M5.7 earthquake 85 km SW of San Antonio, Chile

A magnitude 5.7 earthquake struck 85 km SW of San Antonio, Chile on Mon, Mar 4, 1985, 2:09 PM GMT-3 (17:09 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.8 65 km W of San Antonio, Chile. This one was a foreshock.

Map

Where this earthquake was located, with the others nearby. Select one for its page.

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

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 2.5 and up: 88 in the 60 days after this one and 31 in the 30 days before it.

The first 60 of 88.

From the USGS Earthquake Hazards Program and its partner networks, event usp0002ceg. Read Tue, Sep 22, 2026, 10:41 AM UTC.