{"id":2621,"date":"2017-08-25T13:43:47","date_gmt":"2017-08-25T13:43:47","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/bardintzeff\/?p=2621"},"modified":"2017-08-25T13:47:25","modified_gmt":"2017-08-25T13:47:25","slug":"volcan-ne-champ-de-ble","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2017\/08\/25\/volcan-ne-champ-de-ble\/","title":{"rendered":"Le volcan n\u00e9 dans un champ de bl\u00e9"},"content":{"rendered":"<p>C\u2019est l\u2019histoire extraordinaire du Showa-shinzan dans l\u2019\u00eele d\u2019Hokkaido au Japon. Le 23 d\u00e9cembre 1943, tout pr\u00e8s du volcan Usu, des s\u00e9ismes sont ressentis et le sol, plant\u00e9 de c\u00e9r\u00e9ales, se soul\u00e8ve\u00a0! Six mois plus tard, le 23 juin 1944 il domine de 150 m son niveau initial, perturbant la nappe aquif\u00e8re et entrainant des inondations ! Une \u00e9ruption explosive d\u00e9bute alors, qui dure jusqu\u2019\u00e0 fin octobre 1944. Elle est suivie d\u2019une phase effusive qui dure un an (soit presque jusqu\u2019\u00e0 fin 1945), avec la surrection d\u2019un d\u00f4me, qui perce le sol et se soul\u00e8ve de 125 m suppl\u00e9mentaire, soit 275 m de gain d\u2019altitude total depuis le d\u00e9but de l\u2019\u00e9v\u00e9nement.<\/p>\n<p>Le Showa-shinzan culmine \u00e0 398 m et il lib\u00e8re toujours des fumerolles.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-2625\" src=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2017\/08\/Bardintzeff.SAM_0665.Showa_shinzan.low_.s-450x338.jpg\" alt=\"\" width=\"509\" height=\"382\" srcset=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2017\/08\/Bardintzeff.SAM_0665.Showa_shinzan.low_.s-450x338.jpg 450w, https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2017\/08\/Bardintzeff.SAM_0665.Showa_shinzan.low_.s-768x576.jpg 768w, https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2017\/08\/Bardintzeff.SAM_0665.Showa_shinzan.low_.s-1024x768.jpg 1024w, https:\/\/blogs.futura-sciences.com\/bardintzeff\/wp-content\/uploads\/sites\/3\/2017\/08\/Bardintzeff.SAM_0665.Showa_shinzan.low_.s.jpg 1417w\" sizes=\"auto, (max-width: 509px) 100vw, 509px\" \/>Le d\u00f4me de lave visqueuse du Showa-shinzan \u00e0 Holkkaido, Japon (\u00a9 J.M. Bardintzeff).<\/p>\n<p><!--more--><\/p>\n<p>La premi\u00e8re phase de soul\u00e8vement (23 d\u00e9cembre 1943 &#8211; 23 juin 1944) correspond \u00e0 la croissance d\u2019un d\u00f4me de lave souterrain, appel\u00e9 crypto-d\u00f4me (litt\u00e9ralement \u00ab\u00a0d\u00f4me cach\u00e9\u00a0\u00bb). Puis l\u2019 \u00ab intrusion\u00a0\u00bb en profondeur devient \u00ab\u00a0extrusion\u00a0\u00bb lorsqu\u2019elle appara\u00eet en surface (voir Bardintzeff, \u00ab\u00a0Volcanologie\u00a0\u00bb, Dunod, 5<sup>e<\/sup> \u00e9d., 2016).<\/p>\n<p>L\u2019ensemble des ph\u00e9nom\u00e8nes a \u00e9t\u00e9 minutieusement suivi par Masao Mimatsu, directeur des postes sur place, devenu donc \u00ab\u00a0g\u00e9om\u00e8tre\u00a0\u00bb.<\/p>\n<p>Cette m\u00eame ann\u00e9e 1943, un autre volcan, le Paricutin, apparaissait au Mexique dans un champ de ma\u00efs\u00a0!<\/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>C\u2019est l\u2019histoire extraordinaire du Showa-shinzan dans l\u2019\u00eele d\u2019Hokkaido au Japon. Le 23 d\u00e9cembre 1943, tout pr\u00e8s du volcan Usu, des s\u00e9ismes sont ressentis et le sol, plant\u00e9 de c\u00e9r\u00e9ales, se soul\u00e8ve\u00a0! Six mois plus tard, le 23 juin 1944 il domine de 150 m son niveau initial, perturbant la nappe aquif\u00e8re et entrainant des inondations &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/bardintzeff\/2017\/08\/25\/volcan-ne-champ-de-ble\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Le volcan n\u00e9 dans un champ de bl\u00e9<\/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":[8],"tags":[21,944,217,380,17,488,557,94,945,585,946,947,3,329],"class_list":["post-2621","post","type-post","status-publish","format-standard","hentry","category-voyages","tag-bardintzeff","tag-crypto-dome","tag-dome","tag-dunod","tag-eruption","tag-fumerolle","tag-hokkaido","tag-japon","tag-masao-mimatsu","tag-paricutin","tag-showa-shinzan","tag-usu","tag-volcan","tag-volcanologie"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Le volcan n\u00e9 dans un champ de bl\u00e9, 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\/2017\/08\/25\/volcan-ne-champ-de-ble\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le volcan n\u00e9 dans un champ de bl\u00e9, par Jacques-Marie Bardintzeff\" \/>\n<meta property=\"og:description\" content=\"C\u2019est l\u2019histoire extraordinaire du Showa-shinzan dans l\u2019\u00eele d\u2019Hokkaido au Japon. 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