M2.9 earthquake 19km N of Ocotillo, CA

A magnitude 2.9 earthquake struck 19km N of Ocotillo, CA on Sun, Aug 8, 2021, 11:09 PM PDT (06:09 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M4.0 12km N of Westmorland, 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
2.86	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · ±0.166 · 99 stations
2.7	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.058 · 39 stations

2 people reported to the USGS what they felt; the strongest reported shaking was II, weak shaking.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 157 in the 60 days after this one and 91 in the 30 days before it.

The first 60 of 157.

From the USGS Earthquake Hazards Program and its partner networks, event ci39768007 (also filed as us6000f3j6). Read Sun, Oct 4, 2026, 10:59 AM UTC.