{"id":16593,"date":"2022-09-29T09:49:14","date_gmt":"2022-09-29T09:49:14","guid":{"rendered":"https:\/\/blogs.futura-sciences.com\/feldmann\/?p=16593"},"modified":"2022-10-07T16:35:56","modified_gmt":"2022-10-07T16:35:56","slug":"soleil-deux-trous-coronaux-declenchent-de-belles-aurores","status":"publish","type":"post","link":"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/09\/29\/soleil-deux-trous-coronaux-declenchent-de-belles-aurores\/","title":{"rendered":"Soleil : deux trous coronaux d\u00e9clenchent de belles aurores"},"content":{"rendered":"<p><strong>Face \u00e0 la Terre, deux grands trous coronaux \u00e0 la surface du Soleil sont \u00e0 l&#8217;origine d&#8217;une s\u00e9rie de magnifiques aurores bor\u00e9ales.<\/strong><\/p>\n<h5>Que sont les trous coronaux ?<\/h5>\n<p>Les champs magn\u00e9tiques \u00e0 la surface du\u00a0<a href=\"https:\/\/www.futura-sciences.com\/sciences\/questions-reponses\/astronomie-soleil-notre-etoile-va-t-elle-mourir-9545\/\" target=\"_blank\" rel=\"noopener\">Soleil<\/a> sont en g\u00e9n\u00e9ral des champs ferm\u00e9s. Ils sortent de la surface de notre \u00e9toile pour y rentrer un peu plus loin, formant ainsi des boucles. Mais pour des raisons encore inexpliqu\u00e9es, il arrive que certaines boucles ne se referment pas. On observe alors des zones de champs magn\u00e9tiques ouverts surnomm\u00e9es \u00ab trous coronaux \u00bb en raison de leur aspect sombre sur les clich\u00e9s. L&#8217;image solaire de ce jour pr\u00e9sent\u00e9e par la <a href=\"https:\/\/www.swpc.noaa.gov\/\" target=\"_blank\" rel=\"noopener\">NOAA<\/a> nous permet de visualiser deux trous coronaux tourn\u00e9s vers la Terre :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/09\/trou_coronal2.jpg\" rel=\"lightbox[16593]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-16595\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/09\/trou_coronal2-450x450.jpg\" alt=\"\" width=\"450\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/09\/trou_coronal2-450x450.jpg 450w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/09\/trou_coronal2-150x150.jpg 150w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/09\/trou_coronal2.jpg 554w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/a><\/p>\n<p>De ces trous s&#8217;\u00e9chappent de violentes bouff\u00e9es de vent solaire qui peuvent \u00eatre \u00e0 l&#8217;origine de temp\u00eates g\u00e9omagn\u00e9tiques dans notre haute atmosph\u00e8re. Avec \u00e0 la cl\u00e9 de belles aurores.<!--more--><\/p>\n<h5>Grandioses aurores :<\/h5>\n<p>La Terre subit depuis quelques jours l&#8217;arriv\u00e9e de ces particules solaires \u00e9nerg\u00e9tiques. Elles ont d\u00e9j\u00e0 d\u00e9clench\u00e9 une temp\u00eate de niveau G2 sur une \u00e9chelle d\u2019intensit\u00e9 d\u00e9finie par la NOAA, \u00e9chelle qui s\u2019\u00e9chelonne de G1 (mineure) \u00e0 G5 (extr\u00eame). Et les photographes install\u00e9s sous les hautes latitudes en profitent. C&#8217;est le cas par exemple de <a href=\"https:\/\/www.petrhoralek.com\/\" target=\"_blank\" rel=\"noopener\">Petr Hor\u00e1lek<\/a> qui a immortalis\u00e9 ce magnifique spectacle depuis la Norv\u00e8ge :<\/p>\n<p><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/09\/aurore1.jpg\" rel=\"lightbox[16593]\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-16596\" src=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/09\/aurore1-293x450.jpg\" alt=\"\" width=\"293\" height=\"450\" srcset=\"https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/09\/aurore1-293x450.jpg 293w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/09\/aurore1-666x1024.jpg 666w, https:\/\/blogs.futura-sciences.com\/feldmann\/wp-content\/uploads\/sites\/9\/2022\/09\/aurore1.jpg 730w\" sizes=\"auto, (max-width: 293px) 100vw, 293px\" \/><\/a><\/p>\n<p>On peut retrouver d&#8217;autres spectaculaires images de ces aurores sur la page que leur consacre le site <a href=\"https:\/\/spaceweathergallery.com\/aurora_gallery.html\" target=\"_blank\" rel=\"noopener\"><em>Spaceweather<\/em><\/a>.<\/p>\n<h5>Vous pourriez aimer :<\/h5>\n<ul>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/08\/24\/nuages-noctiluques-et-aurore-boreale-dans-le-ciel-de-finlande\/\" target=\"_blank\" rel=\"noopener\">Nuages noctiluques et aurore bor\u00e9ale dans le ciel de Finlande<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/11\/07\/derniere-magnifique-aurore-boreale-pour-thomas-pesquet\/\" target=\"_blank\" rel=\"noopener\">Derni\u00e8re (magnifique) aurore bor\u00e9ale pour Thomas Pesquet<\/a><\/li>\n<li><a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2021\/01\/27\/en-suede-une-aurore-boreale-danse-derriere-un-halo-lunaire\/\" target=\"_blank\" rel=\"noopener\">En Su\u00e8de, une aurore bor\u00e9ale danse derri\u00e8re un halo lunaire<\/a><\/li>\n<\/ul>\n<p>Suivez l\u2019actualit\u00e9 astronomique et d\u00e9couvrez mes images du ciel en vous abonnant \u00e0 Cielmania sur\u00a0<a href=\"https:\/\/www.facebook.com\/cielmania\/\" target=\"_blank\" rel=\"noopener\">Facebook<\/a>.<\/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>Face \u00e0 la Terre, deux grands trous coronaux \u00e0 la surface du Soleil sont \u00e0 l&#8217;origine d&#8217;une s\u00e9rie de magnifiques aurores bor\u00e9ales. Que sont les trous coronaux ? Les champs magn\u00e9tiques \u00e0 la surface du\u00a0Soleil sont en g\u00e9n\u00e9ral des champs ferm\u00e9s. Ils sortent de la surface de notre \u00e9toile pour y rentrer un peu plus &hellip; <a href=\"https:\/\/blogs.futura-sciences.com\/feldmann\/2022\/09\/29\/soleil-deux-trous-coronaux-declenchent-de-belles-aurores\/\" class=\"more-link\">Continuer la lecture de <span class=\"screen-reader-text\">Soleil : deux trous coronaux d\u00e9clenchent de belles aurores<\/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":8,"featured_media":16594,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[86],"tags":[395,1420,97,1821],"class_list":["post-16593","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-soleil-et-planetes","tag-aurore-boreale","tag-petr-horalek","tag-soleil","tag-trou-coronal"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - 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