Chile earthquakes

M4.3 earthquake 42 km WSW of San Antonio, Chile

A magnitude 4.3 earthquake struck 42 km WSW of San Antonio, Chile on Sun, Apr 21, 1985, 12:29 PM GMT-4 (16:29 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M4.9 60 km W of Cartagena, 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
4.3 (mb), light
Local time
UTC
1985-04-21 16:29:39 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
33.803° S, 71.997° 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.

Depth from
OPERATOR_ASSIGNED

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 23 in the 60 days after this one and 33 in the 30 days before it.

After

  1. 4.960 km W of Cartagena, Chile · 15129 days ago · 33 km deep · 45 km away
  2. 4.359 km W of Cartagena, Chile · 15129 days ago · 33 km deep · 40 km away
  3. 4.776 km W of Cartagena, Chile · 15129 days ago · 33 km deep · 52 km away
  4. 5.613 km WNW of Valparaíso, Chile · 15123 days ago · 33 km deep · 92 km away
  5. 4.190 km N of Constitución, Chile · 15117 days ago · 33 km deep · 92 km away
  6. 4.7Off the coast of Valparaiso, Chile · 15109 days ago · 33 km deep · 20 km away
  7. 4.942 km W of Valparaíso, Chile · 15106 days ago · 33 km deep · 81 km away
  8. 5.4109 km WNW of Santa Cruz, Chile · 15104 days ago · 33 km deep · 68 km away
  9. 4.583 km WSW of San Antonio, Chile · 15102 days ago · 33 km deep · 41 km away
  10. 5.671 km WSW of San Antonio, Chile · 15102 days ago · 33 km deep · 29 km away
  11. 4.982 km WSW of San Antonio, Chile · 15102 days ago · 33 km deep · 39 km away
  12. 4.678 km WSW of San Antonio, Chile · 15101 days ago · 33 km deep · 38 km away
  13. 4.953 km W of Cartagena, Chile · 15100 days ago · 33 km deep · 38 km away
  14. 4.638 km W of San Antonio, Chile · 15100 days ago · 33 km deep · 22 km away
  15. 4.569 km WNW of Cartagena, Chile · 15097 days ago · 33 km deep · 55 km away
  16. 4.661 km WNW of Cartagena, Chile · 15096 days ago · 56 km deep · 56 km away
  17. 4.6107 km WSW of San Antonio, Chile · 15091 days ago · 33 km deep · 65 km away
  18. 3.539 km WSW of Valparaíso, Chile · 15088 days ago · 33 km deep · 66 km away
  19. 3.990 km W of San Antonio, Chile · 15085 days ago · 33 km deep · 56 km away
  20. 4.650 km SW of Valparaíso, Chile · 15081 days ago · 33 km deep · 57 km away
  21. 5.333 km SW of Valparaíso, Chile · 15080 days ago · 37 km deep · 63 km away
  22. 3.964 km WNW of Cartagena, Chile · 15080 days ago · 27 km deep · 52 km away
  23. 4.461 km W of San Antonio, Chile · 15071 days ago · 33 km deep · 31 km away

Before

  1. 4.664 km W of San Antonio, Chile · 15129 days ago · 33 km deep · 32 km away
  2. 4.574 km W of Valparaíso, Chile · 15130 days ago · 33 km deep · 81 km away
  3. 4.684 km WSW of San Antonio, Chile · 15132 days ago · 33 km deep · 42 km away
  4. 4.674 km WSW of Valparaíso, Chile · 15134 days ago · 33 km deep · 79 km away
  5. 4.868 km W of Valparaíso, Chile · 15135 days ago · 33 km deep · 83 km away
  6. 4.853 km W of Valparaíso, Chile · 15135 days ago · 33 km deep · 87 km away
  7. 4.297 km WSW of San Antonio, Chile · 15135 days ago · 33 km deep · 54 km away
  8. 4.571 km SW of San Antonio, Chile · 15135 days ago · 33 km deep · 31 km away
  9. 4.562 km W of San Antonio, Chile · 15136 days ago · 33 km deep · 32 km away
  10. 5.633 km WNW of Cartagena, Chile · 15136 days ago · 33 km deep · 35 km away
  11. 4.855 km SW of San Antonio, Chile · 15137 days ago · 33 km deep · 17 km away
  12. 3.5124 km W of Cartagena, Chile · 15138 days ago · 33 km deep · 93 km away
  13. 3.379 km SW of San Antonio, Chile · 15138 days ago · 33 km deep · 36 km away
  14. 3.359 km W of Valparaíso, Chile · 15139 days ago · 33 km deep · 97 km away
  15. 3.272 km WSW of San Antonio, Chile · 15139 days ago · 33 km deep · 30 km away
  16. 4.066 km SW of San Antonio, Chile · 15139 days ago · 33 km deep · 24 km away
  17. 3.010 km N of Cartagena, Chile · 15139 days ago · 33 km deep · 52 km away
  18. 4.274 km WSW of San Antonio, Chile · 15141 days ago · 33 km deep · 32 km away
  19. 7.259 km S of San Antonio, Chile · 15142 days ago · 38 km deep · 51 km away
  20. 5.032 km W of Valparaíso, Chile · 15142 days ago · 33 km deep · 87 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002e08. Read Tue, Sep 22, 2026, 9:25 PM UTC.