M3.9 earthquake 52 km W of Illapel, Chile
A magnitude 3.9 earthquake struck 52 km W of Illapel, Chile on Sat, Oct 6, 1973, 7:53 AM GMT-3 (10:53 UTC), 50 km (31 mi) below the surface.
A larger quake followed: M4.1 51 km WNW of Illapel, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.9 (mb), minor
- Local time
- UTC
- 1973-10-06 10:53:11 UTC
- Depth
- 50.0 km (31.1 mi), shallow
- Epicenter
- 31.717° S, 71.710° 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.
- Stations used
- 11
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 6 in the 30 days before it.
After
- 4.151 km WNW of Illapel, Chile · 19344 days ago · 33 km deep · 25 km away
- 3.996 km W of Illapel, Chile · 19344 days ago · 33 km deep · 44 km away
- 5.258 km W of Illapel, Chile · 19341 days ago · 39 km deep · 10 km away
- 4.786 km WSW of Illapel, Chile · 19340 days ago · 46 km deep · 34 km away
- 4.580 km WSW of Illapel, Chile · 19338 days ago · 69 km deep · 35 km away
- 4.857 km NNW of Valparaíso, Chile · 19311 days ago · 33 km deep · 94 km away
- 4.634 km SW of Salamanca, Chile · 19303 days ago · 97 km deep · 53 km away
Before
- 4.455 km W of Illapel, Chile · 19344 days ago · 33 km deep · 3 km away
- 5.049 km W of Illapel, Chile · 19344 days ago · 46 km deep · 4 km away
- 6.724 km WSW of La Ligua, Chile · 19345 days ago · 33 km deep · 92 km away
- 4.643 km W of La Ligua, Chile · 19352 days ago · 42 km deep · 89 km away
- 5.01 km NW of Illapel, Chile · 19358 days ago · 39 km deep · 51 km away
- 4.7Near the coast of Valparaiso, Chile · 19371 days ago · 41 km deep · 86 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00003qq. Read Tue, Sep 22, 2026, 3:15 PM UTC.