M3.1 earthquake 10 km SSW of Alderpoint, California

A magnitude 3.1 earthquake struck 10 km SSW of Alderpoint, California on Mon, Jan 29, 1979, 5:27 PM PST (01:27 UTC), 9 km (6 mi) below the surface.

A larger quake followed: M3.3 25 km SSW of Ferndale, 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: 99 in the 60 days after this one and 51 in the 30 days before it.

The first 60 of 99.

From the USGS Earthquake Hazards Program and its partner networks, event nc1044396. Read Tue, Sep 22, 2026, 10:59 AM UTC.