M4.6 earthquake 66 km SW of San Antonio, Chile
A magnitude 4.6 earthquake struck 66 km SW of San Antonio, Chile on Mon, Mar 18, 1985, 8:33 PM GMT-4 (00:33 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M7.2 59 km S of San Antonio, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.6 (mb), light
- Local time
- UTC
- 1985-03-19 00:33:05 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 34.007° S, 72.129° 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: 41 in the 60 days after this one and 102 in the 30 days before it.
After
- 4.684 km WNW of Santa Cruz, Chile · 15170 days ago · 33 km deep · 52 km away
- 4.480 km WSW of Valparaíso, Chile · 15170 days ago · 33 km deep · 83 km away
- 4.738 km WNW of Cartagena, Chile · 15169 days ago · 33 km deep · 72 km away
- 5.223 km NW of Cartagena, Chile · 15169 days ago · 33 km deep · 73 km away
- 5.173 km WNW of Santa Cruz, Chile · 15166 days ago · 33 km deep · 43 km away
- 3.597 km W of Cartagena, Chile · 15166 days ago · 33 km deep · 74 km away
- 5.776 km NW of Santa Cruz, Chile · 15165 days ago · 57 km deep · 24 km away
- 5.658 km WSW of Valparaíso, Chile · 15165 days ago · 53 km deep · 85 km away
- 5.789 km WNW of Santa Cruz, Chile · 15164 days ago · 26 km deep · 38 km away
- 6.586 km WNW of Santa Cruz, Chile · 15164 days ago · 45 km deep · 28 km away
- 4.7101 km SW of San Antonio, Chile · 15164 days ago · 33 km deep · 36 km away
- 4.5117 km N of Constitución, Chile · 15163 days ago · 33 km deep · 57 km away
- 4.280 km SW of San Antonio, Chile · 15163 days ago · 10 km deep · 14 km away
- 4.7105 km WNW of Santa Cruz, Chile · 15161 days ago · 33 km deep · 44 km away
- 4.680 km WNW of Santa Cruz, Chile · 15160 days ago · 33 km deep · 27 km away
- 4.765 km WSW of Valparaíso, Chile · 15158 days ago · 33 km deep · 87 km away
- 4.271 km W of Cartagena, Chile · 15157 days ago · 33 km deep · 61 km away
- 4.943 km WSW of Valparaíso, Chile · 15155 days ago · 33 km deep · 96 km away
- 7.259 km S of San Antonio, Chile · 15149 days ago · 38 km deep · 49 km away
- 4.274 km WSW of San Antonio, Chile · 15148 days ago · 33 km deep · 16 km away
- 3.010 km N of Cartagena, Chile · 15146 days ago · 33 km deep · 77 km away
- 4.066 km SW of San Antonio, Chile · 15146 days ago · 33 km deep · 9 km away
- 3.272 km WSW of San Antonio, Chile · 15146 days ago · 33 km deep · 13 km away
- 3.379 km SW of San Antonio, Chile · 15145 days ago · 33 km deep · 17 km away
- 3.5124 km W of Cartagena, Chile · 15145 days ago · 33 km deep · 91 km away
- 4.855 km SW of San Antonio, Chile · 15143 days ago · 33 km deep · 11 km away
- 5.633 km WNW of Cartagena, Chile · 15143 days ago · 33 km deep · 59 km away
- 4.562 km W of San Antonio, Chile · 15143 days ago · 33 km deep · 43 km away
- 4.571 km SW of San Antonio, Chile · 15142 days ago · 33 km deep · 5 km away
- 4.297 km WSW of San Antonio, Chile · 15142 days ago · 33 km deep · 36 km away
- 4.674 km WSW of Valparaíso, Chile · 15141 days ago · 33 km deep · 96 km away
- 4.684 km WSW of San Antonio, Chile · 15139 days ago · 33 km deep · 27 km away
- 4.574 km W of Valparaíso, Chile · 15137 days ago · 33 km deep · 98 km away
- 4.664 km W of San Antonio, Chile · 15136 days ago · 33 km deep · 42 km away
- 4.342 km WSW of San Antonio, Chile · 15136 days ago · 33 km deep · 26 km away
- 4.960 km W of Cartagena, Chile · 15136 days ago · 33 km deep · 62 km away
- 4.359 km W of Cartagena, Chile · 15136 days ago · 33 km deep · 56 km away
- 4.776 km W of Cartagena, Chile · 15136 days ago · 33 km deep · 62 km away
- 4.190 km N of Constitución, Chile · 15124 days ago · 33 km deep · 66 km away
- 4.7Off the coast of Valparaiso, Chile · 15116 days ago · 33 km deep · 42 km away
- 5.4109 km WNW of Santa Cruz, Chile · 15111 days ago · 33 km deep · 43 km away
Before
- 5.0near the coast of central Chile · 15170 days ago · 33 km deep · 68 km away
- 4.4100 km W of San Antonio, Chile · 15171 days ago · 33 km deep · 67 km away
- 4.697 km W of Cartagena, Chile · 15172 days ago · 33 km deep · 83 km away
- 4.546 km SW of Valparaíso, Chile · 15173 days ago · 33 km deep · 81 km away
- 3.041 km SW of San Antonio, Chile · 15173 days ago · 33 km deep · 26 km away
- 2.763 km WSW of Valparaíso, Chile · 15174 days ago · 33 km deep · 79 km away
- 3.0106 km WSW of San Antonio, Chile · 15174 days ago · 33 km deep · 57 km away
- 4.493 km WNW of Cartagena, Chile · 15175 days ago · 33 km deep · 82 km away
- 3.577 km WSW of Valparaíso, Chile · 15175 days ago · 33 km deep · 91 km away
- 4.351 km WSW of Valparaíso, Chile · 15175 days ago · 33 km deep · 97 km away
- 3.096 km WSW of San Antonio, Chile · 15176 days ago · 33 km deep · 48 km away
- 4.396 km W of Cartagena, Chile · 15176 days ago · 33 km deep · 81 km away
- 5.273 km WSW of Valparaíso, Chile · 15176 days ago · 33 km deep · 84 km away
- 3.368 km WSW of Valparaíso, Chile · 15177 days ago · 33 km deep · 81 km away
- 3.527 km S of Valparaíso, Chile · 15178 days ago · 66 km deep · 94 km away
- 3.6111 km WSW of San Antonio, Chile · 15178 days ago · 33 km deep · 47 km away
- 4.955 km WSW of San Antonio, Chile · 15179 days ago · 33 km deep · 17 km away
- 4.379 km W of Cartagena, Chile · 15179 days ago · 33 km deep · 67 km away
- 3.476 km W of San Antonio, Chile · 15179 days ago · 33 km deep · 46 km away
- 3.081 km SW of San Antonio, Chile · 15179 days ago · 33 km deep · 19 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0002d0z. Read Tue, Sep 29, 2026, 7:20 PM UTC.