M4.1 earthquake 8km W of Morongo Valley, CA

A magnitude 4.1 earthquake struck 8km W of Morongo Valley, CA on Wed, Nov 10, 1982, 3:21 AM PST (11:21 UTC), 10 km (6 mi) below the surface.

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
4.09	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · 10 stations
4.1	mb, body-wave	USGS National Earthquake Information Center	Reviewed · 1 stations

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

Felt (V) at Big Bear Lake, Desert Hot Springs, Morongo Valley and White Water. Felt in parts of Riverside and San Bernardino counties.

From the USGS event page for ci510043. 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: 197 in the 60 days after this one and 136 in the 30 days before it.

The first 60 of 197.

From the USGS Earthquake Hazards Program and its partner networks, event ci510043 (also filed as usp0001qtp). Read Thu, Oct 1, 2026, 2:09 PM UTC.