Chile earthquakes

M4.0 earthquake 44 km W of Iquique, Chile

A magnitude 4.0 earthquake struck 44 km W of Iquique, Chile on Sun, Oct 17, 2021, 11:51 PM GMT-3 (02:51 UTC), 25 km (15 mi) below the surface.

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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, regional moment), light
Magnitude from: USGS National Earthquake Information Center
Local time: Sun, Oct 17, 2021, 11:51 PM GMT-3
UTC: 2021-10-18 02:51:29 UTC
Depth: 24.6 km (15.3 mi), shallow
Epicenter: 20.185° S, 70.571° W
Region: Chile
Felt reports: 4
Tsunami flag: No
Status: Reviewed by a seismologist

Did you feel it?

4 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

Did You Feel It? map: shaking reported by the public — Shaking reported by the public, by area. Map: USGS Did You Feel It?

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 350°, dip 22°, rake 88°
Nodal plane 2: Strike 172°, dip 68°, rake 91°

How well it is located

Reviewed by a seismologist.

Location uncertainty: About 2.0 km horizontally, 5.3 km in depth
Magnitude uncertainty: ±0.05
Depth from: From location
Station coverage gap: 161°
Stations used: 38

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 4 in the 30 days before it.

After

Before

Earthquakes today Chile earthquakes Live radar here

Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000fvja. Read Sat, Oct 3, 2026, 12:00 AM UTC.