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.

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
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

  1. 5.3142 km NE of Tocopilla, Chile · 3358 days ago · 39 km deep · 61 km away · felt by 6
  2. 4.676 km NE of Calama, Chile · 3356 days ago · 114 km deep · 61 km away
  3. 4.280 km NNE of Calama, Chile · 3347 days ago · 120 km deep · 55 km away
  4. 4.1116 km NNE of Calama, Chile · 3344 days ago · 144 km deep · 22 km away · felt by 1
  5. 4.0130 km N of Calama, Chile · 3342 days ago · 123 km deep · 13 km away
  6. 4.3137 km NNE of Calama, Chile · 3342 days ago · 128 km deep · 17 km away
  7. 4.0123 km ESE of Iquique, Chile · 3338 days ago · 93 km deep · 81 km away
  8. 4.4107 km NNE of Calama, Chile · 3336 days ago · 117 km deep · 15 km away
  9. 4.0161 km NNE of Calama, Chile · 3336 days ago · 136 km deep · 42 km away
  10. 4.2100 km NNE of Calama, Chile · 3334 days ago · 127 km deep · 39 km away
  11. 4.1138 km NNE of Calama, Chile · 3329 days ago · 122 km deep · 22 km away
  12. 4.5132 km N of Calama, Chile · 3320 days ago · 121 km deep · 18 km away
  13. 4.338 km NE of Calama, Chile · 3316 days ago · 131 km deep · 95 km away
  14. 4.1153 km N of Calama, Chile · 3314 days ago · 114 km deep · 36 km away
  15. 4.4130 km ESE of Iquique, Chile · 3311 days ago · 111 km deep · 73 km away

Before

  1. 4.5122 km N of Calama, Chile · 3366 days ago · 127 km deep · 1 km away
  2. 4.4154 km SW of Uyuni, Bolivia · 3376 days ago · 169 km deep · 75 km away
  3. 5.476 km NNE of Calama, Chile · 3377 days ago · 108 km deep · 51 km away
  4. 4.4156 km NNE of Calama, Chile · 3384 days ago · 136 km deep · 38 km away
  5. 4.0134 km N of Calama, Chile · 3386 days ago · 125 km deep · 19 km away
  6. 4.158 km NNE of Calama, Chile · 3386 days ago · 128 km deep · 65 km away
  7. 4.3145 km N of Calama, Chile · 3388 days ago · 105 km deep · 37 km away

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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.