{"id":35751,"date":"2022-12-17T06:55:22","date_gmt":"2022-12-17T06:55:22","guid":{"rendered":"https:\/\/lesvolcansnews.net\/?p=35751"},"modified":"2022-12-17T08:10:02","modified_gmt":"2022-12-17T08:10:02","slug":"hawai-fin-de-leruption-du-mauna-loa-le-plus-gros-volcan-actif-du-monde","status":"publish","type":"post","link":"https:\/\/lesvolcansnews.net\/?p=35751","title":{"rendered":"Fin de l\u2019\u00e9ruption du Mauna Loa, le plus gros volcan actif du monde"},"content":{"rendered":"<p><strong><em>Retour \u00e0 la normale pour le Mauna Loa. La spectaculaire \u00e9ruption \u00e0 Hawai du plus gros volcan actif du monde, sorti de sa torpeur fin novembre apr\u00e8s 38 ans de calme, est d\u00e9sormais termin\u00e9e, a annonc\u00e9 mardi l\u2019Institut am\u00e9ricain de g\u00e9ophysique (USGS).<\/em><\/strong><\/p>\n<p>Au sommet de sa fureur, le volcan a crach\u00e9 des fontaines de lave jusqu\u2019\u00e0 60 m\u00e8tres de haut et a charri\u00e9 d\u2019impressionnantes coul\u00e9es de roche en fusion. Pendant deux semaines, le Mauna Loa, si large qu\u2019il couvre la moiti\u00e9 de l\u2019\u00eele d\u2019Hawa\u00ef, la plus grande de cet archipel du pacifique, a \u00e9galement \u00e9mis des tonnes de gaz volcanique et r\u00e9pandu dans l\u2019air des cheveux de P\u00e9l\u00e9, des filaments de lave tr\u00e8s aff\u00fbt\u00e9s tirant leur nom de la d\u00e9esse hawa\u00efenne du feu.<\/p>\n<h2>Les habitations n\u2019ont pas \u00e9t\u00e9 affect\u00e9es<\/h2>\n<p>L\u2019\u00e9ruption de ce titan, dont le nom signifie \u00ab Longue Montagne \u00bb en hawa\u00efen, n\u2019a finalement pas affect\u00e9 les habitations de cette \u00eele am\u00e9ricaine. Admir\u00e9e par quantit\u00e9 de scientifiques et de touristes, elle est d\u00e9sormais termin\u00e9e. \u00ab Le Mauna Loa n\u2019est plus en \u00e9ruption \u00bb, ont annonc\u00e9 les scientifiques de l\u2019USGS dans leur dernier bulletin.<\/p>\n<p>Des fissures s\u2019\u00e9taient form\u00e9es sur le flanc nord-est du volcan, o\u00f9 s\u2019\u00e9taient concentr\u00e9es les coul\u00e9es de lave, qui ont un temps menac\u00e9 l\u2019une des routes principales de l\u2019\u00eele. La lave alimentant la derni\u00e8re fissure encore active \u00ab a cess\u00e9 le 10 d\u00e9cembre et les \u00e9missions de dioxyde de sulfure ont diminu\u00e9 \u00e0 des niveaux proches d\u2019avant l\u2019\u00e9ruption \u00bb, a expliqu\u00e9 l\u2019Institut, en soulignant que l\u2019activit\u00e9 sismique associ\u00e9e a elle aussi \u00ab grandement diminu\u00e9 \u00bb.<\/p>\n<h2>Le pr\u00e9c\u00e9dent de 1984<\/h2>\n<p>Les coul\u00e9es de lave doivent d\u00e9sormais refroidir, mais la roche fondue reste br\u00fblante, et certains \u00ab endroits incandescents \u00bb pourraient continuer de rougeoyer encore un bon moment, selon l\u2019USGS. \u00ab N\u00e9anmoins, nous ne nous attendons pas \u00e0 un retour de l\u2019activit\u00e9 \u00e9ruptive, \u00e9tant donn\u00e9 le comportement (du volcan) lors des \u00e9ruptions pr\u00e9c\u00e9dentes \u00bb, a conclu l\u2019Institut.<\/p>\n<p>Le Mauna Loa n\u2019\u00e9tait plus entr\u00e9 en \u00e9ruption depuis 1984. Il avait alors vomi de la lave pendant 22 jours, produisant des coul\u00e9es de lave qui ont \u00e9chou\u00e9 \u00e0 seulement sept kilom\u00e8tres de la ville d\u2019Hilo. Avec un sommet culminant \u00e0 4.169 m\u00e8tres, il est l\u2019un des six volcans actifs de l\u2019archipel d\u2019Hawa\u00ef et a connu 33 \u00e9ruptions depuis 1843. L\u2019\u00eele principale de l\u2019archipel abrite \u00e9galement un volcan l\u00e9g\u00e8rement plus haut, le Mauna Kea \u00e0 4.207 m\u00e8tres d\u2019altitude. Juste au sud-est du Mauna Loa, le volcan Kilauea conna\u00eet lui une activit\u00e9 tr\u00e8s soutenue, avec des \u00e9ruptions quasiment ininterrompues entre 1983 et 2019. Sa derni\u00e8re en date, mineure, est en cours depuis plusieurs mois.<\/p>\n<p>20 MINUTES<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Retour \u00e0 la normale pour le Mauna Loa. La spectaculaire \u00e9ruption \u00e0 Hawai du plus gros volcan actif du monde, sorti de sa torpeur fin novembre apr\u00e8s 38 ans de<\/p>\n","protected":false},"author":14,"featured_media":35761,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-35751","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-societe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fin de l\u2019\u00e9ruption du Mauna Loa, le plus gros volcan actif du monde - LES VOLCANS NEWS<\/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:\/\/lesvolcansnews.net\/?p=35751\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Fin de l\u2019\u00e9ruption du Mauna Loa, le plus gros volcan actif du monde - LES VOLCANS NEWS\" \/>\n<meta property=\"og:description\" content=\"Retour \u00e0 la normale pour le Mauna Loa. 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