Chile earthquakes

M4.1 earthquake 81 km W of Illapel, Chile

A magnitude 4.1 earthquake struck 81 km W of Illapel, Chile on Wed, Sep 15, 2021, 1:07 AM GMT-3 (04:07 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M4.9 103 km WNW of La Ligua, 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
4.1 (Mwr, regional moment), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2021-09-15 04:07:54 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
31.741° S, 72.020° 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.

Fault motion and ground failure

How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.

Faulting
Reverse (thrust)
Moment magnitude
4.1 Mwr
Nodal plane 1
Strike 15°, dip 27°, rake 113°
Nodal plane 2
Strike 169°, dip 65°, rake 79°

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 3.5 km horizontally, 1.9 km in depth
Magnitude uncertainty
±0.05
Depth from
Operator assigned
Station coverage gap
161°
Stations used
40

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 12 in the 60 days after this one and 8 in the 30 days before it.

After

  1. 4.9103 km WNW of La Ligua, Chile · 1846 days ago · 11 km deep · 47 km away · felt by 17
  2. 4.4105 km WNW of La Ligua, Chile · 1845 days ago · 20 km deep · 53 km away · felt by 1
  3. 4.698 km WNW of La Ligua, Chile · 1845 days ago · 10 km deep · 44 km away · felt by 1
  4. 4.698 km WSW of Illapel, Chile · 1845 days ago · 10 km deep · 18 km away · felt by 7
  5. 4.689 km W of Illapel, Chile · 1827 days ago · 17 km deep · 10 km away · felt by 8
  6. 4.089 km W of Illapel, Chile · 1827 days ago · 18 km deep · 9 km away
  7. 4.389 km W of Illapel, Chile · 1816 days ago · 10 km deep · 11 km away · felt by 2
  8. 4.178 km W of Illapel, Chile · 1815 days ago · 18 km deep · 6 km away
  9. 4.483 km W of Illapel, Chile · 1815 days ago · 10 km deep · 4 km away · felt by 1
  10. 3.983 km W of Illapel, Chile · 1814 days ago · 16 km deep · 8 km away
  11. 4.280 km W of Illapel, Chile · 1812 days ago · 20 km deep · 10 km away · felt by 5
  12. 4.080 km WNW of Illapel, Chile · 1799 days ago · 12 km deep · 47 km away · felt by 4

Before

  1. 4.181 km WSW of Illapel, Chile · 1846 days ago · 20 km deep · 11 km away
  2. 4.489 km W of Illapel, Chile · 1847 days ago · 11 km deep · 10 km away
  3. 4.484 km W of Illapel, Chile · 1847 days ago · 10 km deep · 5 km away · felt by 2
  4. 4.875 km W of Illapel, Chile · 1847 days ago · 13 km deep · 7 km away · felt by 10
  5. 4.491 km W of Illapel, Chile · 1849 days ago · 5 km deep · 10 km away
  6. 4.383 km W of Illapel, Chile · 1849 days ago · 10 km deep · 4 km away
  7. 4.291 km W of Illapel, Chile · 1855 days ago · 19 km deep · 10 km away
  8. 4.8154 km NW of Valparaíso, Chile · 1859 days ago · 10 km deep · 89 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us7000fba9. Read Mon, Oct 5, 2026, 7:15 AM UTC.