M4.3 earthquake 126 km WNW of Copiapó, Chile
A magnitude 4.3 earthquake struck 126 km WNW of Copiapó, Chile on Thu, Oct 6, 1983, 10:39 PM GMT-4 (02:39 UTC), 33 km (21 mi) below the surface.
A larger quake followed: M5.3 100 km WNW of Diego de Almagro, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mb), light
- Local time
- UTC
- 1983-10-07 02:39:38 UTC
- Depth
- 33.0 km (20.5 mi), shallow
- Epicenter
- 26.837° S, 71.462° 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: 3 in the 60 days after this one and 5 in the 30 days before it.
After
- 5.3100 km WNW of Diego de Almagro, Chile · 15685 days ago · 9 km deep · 84 km away
- 5.096 km NW of Copiapó, Chile · 15684 days ago · 33 km deep · 33 km away
- 4.571 km W of Diego de Almagro, Chile · 15684 days ago · 33 km deep · 81 km away
Before
- 5.591 km NW of Copiapó, Chile · 15692 days ago · 20 km deep · 56 km away
- 5.0121 km W of Diego de Almagro, Chile · 15692 days ago · 33 km deep · 60 km away
- 5.760 km W of Diego de Almagro, Chile · 15694 days ago · 31 km deep · 98 km away
- 7.454 km WSW of Diego de Almagro, Chile · 15694 days ago · 15 km deep · 95 km away
- 5.273 km WSW of Diego de Almagro, Chile · 15699 days ago · 30 km deep · 77 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001yuk. Read Tue, Sep 22, 2026, 5:24 PM UTC.