M1.7 earthquake 4km SW of Idyllwild, CA

A magnitude 1.7 earthquake struck 4km SW of Idyllwild, CA on Tue, Apr 30, 1985, 8:32 PM PDT (03:32 UTC), 13 km (8 mi) below the surface.

A larger quake followed: M1.8 10km SW of Anza, CA. This one was a foreshock.

Map

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

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: 181 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 181.

From the USGS Earthquake Hazards Program and its partner networks, event ci65352. Read Tue, Sep 22, 2026, 8:51 PM UTC.