M3.1 earthquake 4 km ESE of Interlaken, California

A magnitude 3.1 earthquake struck 4 km ESE of Interlaken, California on Tue, Dec 7, 1982, 3:05 PM PST (23:05 UTC), 12 km (7 mi) below the surface.

A larger quake followed: M4.2 37 km SSW of South Dos Palos, California. 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
3.1	ML, local (Richter)	Northern California Seismic System	Preferred · Final · 0 stations
3.1	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

The USGS’s account of the effects of this earthquake.

Felt at Watsonville.

From the USGS event page for nc1082777. U.S. Geological Survey text and figures are in the public domain.

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: 125 in the 60 days after this one and 64 in the 30 days before it.

The first 60 of 125.

From the USGS Earthquake Hazards Program and its partner networks, event nc1082777 (also filed as usp0001rag). Read Thu, Oct 1, 2026, 11:49 AM UTC.