M2.5 earthquake 7km SSW of Devore, CA

A magnitude 2.5 earthquake struck 7km SSW of Devore, CA on Sat, Jul 27, 2002, 10:47 PM PDT (05:47 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M4.8 4km NE of Yorba Linda, 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
2.55	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · ±0.252 · 79 stations
2.5	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

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

Felt at Alta Loma, Rancho Cucamonga and Rialto.

From the USGS event page for ci13693312. 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: 159 in the 60 days after this one and 82 in the 30 days before it.

The first 60 of 159.

From the USGS Earthquake Hazards Program and its partner networks, event ci13693312 (also filed as usp000b8x3). Read Mon, Oct 5, 2026, 3:01 AM UTC.