M4.1 earthquake 92 km NW of Vallenar, Chile
A magnitude 4.1 earthquake struck 92 km NW of Vallenar, Chile on Thu, Sep 22, 2016, 9:25 PM GMT-3 (00:25 UTC), 23 km (14 mi) below the surface.
A larger quake followed: M4.5 50 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
- 4.1 (mwr), light
- Local time
- UTC
- 2016-09-23 00:25:19 UTC
- Depth
- 22.9 km (14.3 mi), shallow
- Epicenter
- 27.902° S, 71.313° 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
- Oblique reverse
- Moment magnitude
- 4.1 Mwr
- Nodal plane 1
- Strike 174°, dip 76°, rake 56°
- Nodal plane 2
- Strike 64°, dip 37°, rake 156°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 3.3 km horizontally, 5.9 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 144°
- Stations used
- 64
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 5 in the 60 days after this one and 1 in the 30 days before it.
After
- 4.550 km NW of Vallenar, Chile · 3646 days ago · 52 km deep · 47 km away · felt by 1
- 4.426 km NNE of Vallenar, Chile · 3634 days ago · 99 km deep · 78 km away
- 4.263 km NNW of Vallenar, Chile · 3608 days ago · 58 km deep · 32 km away
- 4.283 km NNW of Vallenar, Chile · 3600 days ago · 24 km deep · 16 km away
- 4.334 km NE of Vallenar, Chile · 3597 days ago · 82 km deep · 99 km away
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us10006rtg. Read Wed, Sep 23, 2026, 9:18 PM UTC.