M3.5 earthquake 16km NW of Morongo Valley, CA

A magnitude 3.5 earthquake struck 16km NW of Morongo Valley, CA on Wed, Jul 7, 1982, 1:44 AM PDT (08:44 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
3.46	ML, local (Richter)	Southern California Seismic Network	Preferred · Final · 11 stations
3.6	ML, local (Richter)	USGS National Earthquake Information Center	Reviewed

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

Felt at Palm Desert and Lucerne Valley.

From the USGS event page for ci505030. 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: 190 in the 60 days after this one and 199 in the 30 days before it.

The first 60 of 190.

From the USGS Earthquake Hazards Program and its partner networks, event ci505030 (also filed as usp0001nan). Read Thu, Oct 1, 2026, 10:49 PM UTC.