M3.6 earthquake 122 km NW of Vallenar, Chile
A magnitude 3.6 earthquake struck 122 km NW of Vallenar, Chile on Sat, Sep 23, 2017, 8:25 PM GMT-3 (23:25 UTC), 7 km (4 mi) below the surface.
A larger quake followed: M4.6 94 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
- 3.6 (mwr), minor
- Local time
- UTC
- 2017-09-23 23:25:56 UTC
- Depth
- 7.2 km (4.5 mi), shallow
- Epicenter
- 27.810° S, 71.656° 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
- 3.6 Mwr
- Nodal plane 1
- Strike 23°, dip 38°, rake 116°
- Nodal plane 2
- Strike 171°, dip 57°, rake 71°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 4.2 km horizontally, 5.8 km in depth
- Magnitude uncertainty
- ±0.06
- Depth from
- From location
- Station coverage gap
- 143°
- Stations used
- 42
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 6 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.694 km NW of Vallenar, Chile · 3289 days ago · 32 km deep · 34 km away · felt by 3
- 4.458 km WNW of Vallenar, Chile · 3288 days ago · 34 km deep · 66 km away
- 4.261 km WNW of Vallenar, Chile · 3287 days ago · 21 km deep · 68 km away
- 4.364 km W of Vallenar, Chile · 3269 days ago · 40 km deep · 99 km away
- 4.281 km WNW of Vallenar, Chile · 3243 days ago · 39 km deep · 52 km away
- 4.1130 km ENE of Copiapó, Chile · 3237 days ago · 8 km deep · 17 km away
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000atqw. Read Sat, Sep 26, 2026, 11:44 AM UTC.