M4.0 earthquake 76 km W of Iquique, Chile
A magnitude 4.0 earthquake struck 76 km W of Iquique, Chile on Tue, Sep 12, 2017, 7:28 PM GMT-3 (22:28 UTC), 15 km (10 mi) below the surface.
A larger quake followed: M4.4 90 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
- 4.0 (mwr), light
- Local time
- UTC
- 2017-09-12 22:28:44 UTC
- Depth
- 15.5 km (9.6 mi), shallow
- Epicenter
- 20.250° S, 70.884° 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
- 4.0 Mwr
- Nodal plane 1
- Strike 346°, dip 33°, rake 88°
- Nodal plane 2
- Strike 168°, dip 57°, rake 91°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 4.8 km horizontally, 4.6 km in depth
- Magnitude uncertainty
- ±0.05
- Depth from
- From location
- Station coverage gap
- 146°
- 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: 2 in the 60 days after this one and 3 in the 30 days before it.
After
- 4.284 km W of Iquique, Chile · 3305 days ago · 12 km deep · 8 km away
- 4.490 km WNW of Iquique, Chile · 3297 days ago · 13 km deep · 30 km away
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000al5m. Read Thu, Oct 1, 2026, 1:29 AM UTC.