{"id":1364,"date":"2014-09-25T17:15:12","date_gmt":"2014-09-25T15:15:12","guid":{"rendered":"http:\/\/wp.unil.ch\/geoblog\/?p=1364"},"modified":"2019-01-28T10:56:13","modified_gmt":"2019-01-28T09:56:13","slug":"voyage-au-centre-de-la-terre","status":"publish","type":"post","link":"https:\/\/wp.unil.ch\/geoblog\/2014\/09\/voyage-au-centre-de-la-terre\/","title":{"rendered":"Voyage au centre de la Terre"},"content":{"rendered":"<p>Conf\u00e9rence de Barbara Romanowicz, professeure au Coll\u00e8ge de France, cycle d\u2019enseignement donn\u00e9 dans le cadre d\u2019un accord UNIL, EPFL et Coll\u00e8ge de France.<br \/>\n<!--more--><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/wp.unil.ch\/geoblog\/files\/2014\/09\/collegedefrance.gif\" alt=\"collegedefrance\" width=\"200\" height=\"74\" class=\"alignleft size-full wp-image-1376\" \/>Les 25 et 26 septembre 2014, Mme Barbara Romanowicz, sismologue de renom, <a href=\"https:\/\/www.college-de-france.fr\/site\/barbara-romanowicz\">professeure au Coll\u00e8ge de France<\/a> et \u00e0 l\u2019Universit\u00e9 de Californie \u00e0 Berkeley, a fait deux interventions fort remarqu\u00e9es \u00e0 l\u2019Universit\u00e9 de Lausanne \u00e0 l\u2019invitation de la Facult\u00e9 des g\u00e9osciences et de l\u2019environnement.<\/p>\n<p>Lors de son premier cours-conf\u00e9rence qui s\u2019adressait \u00e0 un public g\u00e9n\u00e9raliste, Mme Romanowicz a fait le point des connaissances actuelles sur la structure profonde de notre globe terrestre. Elle a ensuite \u00e9voqu\u00e9 les r\u00e9sultats de ses propres recherches sur le manteau terrestre (environ les premiers 3\u2019000 km de profondeur) \u00e0 partir de l\u2019\u00e9tude des ondes sismiques issues de tremblements de terre. Ses recherches indiquent notamment une forte corr\u00e9lation entre la pr\u00e9sence de certains volcans \u00e0 la surface du globe, appel\u00e9s points chauds, et des zones anormales (de vitesse sismique lente) dans le manteau sup\u00e9rieur.<\/p>\n<div style=\"width: 970px;\" class=\"wp-video\"><video class=\"wp-video-shortcode\" id=\"video-1364-1\" width=\"970\" height=\"546\" poster=\"https:\/\/av.unil.ch\/hva\/1703\/14-lfgse-college-de-france-ok_hd.png\" controls=\"controls\"><source type=\"video\/mp4\" src=\"https:\/\/av.unil.ch\/hva\/1703\/14-lfgse-college-de-france-ok_hd.mp4?_=1\" \/><source type=\"video\/webm\" src=\"https:\/\/av.unil.ch\/hva\/1703\/14-lfgse-college-de-france-ok_hd.webm?_=1\" \/><a href=\"https:\/\/av.unil.ch\/hva\/1703\/14-lfgse-college-de-france-ok_hd.mp4\">https:\/\/av.unil.ch\/hva\/1703\/14-lfgse-college-de-france-ok_hd.mp4<\/a><\/video><\/div>\n<p>Lors de sa deuxi\u00e8me intervention, sous forme d\u2019un cours-s\u00e9minaire destin\u00e9 \u00e0 des sp\u00e9cialistes des sciences de la Terre, Mme Romanowicz a pr\u00e9sent\u00e9 les m\u00e9thodes d\u2019analyse et d\u2019inversion des donn\u00e9es sismiques qu\u2019elle a d\u00e9velopp\u00e9es avec ses \u00e9tudiants en France et aux Etats-Unis. Gr\u00e2ce \u00e0 ces techniques, ils ont \u00e9tabli un mod\u00e8le de vitesses sismiques du manteau jusqu\u2019\u00e0 environ 1\u2019000 km de profondeur avec des d\u00e9tails jamais observ\u00e9s jusqu\u2019ici. Comme le souligne la chercheure, ces avanc\u00e9es en sismologie b\u00e9n\u00e9ficieront aux sp\u00e9cialistes des autres domaines des sciences de la Terre qui travaillent \u00e0 mieux comprendre le fonctionnement \u00e0 grande \u00e9chelle de notre globe terrestre.<\/p>\n<div id='gallery-1' class='gallery galleryid-1364 gallery-columns-3 gallery-size-thumbnail'><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/wp.unil.ch\/geoblog\/2014\/09\/voyage-au-centre-de-la-terre\/romanowicz\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/wp.unil.ch\/geoblog\/files\/2014\/09\/romanowicz-150x150.jpeg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/wp.unil.ch\/geoblog\/files\/2014\/09\/romanowicz-150x150.jpeg 150w, https:\/\/wp.unil.ch\/geoblog\/files\/2014\/09\/romanowicz-160x160.jpeg 160w, https:\/\/wp.unil.ch\/geoblog\/files\/2014\/09\/romanowicz-320x320.jpeg 320w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div><\/figure><figure class='gallery-item'>\n\t\t\t<div class='gallery-icon landscape'>\n\t\t\t\t<a href='https:\/\/wp.unil.ch\/geoblog\/2014\/09\/voyage-au-centre-de-la-terre\/romanowicz2\/'><img loading=\"lazy\" decoding=\"async\" width=\"150\" height=\"150\" src=\"https:\/\/wp.unil.ch\/geoblog\/files\/2014\/09\/romanowicz2-150x150.jpeg\" class=\"attachment-thumbnail size-thumbnail\" alt=\"\" srcset=\"https:\/\/wp.unil.ch\/geoblog\/files\/2014\/09\/romanowicz2-150x150.jpeg 150w, https:\/\/wp.unil.ch\/geoblog\/files\/2014\/09\/romanowicz2-160x160.jpeg 160w, https:\/\/wp.unil.ch\/geoblog\/files\/2014\/09\/romanowicz2-320x320.jpeg 320w\" sizes=\"auto, (max-width: 150px) 100vw, 150px\" \/><\/a>\n\t\t\t<\/div><\/figure>\n\t\t<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>Conf\u00e9rence de Barbara Romanowicz, professeure au Coll\u00e8ge de France, cycle d\u2019enseignement donn\u00e9 dans le cadre d\u2019un accord UNIL, EPFL et Coll\u00e8ge de France.<\/p>\n","protected":false},"author":47,"featured_media":4077,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"video","meta":{"_seopress_robots_primary_cat":"","_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[67009,5798],"tags":[],"class_list":{"0":"post-1364","1":"post","2":"type-post","3":"status-publish","4":"format-video","5":"has-post-thumbnail","7":"category-college-de-france","8":"category-evenements","9":"post_format-post-format-video"},"_links":{"self":[{"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/posts\/1364","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/users\/47"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/comments?post=1364"}],"version-history":[{"count":0,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/posts\/1364\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/media\/4077"}],"wp:attachment":[{"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/media?parent=1364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/categories?post=1364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.unil.ch\/geoblog\/wp-json\/wp\/v2\/tags?post=1364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}