Chile earthquakes

M4.0 earthquake 42 km SW of Calama, Chile

A magnitude 4.0 earthquake struck 42 km SW of Calama, Chile on Fri, Oct 20, 2017, 4:27 PM GMT-3 (19:27 UTC), 87 km (54 mi) below the surface.

A larger quake followed: M4.8 45 km NE of Calama, Chile. This one was a foreshock.

Calama 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
4.0 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2017-10-20 19:27:38 UTC
Depth
87.2 km (54.2 mi), intermediate-depth
Epicenter
22.760° S, 69.172° 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 3.9 km horizontally, 6.7 km in depth
Magnitude uncertainty
±0.30
Depth from
From location
Station coverage gap
67°
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: 9 in the 60 days after this one and 4 in the 30 days before it.

After

  1. 4.172 km S of Calama, Chile · 3265 days ago · 100 km deep · 41 km away
  2. 4.032 km SSE of Calama, Chile · 3259 days ago · 98 km deep · 33 km away
  3. 4.566 km NE of Antofagasta, Chile · 3254 days ago · 53 km deep · 95 km away
  4. 4.845 km NE of Calama, Chile · 3250 days ago · 125 km deep · 88 km away
  5. 4.142 km NE of Calama, Chile · 3249 days ago · 134 km deep · 85 km away
  6. 4.558 km NNE of Calama, Chile · 3239 days ago · 117 km deep · 99 km away
  7. 4.0103 km SW of San Pedro de Atacama, Chile · 3230 days ago · 130 km deep · 90 km away
  8. 4.041 km S of Calama, Chile · 3217 days ago · 110 km deep · 31 km away
  9. 4.170 km S of Calama, Chile · 3215 days ago · 97 km deep · 45 km away

Before

  1. 4.5Antofagasta, Chile · 3273 days ago · 112 km deep · 21 km away
  2. 5.542 km ENE of Calama, Chile · 3283 days ago · 110 km deep · 79 km away · felt by 5
  3. 4.433 km NE of Calama, Chile · 3285 days ago · 107 km deep · 76 km away
  4. 4.4121 km E of Antofagasta, Chile · 3287 days ago · 96 km deep · 94 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000auus. Read Thu, Oct 1, 2026, 4:19 AM UTC.