M3.9 earthquake 88 km W of Iquique, Chile
A magnitude 3.9 earthquake struck 88 km W of Iquique, Chile on Wed, Jul 19, 2017, 6:46 PM GMT-4 (22:46 UTC), 9 km (6 mi) below the surface.
A larger quake followed: M5.2 93 km WNW of Iquique, 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
- 2017-07-19 22:46:23 UTC
- Depth
- 8.9 km (5.5 mi), shallow
- Epicenter
- 20.110° S, 70.987° 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 326°, dip 27°, rake 81°
- Nodal plane 2
- Strike 156°, dip 64°, rake 94°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 5.7 km horizontally, 6.4 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 203°, poorly surrounded by stations
- Stations used
- 19
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 9 in the 60 days after this one and 0 in the 30 days before it.
After
- 4.158 km N of Iquique, Chile · 3360 days ago · 52 km deep · 91 km away · felt by 1
- 4.38 km NNE of Iquique, Chile · 3353 days ago · 42 km deep · 89 km away
- 5.293 km WNW of Iquique, Chile · 3336 days ago · 10 km deep · 10 km away · felt by 1
- 4.792 km W of Iquique, Chile · 3336 days ago · 15 km deep · 5 km away
- 4.2101 km WNW of Iquique, Chile · 3334 days ago · 32 km deep · 16 km away
- 4.288 km WNW of Iquique, Chile · 3328 days ago · 37 km deep · 8 km away
- 4.322 km N of Iquique, Chile · 3327 days ago · 47 km deep · 90 km away
- 4.076 km W of Iquique, Chile · 3305 days ago · 15 km deep · 19 km away · felt by 1
- 4.284 km W of Iquique, Chile · 3305 days ago · 12 km deep · 17 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000a0t0. Read Wed, Sep 30, 2026, 11:49 PM UTC.