Chile earthquakes

M4.1 earthquake 40 km SW of Coquimbo, Chile

A magnitude 4.1 earthquake struck 40 km SW of Coquimbo, Chile on Thu, Aug 12, 2021, 12:37 AM GMT-4 (04:37 UTC), 38 km (24 mi) below the surface.

A larger quake followed: M4.5 31 km W of Coquimbo, Chile. This one was a foreshock.

Coquimbo 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
4.1 (Mwr, regional moment), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2021-08-12 04:37:34 UTC
Depth
38.4 km (23.9 mi), shallow
Epicenter
30.248° S, 71.587° 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
Oblique reverse
Moment magnitude
4.1 Mwr
Nodal plane 1
Strike 35°, dip 49°, rake 135°
Nodal plane 2
Strike 159°, dip 57°, rake 51°

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 6.3 km horizontally, 6.2 km in depth
Magnitude uncertainty
±0.05
Depth from
From location
Station coverage gap
187°, poorly surrounded by stations
Stations used
51

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 2 in the 30 days before it.

After

  1. 4.218 km W of Ovalle, Chile · 1861 days ago · 69 km deep · 40 km away · felt by 6
  2. 4.442 km NW of Coquimbo, Chile · 1860 days ago · 32 km deep · 58 km away
  3. 4.435 km WSW of Coquimbo, Chile · 1855 days ago · 25 km deep · 28 km away · felt by 1
  4. 4.255 km WSW of Ovalle, Chile · 1853 days ago · 24 km deep · 54 km away
  5. 4.263 km W of Coquimbo, Chile · 1847 days ago · 11 km deep · 46 km away
  6. 4.531 km W of Coquimbo, Chile · 1841 days ago · 20 km deep · 28 km away · felt by 2
  7. 4.46 km SSW of Coquimbo, Chile · 1834 days ago · 45 km deep · 34 km away · felt by 7
  8. 4.533 km WSW of Ovalle, Chile · 1833 days ago · 39 km deep · 53 km away

Before

  1. 4.633 km WSW of Coquimbo, Chile · 1887 days ago · 31 km deep · 21 km away · felt by 6
  2. 4.376 km WSW of Coquimbo, Chile · 1896 days ago · 10 km deep · 41 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000f4e8. Read Sun, Oct 4, 2026, 9:14 AM UTC.