M1.7 earthquake 4km SSW of Compton, CA

A magnitude 1.7 earthquake struck 4km SSW of Compton, CA on Sat, May 4, 1985, 1:08 AM PDT (08:08 UTC), 6 km (3 mi) below the surface.

A larger quake followed: M2.7 4km NE of Carson, 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: 95 in the 60 days after this one and 73 in the 30 days before it.

The first 60 of 95.

From the USGS Earthquake Hazards Program and its partner networks, event ci66067. Read Wed, Sep 23, 2026, 1:48 AM UTC.