Chile earthquakes

M3.9 earthquake 38 km ESE of Arica, Chile

A magnitude 3.9 earthquake struck 38 km ESE of Arica, Chile on Sun, Oct 15, 2017, 9:19 PM GMT-3 (00:19 UTC), 89 km (56 mi) below the surface.

A larger quake followed: M4.7 84 km S of Arica, Chile. This one was a foreshock.

Arica forecastMore in Chile

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
2017-10-16 00:19:38 UTC
Depth
89.3 km (55.5 mi), intermediate-depth
Epicenter
18.620° S, 69.964° 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 6.8 km horizontally, 7.6 km in depth
Magnitude uncertainty
±0.26
Depth from
From location
Station coverage gap
85°
Stations used
42

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 4.312 km E of Palca, Peru · 3240 days ago · 153 km deep · 97 km away
  2. 4.784 km S of Arica, Chile · 3216 days ago · 62 km deep · 75 km away · felt by 3
  3. 4.283 km E of Arica, Chile · 3212 days ago · 136 km deep · 48 km away

Before

  1. 4.147 km ESE of Arica, Chile · 3275 days ago · 102 km deep · 10 km away
  2. 4.856 km ESE of Arica, Chile · 3278 days ago · 94 km deep · 20 km away
  3. 4.459 km ESE of Arica, Chile · 3278 days ago · 91 km deep · 23 km away
  4. 6.358 km E of Arica, Chile · 3278 days ago · 85 km deep · 23 km away · felt by 82
  5. 3.977 km ESE of Palca, Peru · 3294 days ago · 147 km deep · 99 km away
  6. 4.723 km SE of Tacna, Peru · 3297 days ago · 98 km deep · 54 km away · felt by 1
  7. 4.1114 km NE of Iquique, Chile · 3299 days ago · 98 km deep · 98 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000aslx. Read Wed, Sep 30, 2026, 10:22 PM UTC.