M4.0 earthquake 103 km WNW of Copiapó, Chile
A magnitude 4.0 earthquake struck 103 km WNW of Copiapó, Chile on Tue, Jan 16, 2018, 7:11 PM GMT-3 (22:11 UTC), 14 km (9 mi) below the surface.
A larger quake followed: M4.6 124 km NW of Vallenar, 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 (mwr), light
- Local time
- UTC
- 2018-01-16 22:11:30 UTC
- Depth
- 13.8 km (8.6 mi), shallow
- Epicenter
- 27.084° S, 71.324° 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
- Reverse (thrust)
- Moment magnitude
- 4.0 Mwr
- Nodal plane 1
- Strike 15°, dip 24°, rake 103°
- Nodal plane 2
- Strike 181°, dip 67°, rake 84°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 3.4 km horizontally, 4.3 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- From location
- Station coverage gap
- 143°
- Stations used
- 51
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 3 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.390 km NW of Vallenar, Chile · 3159 days ago · 20 km deep · 97 km away
- 4.4117 km WNW of Copiapó, Chile · 3156 days ago · 10 km deep · 16 km away · felt by 1
- 4.6124 km NW of Vallenar, Chile · 3144 days ago · 8 km deep · 89 km away
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000ck63. Read Sat, Sep 26, 2026, 2:23 AM UTC.