M2.9 earthquake 9km SE of Ocotillo, CA

A magnitude 2.9 earthquake struck 9km SE of Ocotillo, CA on Fri, Oct 10, 2008, 8:03 PM PDT (03:03 UTC), 3 km (2 mi) below the surface.

A larger quake followed: M5.0 13km WSW of Delta, B.C., MX. 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
2.94	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · ±0.128 · 86 stations
2.9	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

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

Felt in the Ocotillo area.

From the USGS event page for ci10353421. 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: 201 in the 60 days after this one and 97 in the 30 days before it.

The first 60 of 201.

From the USGS Earthquake Hazards Program and its partner networks, event ci10353421 (also filed as usp000gjxf). Read Mon, Oct 5, 2026, 12:04 PM UTC.