{"id":32843,"date":"2020-04-07T20:00:55","date_gmt":"2020-04-07T18:00:55","guid":{"rendered":"https:\/\/leregardlibre.com\/?p=32843"},"modified":"2023-08-08T17:11:28","modified_gmt":"2023-08-08T15:11:28","slug":"one-day-in-563-the-leman-wave","status":"publish","type":"post","link":"https:\/\/leregardlibre.com\/en\/litterature\/un-jour-de-563-le-vague-a-lame-du-leman\/","title":{"rendered":"One day in 563, the vague \u00e0 l'\u00e2me of Lake Geneva"},"content":{"rendered":"\n

Avec simplicit\u00e9 et adresse, preuves scientifiques \u00e0 l\u2019appui, Pierre-Yves Frei et Sandra Marongiu, dans une enqu\u00eate qui traverse les \u00e9poques, nous expliquent les raisons et les effets du terrible tsunami qui eut lieu en 563. Et qui emporta, dans sa rage, des moulins et des hommes.<\/strong><\/p>\n\n\n\n\n\n\n\n

Le L\u00e9man, le beau L\u00e9man d\u2019eau douce, calme et ti\u00e8de en \u00e9t\u00e9, parcouru de long en large par des milliers de baigneurs, a connu en 563 un tsunami d\u2019une ampleur et d\u2019une allure folle: Le Tauredunum. C\u2019est sous la plume des chroniqueurs chr\u00e9tiens de l\u2019\u00e9poque, Marius, \u00e9v\u00eaque d\u2019Avanches et Gr\u00e9goire de Tours, \u00e9v\u00eaque du Royaume des Francs, que Le Tauredunum, le mont Taure, appara\u00eet comme \u00e9tant \u00e0 l\u2019origine d\u2019un tsunami aux vagues torrentielles, v\u00e9ritable fl\u00e9au qui balaya sur son passage les b\u00e2tisses, les animaux, les moulins et les hommes, comme le relate l\u2019\u00e9v\u00eaque d\u2019Avanches:<\/p>\n\n\n\n

\u00abPost-consulat de Basilius, 22e<\/sup> ann\u00e9e, 11e<\/sup> indiction<\/em>: Cette ann\u00e9e-ci, la grande montagne du Tauredunum dans le dioc\u00e8se du Valais s\u2019\u00e9croula si brusquement qu\u2019elle \u00e9crasa un bourg qui \u00e9tait proche, des villages et en m\u00eame temps tous leurs habitants. Sa chute mit aussi en mouvement tout le lac, long de 60 milles et large de 20 milles, qui, sortant de ses deux rives, d\u00e9truisit des villages tr\u00e8s anciens avec hommes et b\u00e9tail. Le lac d\u00e9molit m\u00eame beaucoup d\u2019\u00e9glises avec ceux qui les desservaient. Enfin, il emporta dans sa violence le pont de Gen\u00e8ve, les moulins et les hommes et, entrant dans la cit\u00e9 de Gen\u00e8ve, il tua beaucoup d\u2019hommes.\u00bb<\/p><\/blockquote>\n\n\n\n

Transformer une hypoth\u00e8se en certitude<\/h3>\n\n\n\n

Ces chroniques incroyables ont d\u00e9pass\u00e9 les si\u00e8cles pour arriver jusqu\u2019\u00e0 nous, \u00e9vitant l\u2019incendie, la guerre, la moisissure, l\u2019eau et l\u2019oubli, heurtant la curiosit\u00e9 de plusieurs scientifiques de tous bords, de toute \u00e9poque. Il aura fallu n\u00e9anmoins attendre 2010, l\u2019intervention de Katrina Kremer et St\u00e9phanie Girardclos, deux g\u00e9ologues de l\u2019Universit\u00e9 de Gen\u00e8ve, pour r\u00e9ussir ce tour de force propre \u00e0 la science, qui est de transformer une hypoth\u00e8se en une certitude. Auscultant avec un \u00e9chosondeur les s\u00e9diments qui dormaient au fond du lac depuis des mill\u00e9naires, elles y d\u00e9couvrirent une couche \u00e9paisse, imposante et ancienne, trace irr\u00e9futable du Tauredunum qu\u2019elles contr\u00f4l\u00e8rent au moyen d\u2019un carottier, en pr\u00e9levant quatre carottes de douze m\u00e8tres en diff\u00e9rents points de la couche s\u00e9dimentaire, analys\u00e9es ensuite.<\/p>\n\n\n\n

La l\u00e9gende \u00e9crite du pass\u00e9 devint une r\u00e9alit\u00e9 fascinante, \u00e9tablie et document\u00e9e. Il aura fallu attendre quinze si\u00e8cles pour y parvenir. Bien que des controverses scientifiques entre savants vaudois et valaisans eurent lieu sur l\u2019origine de la catastrophe, un jour de 563, le vague \u00e0 l\u2019\u00e2me du L\u00e9man d\u00e9buta par l\u2019\u00e9boulement du sommet de La Suche. Les roches tomb\u00e9es roul\u00e8rent de la plaine du Rh\u00f4ne au lac, \u00e0 grande vitesse, emportant tout avec elles jusqu\u2019\u00e0 s\u2019enfoncer dans le lac. Ce qui cr\u00e9a une s\u00e9rie de vagues meurtri\u00e8res, qui se d\u00e9plac\u00e8rent \u00e0 70km\/h et dont la plus haute faisait 13 m\u00e8tres, au niveau de Lausanne, selon le sc\u00e9nario de mod\u00e9lisation num\u00e9rique con\u00e7u par le physicien Guy Simpson.<\/p>\n\n\n\n

Pierre-Yves Frei et Sandra Marongiu, auteurs du livre, en plus d\u2019informer le lecteur sur le Tauredunum avec simplicit\u00e9 et adresse, proposent un retour historique sur les rives du L\u00e9man, color\u00e9es par les changements de peuples et de cultures, forg\u00e9es par la formation des Alpes, creus\u00e9es par l\u2019extension lente des glaciers et p\u00e9tries par la lutte de la terre et de la glace, sous l\u2019\u0153il d\u00e9bonnaire du soleil. Riche en illustrations avec des tableaux, de David Alois Schmid ou Hodler, plusieurs photographies, des graphiques soign\u00e9s, un rep\u00e8re chronologique et une bibliographie, ces recherches sauront apaiser la soif des plus curieux. Qui apprendront aussi qu\u2019il y a eu d\u2019autres tsunamis sur le L\u00e9man, comme celui qui s\u2019est produit entre -1780 et -1620 \u00e0 l\u2019\u00e9poque des villages palafittiques, et des tsunamis sur d\u2019autres lacs du monde. <\/p>\n\n\n\n

Le livre apporte donc sa contribution \u00e0 l\u2019histoire universelle. La grande question \u00e9tant: est-ce qu\u2019un nouveau tsunami pourrait avoir lieu aujourd\u2019hui, en 2020, sur le L\u00e9man? C\u2019est avec cette question lancinante au fond de la gorge que le lecteur, assis au bord du L\u00e9man, en \u00e9t\u00e9, triturant nerveusement sa serviette de bain, laissera tomber ce livre, puis avec une expression m\u00e9dus\u00e9e tournera son regard inquiet vers le lac, tandis que ses l\u00e8vres murmureront: Papa, Maman[1]<\/a>.<\/p>\n\n\n\n

\n\n\n\n

[1]<\/a> Paraphrase \u00e9hont\u00e9e de la fameuse citation d\u2019Aragon: \u00abUn livre est excellent si le lecteur, d\u00e9chirant son mouchoir inutile, laisse tomber soudain l\u2019exemplaire parcouru, puis avec une expression c\u00e9leste tourne vers le ciel un regard de reconnaissance tandis que ses l\u00e8vres murmurent : Papa, Maman.\u00bb Trait\u00e9 du style<\/em>, Aragon.<\/p>\n\n\n\n

Cr\u00e9dit photo: \u00a9 Emiliano Arano\/Pexels<\/p>\n\n\n\n

Ecrire \u00e0 l’auteur: arthur.billerey@leregardlibre.com<\/a><\/em><\/p>\n\n\n\n

\"\"<\/figure>
\n

Pierre-Yves Frei et Sandra Marongiu
Un tsunami sur le L\u00e9man, Tauredaunum 563<\/em>
PPUR
2020
200 pages<\/strong><\/p>\n<\/div><\/div>\n\n\n\n

\n
acheter<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

An investigation that spans the ages.<\/p>","protected":false},"author":331,"featured_media":32848,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[20663],"tags":[54879,644346656,2393859,644346655,644346654,644346651,644346649],"class_list":["post-32843","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-litterature","tag-critiques-litteraires","tag-la-suche","tag-lac-leman","tag-mont-taure","tag-tauredunum","tag-tsunami","tag-yves-frei"],"acf":[],"yoast_head":"\nUn jour de 563, le vague \u00e0 l\u2019\u00e2me du L\u00e9man<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/leregardlibre.com\/en\/literature\/one-day-in-563-the-leman-wave\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" 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