M1.6 earthquake 17 km S of Three Rocks, California

A magnitude 1.6 earthquake struck 17 km S of Three Rocks, California on Thu, May 5, 1988, 5:24 AM PDT (12:24 UTC), 4 km (2 mi) below the surface.

A larger quake followed: M3.4 10 km S of Tres Pinos, 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: 130 in the 60 days after this one and 46 in the 30 days before it.

The first 60 of 130.

From the USGS Earthquake Hazards Program and its partner networks, event nc116709. Read Sat, Oct 3, 2026, 10:10 AM UTC.