Chile earthquakes

M4.0 earthquake 76 km W of Illapel, Chile

A magnitude 4.0 earthquake struck 76 km W of Illapel, Chile on Sat, Oct 17, 2015, 5:32 PM GMT-3 (20:32 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M4.1 104 km WNW of Illapel, Chile. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
4.0 (mwr), light
Local time
UTC
2015-10-17 20:32:06 UTC
Depth
15.6 km (9.7 mi), shallow
Epicenter
31.744° S, 71.971° W
Region
Chile
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

Fault motion and ground failure

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

Faulting
Reverse (thrust)
Moment magnitude
4.0 Mwr
Nodal plane 1
Strike 22°, dip 34°, rake 110°
Nodal plane 2
Strike 178°, dip 58°, rake 77°

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 2.2 km horizontally, 3.7 km in depth
Magnitude uncertainty
±0.07
Depth from
From location
Station coverage gap
139°
Stations used
54

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 46 in the 60 days after this one and 153 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us10003pee. Read Wed, Sep 23, 2026, 11:19 PM UTC.