Light mag. 4.5 earthquake - 86 km northeast of Calama, El Loa, Antofagasta, Chile, on Saturday, Oct 31, 2020 8:08 am (GMT -3) -

Light mag. 4.5 earthquake - 86 km northeast of Calama, El Loa, Antofagasta, Chile, on Saturday, Oct 31, 2020 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.

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Earthquake data

Date & time: Oct 31, 2020 11:08:35 UTC -
Local time at epicenter: Saturday, Oct 31, 2020 8:08 am (GMT -3)
Magnitude: 4.5
Depth: 122.0 km
Epicenter latitude / longitude: 21.78°S / 68.51°W (Provincia de El Loa, Antofagasta, Chile)
Antipode: 21.78°N / 111.49°E
Nearest volcano: San Pedro (17 km / 11 mi)
Nearby towns and cities:
86 km (54 mi) NNE of Calama (pop: 143,100) --> See nearby quakes!
130 km (81 mi) NNW of San Pedro de Atacama (pop: 2,000) --> See nearby quakes!
155 km (96 mi) WSW of San Cristobal de Lipez (Potosí, Bolivia) (pop: 75) --> See nearby quakes!
178 km (110 mi) E of Tocopilla (pop: 24,500) --> See nearby quakes!
228 km (142 mi) SW of Uyuni (Antonio Quijarro, Potosí, Bolivia) (pop: 10,300) --> See nearby quakes!
232 km (144 mi) SW of Colchani (Potosí, Bolivia) (pop: 12,000) --> See nearby quakes!
244 km (151 mi) SE of Iquique (Tarapacá) (pop: 227,500) --> See nearby quakes!
272 km (169 mi) WSW of Santa Barbara (Potosí, Bolivia) (pop: 2,430) --> See nearby quakes!
284 km (177 mi) NE of Antofagasta (pop: 309,800) --> See nearby quakes!
352 km (219 mi) NW of San Antonio de los Cobres (Salta, Argentina) (pop: 4,000) --> See nearby quakes!
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 (European-Mediterranean Seismological Centre)
Estimated released energy: 3.5 x 1011 joules (98.6 megawatt hours, equivalent to 84.8 tons of TNT) More info
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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.
4.5122 km- 85 km NNE of Calama, ChileEMSC
4.1126 km69 Km Al SO De Ollagüe, ChileGUG (U. Chile)
4.5119 km85 Km NNE of Calama, ChileUSGS
4.6117 kmChile-Bolivia Border RegionUSP
4.1136 kmChile-Bolivia Border RegionGFZ

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.
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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  
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