M4.2 earthquake 83 km W of Illapel, Chile

A magnitude 4.2 earthquake struck 83 km W of Illapel, Chile on Tue, Oct 20, 2015, 11:12 PM GMT-3 (02:12 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.5 79 km W of La Ligua, Chile. 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.

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Reviewed by a seismologist.

Distance and direction from each place to the epicenter, with its forecast.

Within 100 km, magnitude 1.5 and up: 45 in the 60 days after this one and 147 in the 30 days before it.

From the USGS Earthquake Hazards Program and its partner networks, event us10003q4e. Read Tue, Sep 22, 2026, 7:51 AM UTC.