Chile earthquakes

M4.0 earthquake 28 km ENE of Calama, Chile

A magnitude 4.0 earthquake struck 28 km ENE of Calama, Chile on Tue, Sep 28, 2021, 5:15 AM GMT-3 (08:15 UTC), 126 km (78 mi) below the surface.

A larger quake followed: M4.7 99 km NNE 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
2021-09-28 08:15:59 UTC
Depth
125.6 km (78.0 mi), intermediate-depth
Epicenter
22.392° S, 68.659° 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 5.7 km horizontally, 5.2 km in depth
Magnitude uncertainty
±0.26
Depth from
From location
Station coverage gap
50°
Stations used
27

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 10 in the 60 days after this one and 3 in the 30 days before it.

After

  1. 4.1101 km NNE of Calama, Chile · 1828 days ago · 130 km deep · 85 km away
  2. 4.799 km NNE of Calama, Chile · 1827 days ago · 103 km deep · 81 km away
  3. 4.374 km N of Calama, Chile · 1820 days ago · 105 km deep · 69 km away
  4. 4.386 km NNE of Calama, Chile · 1818 days ago · 126 km deep · 70 km away
  5. 4.344 km NW of Calama, Chile · 1807 days ago · 107 km deep · 61 km away · felt by 2
  6. 4.151 km NNE of Calama, Chile · 1805 days ago · 121 km deep · 38 km away
  7. 4.1106 km NNE of Calama, Chile · 1792 days ago · 128 km deep · 93 km away
  8. 4.355 km N of Calama, Chile · 1782 days ago · 119 km deep · 51 km away
  9. 4.539 km E of Calama, Chile · 1773 days ago · 112 km deep · 16 km away
  10. 4.434 km NNE of Calama, Chile · 1771 days ago · 125 km deep · 27 km away

Before

  1. 4.4103 km NNE of Calama, Chile · 1836 days ago · 105 km deep · 89 km away
  2. 4.339 km NE of Calama, Chile · 1843 days ago · 132 km deep · 21 km away
  3. 4.1107 km NE of Calama, Chile · 1851 days ago · 137 km deep · 88 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000ff4s. Read Sat, Oct 3, 2026, 1:13 AM UTC.