M3.1 earthquake 8km WSW of Devore, CA

A magnitude 3.1 earthquake struck 8km WSW of Devore, CA on Tue, Jun 17, 2003, 1:25 PM PDT (20:25 UTC), 2 km (1 mi) below the surface.

A larger quake followed: M4.2 34km NE of Lucerne Valley, 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
3.14	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · ±0.208 · 40 stations
3.1	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

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

Felt at Colton, Crestline, Rancho Cucamonga and San Bernardino.

From the USGS event page for ci9520538. 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: 156 in the 60 days after this one and 121 in the 30 days before it.

The first 60 of 156.

From the USGS Earthquake Hazards Program and its partner networks, event ci9520538 (also filed as usp000c03g). Read Mon, Oct 5, 2026, 9:28 AM UTC.