Chile earthquakes

M3.9 earthquake 93 km WNW of La Ligua, Chile

A magnitude 3.9 earthquake struck 93 km WNW of La Ligua, Chile on Tue, Sep 22, 2015, 7:01 AM GMT-3 (10:01 UTC), 16 km (10 mi) below the surface.

A larger quake followed: M4.4 Off the coast of Valparaiso, 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
3.9 (mwr), minor
Local time
UTC
2015-09-22 10:01:46 UTC
Depth
16.0 km (9.9 mi), shallow
Epicenter
32.132° S, 72.153° 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
3.9 Mwr
Nodal plane 1
Strike 17°, dip 25°, rake 107°
Nodal plane 2
Strike 179°, dip 66°, rake 82°

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 4.8 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.06
Depth from
From moment tensor inversion
Station coverage gap
193°, poorly surrounded by stations
Stations used
35

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 111 in the 60 days after this one and 88 in the 30 days before it.

After

The first 60 of 111.

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20003mtn. Read Mon, Sep 21, 2026, 8:22 PM UTC.