M4.2 earthquake 140 km W of Copiapó, Chile
A magnitude 4.2 earthquake struck 140 km W of Copiapó, Chile on Thu, Jul 29, 2021, 8:18 PM GMT-4 (00:18 UTC), 10 km (6 mi) below the surface.
A larger quake followed: M5.6 86 km WSW of Copiapó, 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 (Mwr, regional moment), light
- Magnitude from
- USGS National Earthquake Information Center
- Local time
- UTC
- 2021-07-30 00:18:37 UTC
- Depth
- 10.0 km (6.2 mi), shallow
- Epicenter
- 27.128° S, 71.723° 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.
How well it is located
Reviewed by a seismologist.
- Location uncertainty
- About 5.6 km horizontally, 1.8 km in depth
- Depth from
- Operator assigned
- Station coverage gap
- 144°
- Stations used
- 59
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 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 us6000f0fx. Read Sat, Oct 3, 2026, 7:03 PM UTC.