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1946 Valais earthquake
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Earthquake in Switzerland
March 2024
1946 Valais earthquake ETH-BIB-Rawil Erdbeben von 30.05.46, Absturz-Flanken am Rawilhorn-Dia 247-14750.tif Rockslide at the Combe des Andins Switzerland
25 January 1946 17:32 CET 6.2 w y 46.4 7.5 inline,title Switzerland and France 8 Three recorded. The largest was a 5.9 w 3 dead in Switzerland1 dead in France 1946-01-25 17:31:50 iscgem898227 898227
The 1946 Valais earthquake struck on 25 January at 17:32 local time with an epicenter region in Sierre, near the capital city of Sion in Valais, a canton in Switzerland. The earthquake had an estimated moment magnitude (w) of 6.2 and a maximum Modified Mercalli intensity of VIII (Severe).Earthquake Catalog of Switzerland 2009 http://ecos09.seismo.ethz.ch/index.html ecos09.seismo.ethz.ch Swiss Seismological Service 2 September 2021Swiss Seismological Service Earthquake Catalog of Switzerland 2002 https://emidius.mi.ingv.it/ASMI/study/ECOS-02 Italian Macroseismic Historical Archive 2 September 2021 Zurich, Switzerland 2002 10.5169/seals-169017 ISC-GEM Global Instrumental Earthquake Catalogue (1900–2009) http://www.isc.ac.uk/iscgem/index.php ISC 27 June 2022 International Seismological Centre Version 9.1
Earthquake
The earthquake immediately disrupted the supply of power in Sierre, and other nearby populated centers in the Valais canton. The tremors caused panic and drove residents out of their homes. Many homes suffered damage to their structure, with chimneys destroyed, detached roof tiles, and broken facades. A newly constructed church in Chippis partially collapsed and had some of the remaining structures severely damaged and unstable. Despite the severity of damage, with 3,500 buildings damaged, there were very few injuries or deaths reported; three persons suffered fatal shocks and another was crushed to death by a car in Aix-les-Bains, France.Sierre 1946 http://www.seismo.ethz.ch/en/knowledge/earthquake-country-switzerland/historical-earthquakes/sierre-1946/ seismo.ethz.ch Swiss Seismological Service 2 September 2021 2 September 2021 https://web.archive.org/web/20210902021248/http://www.seismo.ethz.ch/en/knowledge/earthquake-country-switzerland/historical-earthquakes/sierre-1946/ dead Twenty-one rockfalls, one major, occurred. The earthquake also triggered 11 landslides, four avalanches, and a number of ground effects along the Rhône river valley. The landslides and rockfalls reportedly destroyed huts and barns near the mountainside. Damage was also reported in the district of Vaud in Villeneuve. In Château-d'Œx, the quake knocked display items onto the ground at an art exhibition.Vor 75 Jahren erschütterte ein gewaltiges Erdbeben das Wallis https://telebasel.ch/2021/01/25/vor-75-jahren-erschuetterte-ein-gewaltiges-erdbeben-das-wallis/?channel=105105 Telebasel Report 2 September 2021 German 25 January 2021 2 September 2021 https://web.archive.org/web/20210902021256/https://telebasel.ch/2021/01/25/vor-75-jahren-erschuetterte-ein-gewaltiges-erdbeben-das-wallis/?channel=105105 dead The total damage is estimated at 5.265 million Swiss francs in 1946, or 25.7 million in 2021.Stefan Fritsche Donat Fäh The 1946 magnitude 6.1 earthquake in the Valais: site-effects as contributor to the damage 423 Swiss Journal of Geosciences 2009 102 423-439 10.1007/s00015-009-1340-2 https://core.ac.uk/download/pdf/159152151.pdf 20.500.11850/21268 129575031 free
Foreshocks and aftershocks
Three large aftershocks were recorded up till May 1946. The first two measured 5.2 and 5.1 on 26 January and 4 February were assigned maximum intensities VI to V. The largest occurred on May 30 with a magnitude of w 5.9 and maximum intensity of VII. The aftershock on May 30 triggered 22 rockfalls and three landslides.Stefan Fritsche Donat Fäh Gabriela Schwarz-Zanetti Historical intensity VIII earthquakes along the Rhone valley (Valais, Switzerland): primary and secondary effects Swiss Journal of Geosciences 2012 105 1–18 10.1007/s00015-012-0095-3 Springer 20.500.11850/61304 129867266 free
Prior to the mainshock, two notable foreshocks occurred on November 10 and 13 with respective intensities V and IV on the Rossi-Forel scale.
See also
List of earthquakes in 1946
List of earthquakes in Switzerland
List of earthquakes in France
References
Category:1946 earthquakes
Category:Earthquakes in Switzerland
Category:1946 in Switzerland
Category:History of Valais
Category:Sierre
Category:Earthquakes in France
Category:Savoie
Category:Aix-les-Bains
Category:1946 disasters in Switzerland