M4.3 earthquake 50 km WNW of Vallenar, Chile
A magnitude 4.3 earthquake struck 50 km WNW of Vallenar, Chile on Wed, Aug 2, 2017, 5:30 PM GMT-4 (21:30 UTC), 41 km (26 mi) below the surface.
A larger quake followed: M4.6 94 km NW of Vallenar, Chile. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 4.3 (mwr), light
- Local time
- UTC
- 2017-08-02 21:30:26 UTC
- Depth
- 41.2 km (25.6 mi), shallow
- Epicenter
- 28.466° S, 71.261° W
- Region
- Chile
- Felt reports
- 3
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
3 people 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
- Oblique normal
- Moment magnitude
- 4.3 Mwr
- Nodal plane 1
- Strike 209°, dip 88°, rake -123°
- Nodal plane 2
- Strike 117°, dip 33°, rake -3°
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 5.6 km horizontally, 4.9 km in depth
- Magnitude uncertainty
- ±0.04
- Depth from
- From location
- Station coverage gap
- 138°
- Stations used
- 73
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 1 in the 30 days before it.
After
- 4.1Near the coast of Atacama, Chile · 3321 days ago · 33 km deep · 7 km away
- 3.888 km NNW of La Serena, Chile · 3310 days ago · 48 km deep · 85 km away
- 3.6122 km NW of Vallenar, Chile · 3290 days ago · 7 km deep · 83 km away
- 4.694 km NW of Vallenar, Chile · 3290 days ago · 32 km deep · 66 km away · felt by 3
- 4.458 km WNW of Vallenar, Chile · 3289 days ago · 34 km deep · 19 km away
- 4.261 km WNW of Vallenar, Chile · 3288 days ago · 21 km deep · 14 km away
- 4.224 km NNW of Vallenar, Chile · 3283 days ago · 61 km deep · 42 km away
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us10009j2p. Read Sun, Sep 27, 2026, 6:07 AM UTC.