Sun, Oct 4, 2026, 11:29 PM UTC.