M3.9 earthquake 93 km WSW of Illapel, Chile

A magnitude 3.9 earthquake struck 93 km WSW of Illapel, Chile on Thu, Sep 17, 2015, 9:46 PM GMT-3 (00:46 UTC), 20 km (13 mi) below the surface.

A larger quake followed: M4.1 Off the coast of Coquimbo, 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: 200 in the 60 days after this one and 0 in the 30 days before it.

The first 60 of 200.

From the USGS Earthquake Hazards Program and its partner networks, event us20003l1d. Read Wed, Sep 23, 2026, 7:28 AM UTC.