M1.7 earthquake 12km WSW of Morongo Valley, CA

A magnitude 1.7 earthquake struck 12km WSW of Morongo Valley, CA on Mon, Nov 7, 1983, 3:15 AM PST (11:15 UTC), 14 km (9 mi) below the surface.

A larger quake followed: M3.6 2km NNW of Muscoy, CA. 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: 155 in the 60 days after this one and 170 in the 30 days before it.

The first 60 of 155.

From the USGS Earthquake Hazards Program and its partner networks, event ci21076. Read Mon, Oct 5, 2026, 7:34 AM UTC.