Chile earthquakes

M4.6 earthquake 84 km WSW of San Antonio, Chile

A magnitude 4.6 earthquake struck 84 km WSW of San Antonio, Chile on Thu, Apr 18, 1985, 8:02 AM GMT-4 (12:02 UTC), 33 km (21 mi) below the surface.

A larger quake followed: M5.6 71 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
4.6 (mb), light
Local time
UTC
1985-04-18 12:02:03 UTC
Depth
33.0 km (20.5 mi), shallow
Epicenter
33.947° S, 72.415° 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 1.6 and up: 24 in the 60 days after this one and 30 in the 30 days before it.

After

  1. 4.574 km W of Valparaíso, Chile · 15137 days ago · 33 km deep · 87 km away
  2. 4.664 km W of San Antonio, Chile · 15136 days ago · 33 km deep · 34 km away
  3. 4.342 km WSW of San Antonio, Chile · 15136 days ago · 33 km deep · 42 km away
  4. 4.960 km W of Cartagena, Chile · 15136 days ago · 33 km deep · 57 km away
  5. 4.359 km W of Cartagena, Chile · 15136 days ago · 33 km deep · 50 km away
  6. 4.776 km W of Cartagena, Chile · 15136 days ago · 33 km deep · 48 km away
  7. 4.190 km N of Constitución, Chile · 15124 days ago · 33 km deep · 64 km away
  8. 4.7Off the coast of Valparaiso, Chile · 15115 days ago · 33 km deep · 49 km away
  9. 5.4109 km WNW of Santa Cruz, Chile · 15111 days ago · 33 km deep · 37 km away
  10. 4.7136 km NNW of Constitución, Chile · 15109 days ago · 33 km deep · 82 km away
  11. 4.583 km WSW of San Antonio, Chile · 15109 days ago · 33 km deep · 5 km away
  12. 5.671 km WSW of San Antonio, Chile · 15109 days ago · 33 km deep · 13 km away
  13. 4.982 km WSW of San Antonio, Chile · 15109 days ago · 33 km deep · 7 km away
  14. 4.678 km WSW of San Antonio, Chile · 15108 days ago · 33 km deep · 12 km away
  15. 4.953 km W of Cartagena, Chile · 15107 days ago · 33 km deep · 55 km away
  16. 4.638 km W of San Antonio, Chile · 15107 days ago · 33 km deep · 52 km away
  17. 4.569 km WNW of Cartagena, Chile · 15104 days ago · 33 km deep · 62 km away
  18. 4.661 km WNW of Cartagena, Chile · 15103 days ago · 56 km deep · 71 km away
  19. 4.6107 km WSW of San Antonio, Chile · 15098 days ago · 33 km deep · 23 km away
  20. 3.539 km WSW of Valparaíso, Chile · 15095 days ago · 33 km deep · 90 km away
  21. 3.990 km W of San Antonio, Chile · 15092 days ago · 33 km deep · 34 km away
  22. 4.650 km SW of Valparaíso, Chile · 15088 days ago · 33 km deep · 79 km away
  23. 5.333 km SW of Valparaíso, Chile · 15087 days ago · 37 km deep · 92 km away
  24. 3.964 km WNW of Cartagena, Chile · 15087 days ago · 27 km deep · 63 km away

Before

  1. 4.674 km WSW of Valparaíso, Chile · 15141 days ago · 33 km deep · 85 km away
  2. 4.868 km W of Valparaíso, Chile · 15142 days ago · 33 km deep · 92 km away
  3. 4.297 km WSW of San Antonio, Chile · 15142 days ago · 33 km deep · 13 km away
  4. 4.571 km SW of San Antonio, Chile · 15142 days ago · 33 km deep · 26 km away
  5. 4.562 km W of San Antonio, Chile · 15143 days ago · 33 km deep · 36 km away
  6. 5.633 km WNW of Cartagena, Chile · 15143 days ago · 33 km deep · 66 km away
  7. 4.855 km SW of San Antonio, Chile · 15143 days ago · 33 km deep · 36 km away
  8. 3.5124 km W of Cartagena, Chile · 15145 days ago · 33 km deep · 66 km away
  9. 3.379 km SW of San Antonio, Chile · 15145 days ago · 33 km deep · 12 km away
  10. 3.272 km WSW of San Antonio, Chile · 15146 days ago · 33 km deep · 14 km away
  11. 4.066 km SW of San Antonio, Chile · 15146 days ago · 33 km deep · 20 km away
  12. 3.010 km N of Cartagena, Chile · 15146 days ago · 33 km deep · 91 km away
  13. 4.274 km WSW of San Antonio, Chile · 15148 days ago · 33 km deep · 11 km away
  14. 7.259 km S of San Antonio, Chile · 15149 days ago · 38 km deep · 76 km away
  15. 4.943 km WSW of Valparaíso, Chile · 15155 days ago · 33 km deep · 95 km away
  16. 4.271 km W of Cartagena, Chile · 15157 days ago · 33 km deep · 50 km away
  17. 4.765 km WSW of Valparaíso, Chile · 15158 days ago · 33 km deep · 80 km away
  18. 4.680 km WNW of Santa Cruz, Chile · 15160 days ago · 33 km deep · 44 km away
  19. 4.7105 km WNW of Santa Cruz, Chile · 15161 days ago · 33 km deep · 40 km away
  20. 4.280 km SW of San Antonio, Chile · 15163 days ago · 10 km deep · 25 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event usp0002dx4. Read Tue, Sep 29, 2026, 6:52 PM UTC.