M4.2 earthquake 93 km NW of Vallenar, Chile
A magnitude 4.2 earthquake struck 93 km NW of Vallenar, Chile on Sat, Sep 29, 2018, 1:34 PM GMT-3 (16:34 UTC), 28 km (17 mi) below the surface.
A larger quake followed: M4.6 92 km NNW 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
- 4.2 (mb), light
- Local time
- UTC
- 2018-09-29 16:34:56 UTC
- Depth
- 27.8 km (17.3 mi), shallow
- Epicenter
- 27.977° S, 71.429° 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.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 5.5 km horizontally, 8.3 km in depth
- Magnitude uncertainty
- ±0.37
- Depth from
- From location
- Station coverage gap
- 191°, poorly surrounded by stations
- Stations used
- 27
Nearest places
Distance and direction from each place to the epicenter, with its forecast.
Nearby
Within 100 km, magnitude 1.5 and up: 4 in the 60 days after this one and 2 in the 30 days before it.
After
- 4.187 km NNW of Vallenar, Chile · 2915 days ago · 19 km deep · 18 km away
- 4.489 km W of Copiapó, Chile · 2894 days ago · 40 km deep · 70 km away
- 4.589 km WNW of Copiapó, Chile · 2889 days ago · 21 km deep · 90 km away · felt by 1
- 4.692 km NNW of Vallenar, Chile · 2883 days ago · 22 km deep · 26 km away
Before
Earthquakes todayChile earthquakesLive radar here
Sources
From the USGS Earthquake Hazards Program and its partner networks, event us1000h4by. Read Wed, Sep 30, 2026, 6:44 AM UTC.