Chile earthquakes

M3.9 earthquake 121 km NNE of Calama, Chile

A magnitude 3.9 earthquake struck 121 km NNE of Calama, Chile on Fri, Jul 21, 2017, 1:53 PM GMT-4 (17:53 UTC), 146 km (91 mi) below the surface.

A larger quake followed: M5.3 142 km NE of Tocopilla, 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 (mb), minor
Local time
UTC
2017-07-21 17:53:00 UTC
Depth
146.1 km (90.8 mi), intermediate-depth
Epicenter
21.384° S, 68.688° 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.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 5.4 km horizontally, 9.3 km in depth
Magnitude uncertainty
±0.51
Depth from
From location
Station coverage gap
63°
Stations used
49

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 15 in the 60 days after this one and 7 in the 30 days before it.

After

Before

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us20009zbq. Read Wed, Sep 30, 2026, 8:34 PM UTC.