M2.5 earthquake 13 km SW of Aspen Springs, California

A magnitude 2.5 earthquake struck 13 km SW of Aspen Springs, California on Sat, Mar 23, 1985, 7:40 PM PST (03:40 UTC), 8 km (5 mi) below the surface.

A larger quake followed: M5.1 4 km NNW of Round Valley, California. 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: at least 200 in the 60 days after this one and 129 in the 30 days before it.

The first 60 of at least 200.

From the USGS Earthquake Hazards Program and its partner networks, event nc44607 (also filed as ci63140). Read Wed, Sep 30, 2026, 11:21 PM UTC.