Help Ukraine

Minor mag. 3.9 earthquake - 237 km southeast of Calama, Provincia de El Loa, Antofagasta, Chile, on Thursday, Oct 21, 2021 at 7:57 am (GMT -3) -

Minor mag. 3.9 earthquake - 237 km southeast of Calama, Provincia de El Loa, Antofagasta, Chile, on Thursday, Oct 21, 2021 at 7:57 am (GMT -3) Minor mag. 3.9 earthquake - 237 km southeast of Calama, Provincia de El Loa, Antofagasta, Chile, on Thursday, Oct 21, 2021 at 7:57 am (GMT -3)

Minor magnitude 3.9 earthquake at 221 km depth

21 Oct 11:02 UTC: First to report: EMSC after 5 minutes.
21 Oct 11:07: Magnitude recalculated from 3.9 to 3.7. Hypocenter depth recalculated from 228.0 to 205.0 km (from 142 to 127 mi). Epicenter location corrected by 35 km (22 mi) towards ENE.
21 Oct 11:17: Magnitude recalculated from 3.7 to 3.9. Hypocenter depth recalculated from 205.0 to 221.0 km (from 127 to 137 mi). Epicenter location corrected by 36 km (22 mi) towards W.
Date & time: Oct 21, 2021 10:57:27 UTC -
Local time at epicenter: Thursday, Oct 21, 2021 at 7:57 am (GMT -3)
Magnitude: 3.9
Depth: 221.0 km
Epicenter latitude / longitude: 24.13°S / 67.48°W (Provincia de El Loa, Antofagasta, Chile)
Antipode: 24.13°N / 112.52°E
Nearest volcano: Aracar (32 km / 20 mi)
Nearby towns and cities:
118 km (73 mi) W of San Antonio de los Cobres (Salta, Argentina) (pop: 4,000) --> See nearby quakes!
154 km (96 mi) SSE of San Pedro de Atacama (pop: 2,000) --> See nearby quakes!
157 km (97 mi) WNW of Santa Rosa de Tastil (Salta, Argentina) (pop: 2,000) --> See nearby quakes!
206 km (128 mi) WNW of Campo Quijano (Salta, Argentina) (pop: 5,000) --> See nearby quakes!
210 km (130 mi) WSW of Aguilar (Jujuy, Argentina) (pop: 3,660) --> See nearby quakes!
225 km (140 mi) WNW of Chicoana (Salta, Argentina) (pop: 8,470) --> See nearby quakes!
237 km (148 mi) SE of Calama (pop: 143,100) --> See nearby quakes!
240 km (149 mi) SW of Abra Pampa (Cochinoca, Jujuy, Argentina) (pop: 9,430) --> See nearby quakes!
301 km (187 mi) E of Antofagasta (pop: 309,800) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky -1.9°C (29 F), humidity: 11%, wind: 3 m/s (5 kts) from NNW
Primary data source: EMSC (European-Mediterranean Seismological Centre)
Estimated released energy: 4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 tons of TNT) | about seismic energy
Show interactive Map
[smaller] [bigger]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
If you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable to earthquake science, seismic hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag.DepthLocationSource
3.9221 kmSALTA, ARGENTINAEMSC
3.7192 kmSALTA (Argentina)INPRES

User reports for this quake

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.
Volcanoes & Earthquakes - new app for Android

Earlier earthquakes in the same area

Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version
Why is there advertising on this site?
Support us - Help us upgrade our services!
We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.