M4.8 earthquake 41 km S of Calama, Chile
A magnitude 4.8 earthquake struck 41 km S of Calama, Chile on Wed, Jul 20, 1983, 1:40 AM GMT-4 (05:40 UTC), 126 km (79 mi) below the surface.
A larger quake followed: M5.5 56 km ENE of Calama, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.8 (mb), light
- Local time
- UTC
- 1983-07-20 05:40:52 UTC
- Depth
- 126.4 km (78.5 mi), intermediate-depth
- Epicenter
- 22.826° S, 68.849° 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.
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.8 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 5.556 km ENE of Calama, Chile · 15769 days ago · 126 km deep · 81 km away
- 4.431 km NNE of Calama, Chile · 15757 days ago · 162 km deep · 70 km away
- 4.8Antofagasta, Chile · 15733 days ago · 127 km deep · 57 km away
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp0001wyg. Read Tue, Sep 22, 2026, 8:03 AM UTC.