Information on the earthquake: moderate mag. 5.5 earthquake – Departamento de Alberdi, 186 km northeast of Ciudad de Santiago del Estero, Departamento de Capital, Santiago del Estero, Argentina, Wednesday, November 17, 2021 at 6:38 p.m. (GMT -3)


Moderate magnitude earthquake 5.5 to 570 km deep

November 17 21:42 UTC: First to report: GFZ after 4 minutes.
November 17 21:46: Magnitude recalculated from 6.1 to 5.5. Hypocenter depth recalculated from 580.0 to 582.0 km (360 to 362 mi). Epicenter location corrected 3.5 km (2.2 mi) towards SSE.
November 17 21:50: Magnitude recalculated from 5.5 to 5.7. Hypocenter depth recalculated from 582.0 to 574.0 km (362 to 357 mi). Epicenter location corrected 1.5 km (0.9 mi) NE.
November 17 21:56: Now using USGS data updates

Updated Wed Nov 17, 2021, 9:54 PM

Moderate magnitude but deep 5.7 earthquake strikes 54 km northwest of Campo Gallo, Argentina in early evening

Earthquake 5.7 November 17 18:38 (GMT -3)

Earthquake 5.7 November 17 18:38 (GMT -3)

Just 15 minutes ago, a magnitude 5.7 earthquake struck near Campo Gallo, Departamento de Alberdi, Santiago del Estero, Argentina. The tremor was recorded in the early evening on Wednesday, November 17, 2021, at 6:38 p.m. local time, at a great depth of 574 km below the surface.
The event was classified by the German Research Center for Geosciences (GFZ), the first seismological agency to report it.
Our monitoring service identified a second report from the National Seismic Surveillance Network (RéNaSS) of France which listed the earthquake at a magnitude of 5.3. A third agency, the Euro-Mediterranean Seismological Center (EMSC), reported the same 5.2 magnitude earthquake.
Cities near the epicenter where the earthquake could have been felt as very weak tremors include Campo Gallo (5,500 inhabitants) located 54 km from the epicenter, El Hoyo (2,200 inhabitants) 75 km, Taco Pozo ( 8,500 inhabitants) 83 km and Tintina (3,900 inhabitants) 97 km.
VolcanoDiscovery will automatically update the magnitude and depth if these change and follow up if other significant earthquake news becomes available. If you are in the region, please share your experience with us through our reporting mechanism, online or through our mobile app. This will help us provide more first-hand updates to anyone in the world who is interested in learning more about this earthquake.

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Earthquake data

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Date and hour : November 17, 2021 09:38:53 PM UTC –
Local time at epicenter: Wednesday November 17, 2021 6:38 pm (GMT -3)
Size: 5.5
Depth: 569.9 km

Latitude / longitude of epicenter: 26.3334 ° S / 63.3403 ° W↗ (Departamento de Alberdi, Santiago del Estero, Argentina)
Antipode: 26.333 ° N / 116.66 ° E↗

Nearby towns and villages:
56 km (35 mi) to WNW of Campo Gallo (Alberdi) (pop: 5,460) -> See nearby earthquakes!
78 km (49 mi) north of El Hoyo (pop: 2,160) -> See nearby earthquakes!
80 km (50 mi) south of Taco Pozo (Chaco) (pop: 8,470) -> See earthquakes nearby!
100 km (62 mi) northwest of Tintine (pop: 3,870) -> Watch the earthquakes nearby!
186 km (116 mi) ENE of Alderetes (Tucuman) (pop: 38,500) -> Observe the earthquakes nearby!
186 km (116 mi) NNE of Ciudad de Santiago del Estero (pop: 354,700) -> Observe the earthquakes nearby!
195 km (121 mi) ENE of San Miguel de Tucuman (pop: 781,000) -> See nearby earthquakes!
196 km (122 mi) ENE of Tafi Viejo (Tucuman) (pop: 48,500) -> Observe the earthquakes nearby!
198 km (123 mi) NE of Termas de Rio Hondo (Río Hondo) (pop: 27,800) -> Observe the earthquakes nearby!
270 km (168 mi) southeast of Salta (pop: 512,700) -> See nearby earthquakes!

Weather at the epicenter at the time of the earthquake:
Clouds covered 13.6 ° C (56 F), humidity: 75%, wind: 2 m / s (3 kts) from WSW

Main data source: USGS (United States Geological Survey)

Estimated energy released: 1.1 x 1013 joules (3.12 gigawatt hours, equivalent to 2682 tonnes of TNT or 0.2 atomic bombs!) More info

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Data for the same earthquake reported by different agencies

Info: The more agencies report the same earthquake and publish similar data, the more confidence you can have in the data. It normally takes up to a few hours for the earthquake parameters to be calculated with near optimum accuracy.

Mag. Depth Site Source
5.5 570 km Province of Santiago Del Estero, Argentina USGS
5.4 614 km SANTIAGO DEL ESTERO (Argentina) INPRES
5.3 595 km Argentina: Near Tucumán RENASS
5.5 574 km 56 Km WNW from Campo Gallo, Argentina GFZ
5.6 560 km Province of Santiago Del Estero, Argentina GeoAu
5.5 582 km Province of Santiago Del Estero, Argentina USP


More information

Aftershocks recorded, latest first (0 earthquakes so far, frequently updated)

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Previous earthquakes in the same region

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