Mag. 4.5 earthquake - 86 km northeast of Calama, El Loa, Antofagasta, Chile, on Saturday, 31 Oct 8.08 am (GMT -3) -

Mag. 4.5 earthquake  - 86 km northeast of Calama, El Loa, Antofagasta, Chile, on Saturday, 31 Oct 8.08 am (GMT -3)

Light magnitude 4.5 earthquake at 122 km depth

31 Oct 11:24 UTC: First to report: EMSC after 15 minutes.
31 Oct 11:29: Magnitude recalculated from 4.1 to 4.5. Hypocenter depth recalculated from 130.0 to 122.0 km (from 81 to 76 mi). Epicenter location corrected by 5.3 km (3.3 mi) towards SE.
31 Oct 14:26: Epicenter location corrected by 1.5 km (0.9 mi) towards SE.
Update Sat, 31 Oct 2020, 11:36
Light 4.5 quake hits near Calama, Chile
4.5 quake 87 km NE of Calama, Chile, 31 Oct 8.08 am (GMT -3)
4.5 quake 87 km NE of Calama, Chile, 31 Oct 8.08 am (GMT -3)
An earthquake of magnitude 4.5 occurred in the morning on Saturday 31 October 2020 at 8.08 am local time near the city of Calama, Chile, as reported by the European-Mediterranean Seismological Centre (EMSC).
According to preliminary data, the quake was located at a relatively great depth of 122 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 magnitude, exact epicenter location and depth of the quake are likely to be revised within the next few hours as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service at VolcanoDiscovery identified a second report from the United States Geological Survey (USGS) which listed the quake at magnitude 4.5 as well. A third agency, the National Seismological Center of the University of Chile, reported the same quake at magnitude 4.1.
Towns or cities near the epicenter where the quake might have been felt, based on preliminary calculations, include Calama (pop. 143,100) at a distance of 87 km with very weak shaking.
This story will be updated soon by VolcanoDiscovery. If you’re in the area, please send us your experience through our reporting mechanism. 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: 31 Oct 2020 11:08:35 UTC -
Local time at epicenter: Saturday, 31 Oct 8.08 am (GMT -3)
Magnitude: 4.5
Depth: 122.0 km
Epicenter latitude / longitude: 21.78°S / 68.51°W (Chile)
Nearest volcano: San Pedro (17 km / 11 mi)
Nearby towns and cities:
16 km (10 mi) NE of Tapiche (Provincia de El Loa)
17 km (11 mi) ESE of Condoroma (Provincia de El Loa)
26 km (16 mi) SE of Aimani (Provincia de El Loa)
29 km (18 mi) NW of El Ojo de San Pedro (Provincia de El Loa)
30 km (18 mi) NE of Conchi Viejo (Provincia de El Loa)
86 km (54 mi) NNE of Calama (El Loa) (pop: 143,100)
460 km (286 mi) NW of Salta (Argentina) (pop: 512,700)
1316 km (818 mi) N of Santiago (pop: 4,837,300)
Weather at epicenter at time of quake:
Clear Sky 7.3°C (45 F), humidity: 26%, wind: 1 m/s (2 kts) from NE
Primary data source: EMSC
Estimated released energy: 3.5 x 1011 joules (98.6 megawatt hours, equivalent to 84.8 tons of TNT) [learn more]
[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.
M 4.5122 km- 85 km NNE of Calama, ChileEMSC
M 4.1126 km69 Km Al SO De Ollagüe, ChileGUG (U. Chile)
M 4.5119 km85 Km NNE of Calama, ChileUSGS
M 4.6117 kmChile-Bolivia Border RegionUSP
M 4.1136 kmChile-Bolivia Border RegionGFZ
M 4.5119 km85 Km NNE of Calama, ChileUSGS

User reports for this quake (1)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
Arica (407.7 km NNW of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 15-20 s : Well,i just wait till the earthquake stops and thats all
Volcanoes & Earthquakes - new app for Android

Earlier earthquakes in the same area since 1900

Mag. 4.5 earthquake - 86 km northeast of Calama, El Loa, Antofagasta, Chile, on Saturday, 31 Oct 8.08 am (GMT -3)

Map of earlier quakes

Volcanoes & Earthquakes - new app for Android

More on VolcanoDiscovery

Why is there advertising on this site?

Support us!

Maintaining the website and our free apps is a time- and cost-intensive effort.
If you find the information useful and would like to support our team to develop further features and get the upgraded ad-free version, consider making a donation (PayPal or Online cc payment).
Planned features:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
Thanks to your past donations, these features have been added recently:
  • Earthquake archive back to 1900
  • Additional 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.