M4.2 earthquake 137 km N of Calama, Chile
A magnitude 4.2 earthquake struck 137 km N of Calama, Chile on Thu, Aug 23, 2018, 11:22 PM GMT-3 (02:22 UTC), 112 km (69 mi) below the surface.
A larger quake followed: M4.6 117 km NE 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
- 4.2 (Mwr, regional moment), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-08-24 02:22:20 UTC
- Depth
- 111.7 km (69.4 mi), intermediate-depth
- Epicenter
- 21.227° S, 68.757° 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.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Normal
- Moment magnitude
- 4.2 Mwr
- Nodal plane 1
- Strike 327°, dip 57°, rake -93°
- Nodal plane 2
- Strike 153°, dip 33°, rake -85°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 6.1 km horizontally, 4.3 km in depth
- Magnitude uncertainty
- ±0.10
- Depth from
- From location
- Station coverage gap
- 62°
- Stations used
- 33
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 18 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.5152 km N of Calama, Chile · 2957 days ago · 125 km deep · 16 km away
- 4.3134 km ESE of Iquique, Chile · 2955 days ago · 102 km deep · 61 km away
- 4.368 km N of Calama, Chile · 2954 days ago · 117 km deep · 69 km away
- 4.482 km NNE of Calama, Chile · 2951 days ago · 129 km deep · 73 km away
- 4.3113 km ESE of Iquique, Chile · 2950 days ago · 114 km deep · 75 km away
- 4.384 km NNE of Calama, Chile · 2948 days ago · 125 km deep · 63 km away · felt by 1
- 4.275 km N of Calama, Chile · 2936 days ago · 108 km deep · 62 km away
- 4.3157 km NNE of Calama, Chile · 2934 days ago · 136 km deep · 26 km away
- 4.5147 km N of Calama, Chile · 2930 days ago · 124 km deep · 17 km away · felt by 2
- 4.4169 km NNE of Calama, Chile · 2927 days ago · 115 km deep · 42 km away
- 4.5119 km NNE of Calama, Chile · 2927 days ago · 115 km deep · 48 km away
- 4.3129 km ESE of Iquique, Chile · 2926 days ago · 123 km deep · 58 km away
- 4.6117 km NE of Calama, Chile · 2926 days ago · 115 km deep · 66 km away
- 4.2149 km N of Calama, Chile · 2919 days ago · 117 km deep · 22 km away
- 4.4153 km N of Calama, Chile · 2910 days ago · 133 km deep · 18 km away
- 4.3162 km N of Calama, Chile · 2907 days ago · 113 km deep · 27 km away
- 4.2139 km N of Calama, Chile · 2904 days ago · 122 km deep · 24 km away
- 4.2121 km ESE of Iquique, Chile · 2900 days ago · 96 km deep · 78 km away
Before
- 4.4129 km N of Calama, Chile · 2961 days ago · 127 km deep · 13 km away
- 4.486 km NE of Calama, Chile · 2974 days ago · 111 km deep · 77 km away
- 4.5115 km E of Iquique, Chile · 2982 days ago · 123 km deep · 98 km away · felt by 1
- 4.3145 km NNE of Calama, Chile · 2984 days ago · 135 km deep · 15 km away
- 4.496 km NE of Calama, Chile · 2986 days ago · 112 km deep · 81 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000ggf1. Read Thu, Oct 1, 2026, 6:47 AM UTC.