Minor mag. 3.5 earthquake - 81 km northeast of Calama, Provincia de El Loa, Antofagasta, Chile, on Thursday, 22 July 2021 at 03:29 (GMT) -

Minor mag. 3.5 earthquake - 81 km northeast of Calama, Provincia de El Loa, Antofagasta, Chile, on Thursday, 22 July 2021 at 03:29 (GMT)

Minor magnitude 3.5 earthquake at 127 km depth

22 Jul 03:40 UTC: First to report: EMSC after 10 minutes.
22 Jul 03:49: Magnitude recalculated from 3.5 to 4.4. Hypocenter depth recalculated from 126.0 to 139.0 km (from 78 to 86 mi). Epicenter location corrected by 5.4 km (3.4 mi) towards SW.
22 Jul 05:30: Now using data updates from GUG (U. Chile)
Update Thu, 22 Jul 2021, 03:54
Moderate magnitude 4.4 quake hits 76 km northeast of Calama, Chile late at night
4.4 quake 21 Jul 11:29 pm (GMT -4)
4.4 quake 21 Jul 11:29 pm (GMT -4)
The European-Mediterranean Seismological Centre (EMSC) reported a magnitude 4.4 quake in Chile near Calama, Provincia de El Loa, Antofagasta, only 24 minutes ago. The earthquake hit late at night on Wednesday 21 July 2021 at 11:29 pm local time at an intermediate depth of 139 km. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
A second report was later issued by the United States Geological Survey, which listed it as a magnitude 4.4 earthquake as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Calama (pop. 143,100) located 76 km from the epicenter.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.
Download the Volcanoes & Earthquakes app to get one of the fastest seismic alerts online:
Android | IOS

Earthquake data:

Date & time: 22 Jul 2021 03:29:43 UTC -
Magnitude: 3.5
Depth: 126.5 km
Epicenter latitude / longitude: 21.812°S / 68.557°W (Provincia de El Loa, Antofagasta, Chile)
Nearest volcano: San Pedro (20 km / 12 mi)
Nearby towns and cities:
81 km (50 mi) NNE of Calama (pop: 143,100) --> See nearby quakes!
128 km (79 mi) NNW of San Pedro de Atacama (pop: 2,000) --> See nearby quakes!
172 km (107 mi) E of Tocopilla (pop: 24,500) --> See nearby quakes!
243 km (151 mi) SE of Iquique (Tarapacá) (pop: 227,500) --> See nearby quakes!
278 km (173 mi) NE of Antofagasta (pop: 309,800) --> See nearby quakes!
383 km (238 mi) SW of Potosi (Potosí, Bolivia) (pop: 141,300) --> See nearby quakes!
397 km (247 mi) W of Tarija (Bolivia) (pop: 159,300) --> See nearby quakes!
413 km (257 mi) SSE of Arica (Arica y Parinacota) (pop: 186,000) --> See nearby quakes!
426 km (265 mi) NW of Jujuy (Argentina) (pop: 305,900) --> See nearby quakes!
462 km (287 mi) SW of Sucre (Chuquisaca, Bolivia) (pop: 224,800) --> See nearby quakes!
Primary data source: GUG (U. Chile)
Estimated released energy: 1.1 x 1010 joules (3.12 megawatt hours, equivalent to 2.68 tons of TNT) More info
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!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake 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
3.5127 kmChile: 72 Km Al SO De OllagüeGUG (U. Chile)
4.4141 km75 Km NNE of Calama, ChileUSGS
4.4138 kmANTOFAGASTA, CHILEEMSC

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 yet. If you felt it be the first to report it!
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:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Additional seismic data sources
  • Improved content in English
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.