M2.8 earthquake 2km E of Wrightwood, CA

A magnitude 2.8 earthquake struck 2km E of Wrightwood, CA on Thu, Jun 24, 2021, 4:11 PM PDT (23:11 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M3.4 4km NNW of Fontana, 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
2.78	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · ±0.18 · 25 stations
2.6	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.037 · 94 stations

17 people reported to the USGS what they felt; the strongest reported shaking was IV, light 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: 70 in the 60 days after this one and 66 in the 30 days before it.

The first 60 of 70.

From the USGS Earthquake Hazards Program and its partner networks, event ci39718135 (also filed as us6000epis). Read Sun, Oct 4, 2026, 4:05 PM UTC.