{"id":413,"date":"2014-09-23T16:37:26","date_gmt":"2014-09-23T16:37:26","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/bardintzeff\/?p=413"},"modified":"2017-04-03T15:55:07","modified_gmt":"2017-04-03T15:55:07","slug":"eruption-spectaculaire-en-islande","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/09\/23\/eruption-spectaculaire-en-islande\/","title":{"rendered":"\u00c9ruption spectaculaire en Islande"},"content":{"rendered":"<p>Une importante activit\u00e9 sismique s\u2019est manifest\u00e9e sous le volcan Bardarbunga en Islande \u00e0 partir du 16 ao\u00fbt 2014, Ce gros volcan se situe sous le glacier Dyngjuj\u00f6kull, dans la partie nord du glacier Vatnaj\u00f6kull. En moyenne, pr\u00e8s d\u2019un millier de s\u00e9ismes \u00e9taient enregistr\u00e9s chaque jour par le Nordic Volcanological Institute, la grande majorit\u00e9 de faible magnitude (2 \u00e0 3) mais certains atteignant la magnitude 5.5. Puis les s\u00e9ismes, r\u00e9partis sur une longueur de 40 km, semblaient traduire des mouvements de magma en profondeur le long d\u2019un dyke mais l\u2019\u00e9ruption tardait \u00e0 venir\u2026<\/p>\n<p>Une petite \u00e9ruption fissurale s\u2019est d\u00e9clench\u00e9e le 29 ao\u00fbt,\u00e0 5 km au nord du glacier Dyngjuj\u00f6kull. Elle n\u2019a dur\u00e9 que quelques heures. Des coul\u00e9es de lave ont \u00e9t\u00e9 \u00e9mises le\u00a0long d\u2019une fissure de quelques centaines de m\u00e8tres de longueur.<\/p>\n<p>Une nouvelle \u00e9ruption, de bien plus grande ampleur, d\u00e9marre le 31 ao\u00fbt dans la m\u00eame r\u00e9gion, \u00e0 Holuhraun. Une fissure longue de 1500 m \u00e9met un v\u00e9ritable rideau de lave, de 50 \u00e0 100 m de hauteur. Des coul\u00e9es de lave s\u2019en \u00e9chappent. La plus importante parcourt une quinzaine de km jusqu\u2019au lit de la rivi\u00e8re J\u00f6kuls\u00e1 \u00e1 Fj\u00f6llum.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/09\/Bardintzeff.SDC15993.JMB_.jpg\" rel=\"lightbox[413]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-415\" src=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/09\/Bardintzeff.SDC15993.JMB_-337x450.jpg\" alt=\"Bardintzeff.SDC15993.JMB\" width=\"373\" height=\"498\" srcset=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/09\/Bardintzeff.SDC15993.JMB_-337x450.jpg 337w, https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/09\/Bardintzeff.SDC15993.JMB_-768x1024.jpg 768w, https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/09\/Bardintzeff.SDC15993.JMB_.jpg 1063w\" sizes=\"auto, (max-width: 373px) 100vw, 373px\" \/><\/a><\/p>\n<p>La fissure \u00e9ruptive vue du sud (\u00a9 J.M. Bardintzeff)<\/p>\n<p><!--more--><\/p>\n<p>L\u2019\u00e9ruption se poursuit aujourd\u2019hui. 150 s\u00e9ismes sont encore enregistr\u00e9s en moyenne chaque jour. 37 km<sup>2<\/sup> ont \u00e9t\u00e9 recouverts de lave.<\/p>\n<p>Parall\u00e8lement, on note une subsidence de 25 m dans la caldeira du Bardarbunga o\u00f9 des s\u00e9ismes de magnitude sup\u00e9rieure \u00e0 5 se succ\u00e8dent r\u00e9guli\u00e8rement.<\/p>\n<p>Pour l\u2019instant, l\u2019\u00e9ruption n\u2019est donc pas explosive (\u00e9mission d\u2019un panache de cendres et de gaz, d\u2019une dizaine de km de hauteur) contrairement \u00e0 celle de 2010 sous le glacier Eyjafjallaj\u00f6kull, qui bloqua le trafic a\u00e9rien europ\u00e9en. Mais une migration de l\u2018activit\u00e9 magmatique sous le glacier Vatnaj\u00f6kull n\u2019est pas exclue.<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/09\/Bardintzeff.SDC15996.JMB_.jpg\" rel=\"lightbox[413]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-418\" src=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/09\/Bardintzeff.SDC15996.JMB_-450x337.jpg\" alt=\"Bardintzeff.SDC15996.JMB\" width=\"450\" height=\"337\" srcset=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/09\/Bardintzeff.SDC15996.JMB_-450x337.jpg 450w, https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/09\/Bardintzeff.SDC15996.JMB_-1024x768.jpg 1024w, https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/09\/Bardintzeff.SDC15996.JMB_.jpg 1701w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>Quatre events principaux s\u2019individualisent dans la fissure \u00e9ruptive (\u00a9 J.M. Bardintzeff)<\/p>\n<p>J\u2019ai pu accompagner, comme conseiller scientifique, l\u2019\u00e9quipe du tournage du film \u00ab Terra \u00bb (r\u00e9alisateurs Yann Arthus-Bertrand et Michael Pitiot). Nous avons survol\u00e9 en h\u00e9licopt\u00e8re la fissure \u00e9ruptive le 11 septembre 2014.<\/p>\n<p>(\u00e0 suivre)<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Une importante activit\u00e9 sismique s\u2019est manifest\u00e9e sous le volcan Bardarbunga en Islande \u00e0 partir du 16 ao\u00fbt 2014, Ce gros volcan se situe sous le glacier Dyngjuj\u00f6kull, dans la partie nord du glacier Vatnaj\u00f6kull. En moyenne, pr\u00e8s d\u2019un millier de s\u00e9ismes \u00e9taient enregistr\u00e9s chaque jour par le Nordic Volcanological Institute, la grande majorit\u00e9 de faible &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/09\/23\/eruption-spectaculaire-en-islande\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">\u00c9ruption spectaculaire en Islande<\/span>  <span class=\"meta-nav\">&rarr;<\/span><\/a><!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[6],"tags":[17,104,98],"class_list":["post-413","post","type-post","status-publish","format-standard","hentry","category-actualites","tag-eruption","tag-fontaine-de-lave","tag-islande"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u00c9ruption spectaculaire en Islande, par Jacques-Marie Bardintzeff<\/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:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/09\/23\/eruption-spectaculaire-en-islande\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u00c9ruption spectaculaire en Islande, par Jacques-Marie Bardintzeff\" \/>\n<meta property=\"og:description\" content=\"Une importante activit\u00e9 sismique s\u2019est manifest\u00e9e sous le volcan Bardarbunga en Islande \u00e0 partir du 16 ao\u00fbt 2014, Ce gros volcan se situe sous le glacier Dyngjuj\u00f6kull, dans la partie nord du glacier Vatnaj\u00f6kull. En moyenne, pr\u00e8s d\u2019un millier de s\u00e9ismes \u00e9taient enregistr\u00e9s chaque jour par le Nordic Volcanological Institute, la grande majorit\u00e9 de faible &hellip; Continuer la lecture de \u00c9ruption spectaculaire en Islande &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/09\/23\/eruption-spectaculaire-en-islande\/\" \/>\n<meta property=\"og:site_name\" content=\"VOLCANMANIA : le blog de Jacques-Marie BARDINTZEFF, volcanologue\" \/>\n<meta property=\"article:published_time\" content=\"2014-09-23T16:37:26+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2017-04-03T15:55:07+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/09\/Bardintzeff.SDC15993.JMB_.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1063\" \/>\n\t<meta property=\"og:image:height\" content=\"1417\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"jmbardintzeff\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"jmbardintzeff\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/09\/23\/eruption-spectaculaire-en-islande\/\",\"url\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/09\/23\/eruption-spectaculaire-en-islande\/\",\"name\":\"\u00c9ruption spectaculaire en Islande, par Jacques-Marie Bardintzeff\",\"isPartOf\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/09\/23\/eruption-spectaculaire-en-islande\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/09\/23\/eruption-spectaculaire-en-islande\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/09\/Bardintzeff.SDC15993.JMB_-337x450.jpg\",\"datePublished\":\"2014-09-23T16:37:26+00:00\",\"dateModified\":\"2017-04-03T15:55:07+00:00\",\"author\":{\"@id\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/#\/schema\/person\/974e1e0324e3e06f08253784e8eca61e\"},\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/09\/23\/eruption-spectaculaire-en-islande\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"fr-FR\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2014\/09\/23\/eruption-spectaculaire-en-islande\/#primaryimage\",\"url\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/09\/Bardintzeff.SDC15993.JMB_.jpg\",\"contentUrl\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2014\/09\/Bardintzeff.SDC15993.JMB_.jpg\",\"width\":1063,\"height\":1417},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/#website\",\"url\":\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/\",\"name\":\"VOLCANMANIA : le blog de Jacques-Marie BARDINTZEFF, volcanologue\",\"description\":\"Les volcans ? 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