Moderate mag. 5.1 earthquake - El Loa, 83 km northeast of Calama, Provincia de El Loa, Antofagasta, Chile, on Saturday, Aug 7, 2021 2:31 pm (GMT -4) -

Moderate mag. 5.1 earthquake - El Loa, 83 km northeast of Calama, Provincia de El Loa, Antofagasta, Chile, on Saturday, Aug 7, 2021 2:31 pm (GMT -4)

Moderate magnitude 5.1 earthquake at 146 km depth

7 Aug 18:34 UTC: First to report: GFZ after 4 minutes.
7 Aug 18:37: Magnitude recalculated from 4.8 to 4.9. Hypocenter depth recalculated from 179.0 to 138.0 km (from 111 to 86 mi). Epicenter location corrected by 20 km (12 mi) towards E.
7 Aug 18:50: Now using data updates from GUG (U. Chile)
7 Aug 19:34: Hypocenter depth recalculated from 142.4 to 145.8 km (from 88 to 91 mi). Epicenter location corrected by 4.8 km (3 mi) towards WNW.
Update Sat, 7 Aug 2021, 18:42
Moderate 4.9 quake hits near Calama, Provincia de El Loa, Antofagasta, Chile
4.9 quake 7 Aug 2:31 pm (GMT -4)
4.9 quake 7 Aug 2:31 pm (GMT -4)
An earthquake of magnitude 4.9 occurred early afternoon on Saturday 7 August 2021 at 2:31 pm local time near Calama, Provincia de El Loa, Antofagasta, Chile, as reported by the German Research Centre for Geosciences (GFZ).
According to preliminary data, the quake was located at an intermediate depth of 138 km. The strength of the earthquake may have been tempered by its relative great depth below the surface, which makes it feel weaker in absolute terms. 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.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 4.9 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 86 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 and get one of the fastest seismic alerts online:
Android | iOS

Earthquake data

Date & time: Aug 7, 2021 18:31:05 UTC -
Local time at epicenter: Saturday, Aug 7, 2021 2:31 pm (GMT -4)
Magnitude: 5.1
Depth: 145.8 km
Epicenter latitude / longitude: 21.854°S / 68.444°W (El Loa, Antofagasta, Chile)
Antipode: 21.854°N / 111.556°E
Nearest volcano: San Pedro (7 km / 4 mi)
Nearby towns and cities:
83 km (52 mi) NE of Calama (pop: 143,100) --> See nearby quakes!
120 km (75 mi) NNW of San Pedro de Atacama (pop: 2,000) --> See nearby quakes!
183 km (114 mi) E of Tocopilla (pop: 24,500) --> See nearby quakes!
254 km (158 mi) SE of Iquique (Tarapacá) (pop: 227,500) --> See nearby quakes!
283 km (176 mi) NE of Antofagasta (pop: 309,800) --> See nearby quakes!
285 km (177 mi) W of Tupiza (Sud Chichas, Potosí, Bolivia) (pop: 22,200) --> See nearby quakes!
295 km (183 mi) W of Villazon (Modesto Omiste, Potosí, Bolivia) (pop: 30,300) --> See nearby quakes!
377 km (234 mi) SW of Ciudad Potosi (Potosí, Bolivia) (pop: 141,300) --> See nearby quakes!
423 km (263 mi) SSE of Arica (Arica y Parinacota) (pop: 186,000) --> See nearby quakes!
456 km (284 mi) SW of Sucre (Chuquisaca, Bolivia) (pop: 224,800) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 5.7°C (42 F), humidity: 8%, wind: 7 m/s (13 kts) from SW
Primary data source: GUG (U. Chile)
Estimated released energy: 2.8 x 1012 joules (783 megawatt hours, equivalent to 674 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!
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
5.1146 kmChile: 73 Km Al S De OllagüeGUG (U. Chile)
5.1136 kmANTOFAGASTA, CHILEEMSC
5.3157 kmCHILE (Argentina)INPRES
5.1138 kmChile-Bolivia Border RegionGFZ
5.2135 km86 Km NE of Calama, ChileUSGS
5.2102 kmChile-Bolivia Border RegionGeoAu
5.2109 kmChile-Bolivia Border RegionUSP

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

Aftershocks

[More info]

Recorded aftershocks, latest first (15 quakes)

  • 04 Oct 2021 21:35 UTC
    | M 3.2 |
    133 km (82.6 mi) depth
    |
    19 km (12 mi) distance
    | EMSC | Details
  • 02 Oct 2021 04:36 UTC
    | M 4.5 |
    117 km (72.7 mi) depth
    |
    12 km (8 mi) distance
    | GFZ | Details
  • 30 Sep 2021 01:01 UTC
    | M 2.5 |
    131 km (81.4 mi) depth
    |
    19 km (12 mi) distance
    | EMSC | Details
  • 27 Sep 2021 18:54 UTC
    | M 3.1 |
    108 km (67.1 mi) depth
    |
    18 km (11 mi) distance
    | EMSC | Details
  • 26 Sep 2021 19:52 UTC
    | M 3.0 |
    121 km (75.2 mi) depth
    |
    13 km (8 mi) distance
    | EMSC | Details
  • 23 Sep 2021 21:34 UTC
    | M 3.1 |
    113 km (70.2 mi) depth
    |
    11 km (7 mi) distance
    | EMSC | Details
  • 23 Sep 2021 02:47 UTC
    | M 3.0 |
    138 km (85.7 mi) depth
    |
    21 km (13 mi) distance
    | EMSC | Details
  • 21 Sep 2021 14:27 UTC
    | M 2.9 |
    121 km (75.2 mi) depth
    |
    6 km (4 mi) distance
    | EMSC | Details
  • 21 Sep 2021 01:15 UTC
    | M 2.8 |
    126 km (78.3 mi) depth
    |
    15 km (9 mi) distance
    | EMSC | Details
  • 16 Sep 2021 13:49 UTC
    | M 3.3 |
    136 km (84.5 mi) depth
    |
    18 km (11 mi) distance
    | EMSC | Details
  • 08 Sep 2021 10:11 UTC
    | M 4.1 |
    141.1 km (87.7 mi) depth
    |
    21 km (13 mi) distance
    | USGS | Details
  • 14 Aug 2021 13:45 UTC
    | M 2.9 |
    117.1 km (72.8 mi) depth
    |
    21 km (13 mi) distance
    | GUG (U. Chile) | Details
  • 14 Aug 2021 10:02 UTC
    | M 3.1 |
    125.9 km (78.2 mi) depth
    |
    18 km (11 mi) distance
    | GUG (U. Chile) | Details
  • 12 Aug 2021 18:53 UTC
    | M 3.0 |
    103.8 km (64.5 mi) depth
    |
    20 km (12 mi) distance
    | GUG (U. Chile) | Details
  • 09 Aug 2021 23:17 UTC
    | M 2.8 |
    121.1 km (75.2 mi) depth
    |
    7 km (4 mi) distance
    | GUG (U. Chile) | Details

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.