M4.2 earthquake 112 km WSW of Illapel, Chile

A magnitude 4.2 earthquake struck 112 km WSW of Illapel, Chile on Sun, Sep 20, 2015, 6:20 AM GMT-3 (09:20 UTC), 5 km (3 mi) below the surface.

A larger quake followed: M4.3 135 km W of Illapel, 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: 150 in the 60 days after this one and 49 in the 30 days before it.

The first 60 of 150.

From the USGS Earthquake Hazards Program and its partner networks, event us20003m5d. Read Mon, Sep 21, 2026, 11:34 PM UTC.