M4.7 earthquake 84 km S of Arica, Chile
A magnitude 4.7 earthquake struck 84 km S of Arica, Chile on Sun, Dec 10, 2017, 9:21 PM GMT-3 (00:21 UTC), 62 km (38 mi) below the surface.
A larger quake followed: M6.3 100 km ESE of Arica, 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
- 2017-12-11 00:21:59 UTC
- Depth
- 61.6 km (38.3 mi), shallow
- Epicenter
- 19.238° S, 70.252° 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 II, weak shaking.
Fault motion and ground failure
How the rock slipped, from the moment tensor, and the USGS estimate of landslides and liquefaction.
- Faulting
- Reverse (thrust)
- Moment magnitude
- 4.7 Mwr
- Nodal plane 1
- Strike 166°, dip 80°, rake 69°
- Nodal plane 2
- Strike 51°, dip 23°, rake 153°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 4.9 km horizontally, 6.0 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 143°
- Stations used
- 66
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 0 in the 30 days before it.
After
- 5.5110 km WNW of Iquique, Chile · 3215 days ago · 12 km deep · 99 km away · felt by 10
- 4.444 km N of Iquique, Chile · 3213 days ago · 10 km deep · 65 km away · felt by 1
- 4.059 km E of Arica, Chile · 3208 days ago · 142 km deep · 95 km away
- 5.2122 km NE of Iquique, Chile · 3197 days ago · 103 km deep · 87 km away · felt by 5
- 6.3100 km ESE of Arica, Chile · 3175 days ago · 116 km deep · 94 km away · felt by 64
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000c2qm. Read Thu, Oct 1, 2026, 6:27 AM UTC.