Chile earthquakes

M4.5 earthquake 83 km SW of San Antonio, Chile

A magnitude 4.5 earthquake struck 83 km SW of San Antonio, Chile on Wed, Apr 21, 2021, 4:08 AM GMT-4 (08:08 UTC), 10 km (6 mi) below the surface.

A larger quake followed: M5.5 82 km WSW of San Antonio, Chile. This one was a foreshock.

San Antonio 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
4.5 (mb, body-wave), light
Magnitude from
USGS National Earthquake Information Center
Local time
UTC
2021-04-21 08:08:22 UTC
Depth
10.0 km (6.2 mi), shallow
Epicenter
34.035° S, 72.334° 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 4.6 km horizontally, 1.6 km in depth
Magnitude uncertainty
±0.14
Depth from
Operator assigned
Station coverage gap
186°, poorly surrounded by stations
Stations used
37

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 21 in the 60 days after this one and 7 in the 30 days before it.

After

  1. 4.479 km SW of San Antonio, Chile · 1991 days ago · 10 km deep · 8 km away
  2. 5.582 km WSW of San Antonio, Chile · 1990 days ago · 13 km deep · 6 km away · felt by 37
  3. 4.484 km SW of San Antonio, Chile · 1990 days ago · 10 km deep · 1 km away · felt by 5
  4. 4.286 km SW of San Antonio, Chile · 1990 days ago · 10 km deep · 4 km away
  5. 4.184 km WSW of San Antonio, Chile · 1989 days ago · 10 km deep · 6 km away
  6. 4.284 km WSW of San Antonio, Chile · 1989 days ago · 10 km deep · 5 km away · felt by 2
  7. 4.191 km WSW of San Antonio, Chile · 1989 days ago · 10 km deep · 10 km away
  8. 4.287 km SW of San Antonio, Chile · 1989 days ago · 10 km deep · 4 km away · felt by 1
  9. 4.187 km SW of San Antonio, Chile · 1989 days ago · 10 km deep · 5 km away
  10. 4.082 km SW of San Antonio, Chile · 1989 days ago · 10 km deep · 1 km away · felt by 1
  11. 4.7Near the coast of Libertador O'Higgins, Chile · 1984 days ago · 13 km deep · 3 km away
  12. 4.288 km WSW of San Antonio, Chile · 1984 days ago · 10 km deep · 7 km away
  13. 4.178 km SW of San Antonio, Chile · 1983 days ago · 23 km deep · 5 km away
  14. 4.1103 km NW of Constitución, Chile · 1978 days ago · 19 km deep · 94 km away
  15. 4.579 km WSW of San Antonio, Chile · 1978 days ago · 10 km deep · 15 km away · felt by 1
  16. 4.332 km W of San Antonio, Chile · 1945 days ago · 31 km deep · 60 km away
  17. 4.354 km WSW of San Antonio, Chile · 1939 days ago · 23 km deep · 37 km away · felt by 3
  18. 5.157 km WSW of San Antonio, Chile · 1939 days ago · 15 km deep · 35 km away · felt by 26
  19. 4.566 km SW of San Antonio, Chile · 1936 days ago · 18 km deep · 17 km away · felt by 2
  20. 4.324 km NNW of Cartagena, Chile · 1935 days ago · 29 km deep · 97 km away · felt by 39
  21. 4.389 km WSW of San Antonio, Chile · 1933 days ago · 10 km deep · 22 km away · felt by 1

Before

  1. 4.478 km WSW of San Antonio, Chile · 1993 days ago · 10 km deep · 11 km away · felt by 5
  2. 4.281 km WSW of San Antonio, Chile · 1993 days ago · 10 km deep · 7 km away · felt by 1
  3. 4.281 km WSW of San Antonio, Chile · 1993 days ago · 3 km deep · 7 km away
  4. 5.079 km WSW of San Antonio, Chile · 1993 days ago · 10 km deep · 8 km away · felt by 17
  5. 5.181 km WSW of San Antonio, Chile · 1993 days ago · 10 km deep · 8 km away · felt by 17
  6. 5.285 km WSW of San Antonio, Chile · 1993 days ago · 9 km deep · 9 km away · felt by 23
  7. 5.185 km WSW of San Antonio, Chile · 1993 days ago · 13 km deep · 10 km away · felt by 42

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us6000e3e3. Read Sat, Oct 3, 2026, 8:11 AM UTC.