M3.9 earthquake 118 km W of Illapel, Chile
A magnitude 3.9 earthquake struck 118 km W of Illapel, Chile on Tue, Sep 19, 2017, 7:54 AM GMT-3 (10:54 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M4.7 143 km NW of Valparaíso, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 3.9 (mwr), minor
- Local time
- UTC
- 2017-09-19 10:54:10 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 31.746° S, 72.409° 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
- 3.9 Mwr
- Nodal plane 1
- Strike 180°, dip 25°, rake 86°
- Nodal plane 2
- Strike 4°, dip 65°, rake 92°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 3.5 km horizontally, 2.0 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- Operator assigned
- Station coverage gap
- 189°, poorly surrounded by stations
- Stations used
- 39
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 8 in the 60 days after this one and 5 in the 30 days before it.
After
- 4.2113 km W of Illapel, Chile · 3294 days ago · 10 km deep · 10 km away · felt by 1
- 4.5124 km W of Illapel, Chile · 3294 days ago · 10 km deep · 7 km away · felt by 5
- 4.0Off the coast of Coquimbo, Chile · 3294 days ago · 10 km deep · 18 km away
- 4.3103 km W of Illapel, Chile · 3287 days ago · 14 km deep · 16 km away · felt by 21
- 4.199 km W of Illapel, Chile · 3284 days ago · 39 km deep · 19 km away · felt by 6
- 4.161 km W of La Ligua, Chile · 3277 days ago · 20 km deep · 97 km away · felt by 103
- 4.178 km SW of Ovalle, Chile · 3271 days ago · 21 km deep · 94 km away · felt by 3
- 4.7143 km NW of Valparaíso, Chile · 3269 days ago · 10 km deep · 68 km away · felt by 127
Before
- 4.396 km W of Illapel, Chile · 3295 days ago · 10 km deep · 24 km away
- 4.3102 km WSW of Illapel, Chile · 3295 days ago · 10 km deep · 21 km away
- 5.993 km WSW of Illapel, Chile · 3295 days ago · 17 km deep · 28 km away · felt by 115
- 4.449 km WSW of Illapel, Chile · 3317 days ago · 22 km deep · 69 km away
- 4.099 km WSW of Illapel, Chile · 3318 days ago · 10 km deep · 22 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000aqlv. Read Sun, Sep 27, 2026, 12:27 AM UTC.