M4.7 earthquake 44 km ESE of Calama, Chile
A magnitude 4.7 earthquake struck 44 km ESE of Calama, Chile on Thu, Oct 18, 2018, 8:42 PM GMT-3 (23:42 UTC), 106 km (66 mi) below the surface.
A larger quake followed: M4.9 90 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
- 4.7 (Mwr, regional moment), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2018-10-18 23:42:07 UTC
- Depth
- 106.5 km (66.2 mi), intermediate-depth
- Epicenter
- 22.640° S, 68.541° W
- Region
- Chile
- Felt reports
- 3
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
3 people reported to the USGS what they felt; the strongest reported shaking was IV, light shaking.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Oblique normal
- Moment magnitude
- 4.7 Mwr
- Nodal plane 1
- Strike 207°, dip 21°, rake -43°
- Nodal plane 2
- Strike 338°, dip 76°, rake -106°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 6.2 km horizontally, 4.8 km in depth
- Magnitude uncertainty
- ±0.07
- Depth from
- From location
- Station coverage gap
- 54°
- Stations used
- 107
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.7 and up: 12 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.219 km SE of San Pedro de Atacama, Chile · 2899 days ago · 131 km deep · 66 km away
- 4.521 km E of Calama, Chile · 2896 days ago · 110 km deep · 25 km away
- 4.360 km NNE of Calama, Chile · 2895 days ago · 105 km deep · 78 km away · felt by 1
- 4.828 km ENE of Calama, Chile · 2891 days ago · 98 km deep · 40 km away · felt by 1
- 4.577 km NNE of Calama, Chile · 2886 days ago · 126 km deep · 91 km away
- 4.553 km ENE of San Pedro de Atacama, Chile · 2883 days ago · 170 km deep · 85 km away
- 4.332 km SSW of Calama, Chile · 2875 days ago · 122 km deep · 54 km away
- 4.533 km NE of Calama, Chile · 2869 days ago · 122 km deep · 49 km away
- 4.443 km ESE of Calama, Chile · 2867 days ago · 135 km deep · 12 km away
- 4.990 km NE of Calama, Chile · 2853 days ago · 133 km deep · 95 km away
- 3.940 km NE of Calama, Chile · 2852 days ago · 114 km deep · 52 km away
- 4.190 km SSW of Calama, Chile · 2849 days ago · 94 km deep · 96 km away
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000he6x. Read Thu, Oct 1, 2026, 11:45 AM UTC.