M2.8 earthquake 10km SSW of Idyllwild, CA

A magnitude 2.8 earthquake struck 10km SSW of Idyllwild, CA on Tue, Oct 19, 2021, 12:11 PM PDT (19:11 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M3.6 7km S of Lytle Creek, 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 · ±0.213 · 21 stations
2.5	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed · ±0.059 · 38 stations

30 people reported to the USGS what they felt; the strongest reported shaking was III, 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: 109 in the 60 days after this one and 66 in the 30 days before it.

The first 60 of 109.

From the USGS Earthquake Hazards Program and its partner networks, event ci39837511 (also filed as us6000fvyi). Read Sun, Oct 4, 2026, 8:39 AM UTC.