M4.0 earthquake 124 km NNE of Calama, Chile
A magnitude 4.0 earthquake struck 124 km NNE of Calama, Chile on Sun, Apr 22, 1973, 7:12 AM GMT-4 (11:12 UTC), 124 km (77 mi) below the surface.
A larger quake followed: M5.3 151 km ESE of Iquique, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.0 (mb), light
- Local time
- UTC
- 1973-04-22 11:12:12 UTC
- Depth
- 124.0 km (77.1 mi), intermediate-depth
- Epicenter
- 21.438° S, 68.405° 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
- 7
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.841 km ENE of Calama, Chile · 19482 days ago · 111 km deep · 94 km away
- 5.3151 km ESE of Iquique, Chile · 19461 days ago · 118 km deep · 86 km away
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event usp00001gm. Read Wed, Sep 30, 2026, 1:18 AM UTC.