M4.7 earthquake 99 km NNE of Calama, Chile
A magnitude 4.7 earthquake struck 99 km NNE of Calama, Chile on Thu, Sep 20, 1973, 9:22 AM GMT-4 (13:22 UTC), 120 km (75 mi) below the surface.
A larger quake followed: M5.1 133 km WSW of Colchani, Bolivia. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.7 (mb), light
- Local time
- UTC
- 1973-09-20 13:22:26 UTC
- Depth
- 120.0 km (74.6 mi), intermediate-depth
- Epicenter
- 21.578° S, 68.701° 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 1.7 and up: 5 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.2161 km NNE of Calama, Chile · 19354 days ago · 110 km deep · 69 km away
- 5.1133 km WSW of Colchani, Bolivia · 19354 days ago · 107 km deep · 100 km away
- 4.0148 km SE of Iquique, Chile · 19354 days ago · 141 km deep · 67 km away
- 3.8104 km NE of Calama, Chile · 19324 days ago · 130 km deep · 58 km away
- 4.1126 km NNE of Calama, Chile · 19312 days ago · 123 km deep · 27 km away
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00003g0. Read Mon, Sep 28, 2026, 8:07 PM UTC.