M4.0 earthquake 145 km NE of Taltal, Chile
A magnitude 4.0 earthquake struck 145 km NE of Taltal, Chile on Thu, Sep 21, 2017, 4:58 PM GMT-3 (19:58 UTC), 89 km (55 mi) below the surface.
A larger quake followed: M4.3 120 km ESE of Antofagasta, 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, regional moment), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2017-09-21 19:58:58 UTC
- Depth
- 89.2 km (55.4 mi), intermediate-depth
- Epicenter
- 24.593° S, 69.359° 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
- Normal
- Moment magnitude
- 4.0 Mwr
- Nodal plane 1
- Strike 334°, dip 69°, rake -75°
- Nodal plane 2
- Strike 119°, dip 26°, rake -123°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 5.9 km horizontally, 8.0 km in depth
- Magnitude uncertainty
- ±0.06
- Stations used
- 0
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 1 in the 60 days after this one and 0 in the 30 days before it.
After
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us2000asqw. Read Thu, Oct 1, 2026, 5:45 PM UTC.