M4.0 earthquake 55 km NNE of Calama, Chile
A magnitude 4.0 earthquake struck 55 km NNE of Calama, Chile on Sun, Dec 20, 2020, 7:20 PM GMT-3 (22:20 UTC), 121 km (75 mi) below the surface.
A larger quake followed: M4.9 Antofagasta, 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, body-wave), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2020-12-20 22:20:03 UTC
- Depth
- 121.3 km (75.3 mi), intermediate-depth
- Epicenter
- 22.005° S, 68.683° 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.
- Location uncertainty
- About 4.4 km horizontally, 5.6 km in depth
- Magnitude uncertainty
- ±0.18
- Depth from
- From location
- Station coverage gap
- 46°
- Stations used
- 28
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 8 in the 30 days before it.
After
- 4.9Antofagasta, Chile · 2112 days ago · 106 km deep · 78 km away · felt by 2
- 4.249 km NNE of Calama, Chile · 2111 days ago · 118 km deep · 12 km away
- 4.229 km E of Calama, Chile · 2107 days ago · 111 km deep · 48 km away
- 4.2134 km NNE of Calama, Chile · 2106 days ago · 135 km deep · 81 km away · felt by 2
- 4.0134 km N of Calama, Chile · 2103 days ago · 132 km deep · 85 km away
- 4.036 km SSE of Calama, Chile · 2100 days ago · 113 km deep · 84 km away
- 4.845 km E of Calama, Chile · 2091 days ago · 105 km deep · 58 km away
- 4.982 km NNE of Calama, Chile · 2089 days ago · 117 km deep · 30 km away · felt by 1
- 4.1149 km N of Calama, Chile · 2070 days ago · 127 km deep · 98 km away
Before
- 6.075 km NNE of Calama, Chile · 2118 days ago · 114 km deep · 22 km away · felt by 38
- 4.6145 km N of Calama, Chile · 2123 days ago · 119 km deep · 99 km away · felt by 1
- 4.2115 km N of Calama, Chile · 2127 days ago · 118 km deep · 66 km away
- 4.6132 km N of Calama, Chile · 2130 days ago · 116 km deep · 85 km away
- 4.2107 km NNE of Calama, Chile · 2132 days ago · 115 km deep · 53 km away
- 4.2104 km NNE of Calama, Chile · 2133 days ago · 138 km deep · 50 km away
- 4.165 km NE of Calama, Chile · 2134 days ago · 138 km deep · 17 km away
- 4.224 km E of Calama, Chile · 2139 days ago · 114 km deep · 51 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us7000csse. Read Fri, Oct 2, 2026, 6:09 PM UTC.