M1.6 earthquake 4km WNW of Idyllwild, CA

A magnitude 1.6 earthquake struck 4km WNW of Idyllwild, CA on Fri, Sep 3, 2021, 8:10 PM PDT (03:10 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M3.4 10km NNW of Anza, CA. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

1 person reported to the USGS what they felt; the strongest reported shaking was I, not felt 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: 133 in the 60 days after this one and 51 in the 30 days before it.

The first 60 of 133.

From the USGS Earthquake Hazards Program and its partner networks, event ci40032088. Read Sun, Oct 4, 2026, 3:02 AM UTC.