M4.0 earthquake 160 km WNW of Coquimbo, Chile
A magnitude 4.0 earthquake struck 160 km WNW of Coquimbo, Chile on Tue, Feb 20, 2018, 12:59 AM GMT-3 (03:59 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.4 176 km WNW of Coquimbo, 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
- 2018-02-20 03:59:32 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 29.220° S, 72.767° 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
- 4.0 Mwr
- Nodal plane 1
- Strike 13°, dip 46°, rake -95°
- Nodal plane 2
- Strike 200°, dip 44°, rake -85°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 6.0 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- Operator assigned
- Station coverage gap
- 152°
- Stations used
- 65
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 2 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.4176 km WNW of Coquimbo, Chile · 3135 days ago · 10 km deep · 17 km away
- 4.3176 km WNW of Coquimbo, Chile · 3135 days ago · 10 km deep · 17 km away
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000d54m. Read Sat, Sep 26, 2026, 5:35 AM UTC.