M4.2 earthquake 113 km W of Illapel, Chile
A magnitude 4.2 earthquake struck 113 km W of Illapel, Chile on Tue, Sep 19, 2017, 11:27 AM GMT-3 (14:27 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
- 4.2 (mwr), light
- Local time
- UTC
- 2017-09-19 14:27:59 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 31.822° S, 72.345° W
- Region
- Chile
- Felt reports
- 1
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
1 person reported to the USGS what they felt; the strongest reported shaking was I, not felt shaking.
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
- 4.2 Mwr
- Nodal plane 1
- Strike 8°, dip 53°, rake 101°
- Nodal plane 2
- Strike 169°, dip 38°, rake 75°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 3.4 km horizontally, 1.9 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- Operator assigned
- Station coverage gap
- 141°
- Stations used
- 47
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 7 in the 60 days after this one and 6 in the 30 days before it.
After
- 4.5124 km W of Illapel, Chile · 3294 days ago · 10 km deep · 13 km away · felt by 5
- 4.0Off the coast of Coquimbo, Chile · 3294 days ago · 10 km deep · 13 km away
- 4.3103 km W of Illapel, Chile · 3287 days ago · 14 km deep · 11 km away · felt by 21
- 4.199 km W of Illapel, Chile · 3284 days ago · 39 km deep · 18 km away · felt by 6
- 4.161 km W of La Ligua, Chile · 3277 days ago · 20 km deep · 86 km away · felt by 103
- 4.178 km SW of Ovalle, Chile · 3271 days ago · 21 km deep · 97 km away · felt by 3
- 4.7143 km NW of Valparaíso, Chile · 3269 days ago · 10 km deep · 66 km away · felt by 127
Before
- 3.9118 km W of Illapel, Chile · 3295 days ago · 10 km deep · 10 km away
- 4.396 km W of Illapel, Chile · 3296 days ago · 10 km deep · 17 km away
- 4.3102 km WSW of Illapel, Chile · 3296 days ago · 10 km deep · 12 km away
- 5.993 km WSW of Illapel, Chile · 3296 days ago · 17 km deep · 21 km away · felt by 115
- 4.449 km WSW of Illapel, Chile · 3317 days ago · 22 km deep · 64 km away
- 4.099 km WSW of Illapel, Chile · 3318 days ago · 10 km deep · 14 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000aqqm. Read Sun, Sep 27, 2026, 3:11 AM UTC.