{"id":615,"date":"2024-05-15T22:32:34","date_gmt":"2024-05-15T20:32:34","guid":{"rendered":"http:\/\/astroenbaiedarmor.astrosurf.com\/?p=615"},"modified":"2024-06-15T09:31:44","modified_gmt":"2024-06-15T07:31:44","slug":"des-aurores-boreales-au-dessus-de-saint-brieuc","status":"publish","type":"post","link":"https:\/\/astroenbaiedarmor.astrosurf.com\/?p=615","title":{"rendered":"Des aurores bor\u00e9ales au dessus de Saint Brieuc !"},"content":{"rendered":"\n

La nuit du 10 au 11 mai 2024 a vu le ciel s’illuminer par de magnifiques aurores bor\u00e9ales en France mais aussi un peu partout dans monde (voir \u00e0 ce sujet la page du site spaceweather.com<\/em> du 11 mai : https:\/\/spaceweather.com\/archive.php?view=1&day=11&month=05&year=2024<\/a>).<\/p>\n\n\n\n

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\"\"\n\t\t\t\n\t\t\t\t\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n\n\n\n

Ces aurores sont la cons\u00e9quence de plusieurs \u00e9ruptions solaires (encore appel\u00e9es \u00e9jections de masse coronale – CME en anglais) provenant du gigantesque groupe de taches solaires AR3664 visible sur cette image prise le 8 mai 2024 par le satellite SDO-HMI. Ces \u00e9ruptions solaires projettent dans l’espace un flux de particules \u00e9lectris\u00e9es (protons et \u00e9lectrons) qui mettent 2 \u00e0 3 jours pour atteindre la Terre puis sont canalis\u00e9es par les lignes du champ magn\u00e9tique terrestre vers les r\u00e9gions polaires. Ces particules excitent et ionisent les atomes d’oxyg\u00e8ne et d’azote de la haute atmosph\u00e8re, provoquant ainsi les aurores polaires.<\/p>\n<\/div>\n\n\n\n

Gr\u00e2ce \u00e0 une alerte relay\u00e9e par Jacques sur le groupe WhatsApp d’ABA, plusieurs personnes ont pu observer ce ph\u00e9nom\u00e8ne au dessous de Saint Brieuc entre 00h30 et 1h00 (heure locale). Jean-Michel a r\u00e9alis\u00e9 les trois clich\u00e9s ci-dessus \u00e0 Langueux en utilisant son smartphone (iPhone 13) en mode automatique tenu \u00e0 la main sans tr\u00e9pied, Il est assez remarquable qu’une application photo standard sur smartphone puisse r\u00e9aliser d’aussi belle images.<\/p>\n\n\n\n

\"0h39<\/a>
0h39 heure locale, ISO 10000, ~3 sec de pose et la constellation de la Couronne Bor\u00e9ale en haut au centre.<\/figcaption><\/figure>\n\n\n\n
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0h45 heure locale, ISO 6400, ~3 sec de pose – d\u00e9grad\u00e9s de couleurs et train\u00e9es magnifiques.<\/figcaption><\/figure>\n\n\n\n
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0h47 heure locale, ISO 5000, ~3 sec de pose.<\/figcaption><\/figure>\n\n\n\n

Philippe Roux \u00e0 Lannion, de l’association Ciel d’Armor, a \u00e9galement observ\u00e9 et photographi\u00e9 ces aurores bor\u00e9ales. Un compte-rendu complet se trouve sur son blog<\/a> o\u00f9 il raconte comment il a \u00e9t\u00e9 alert\u00e9 et comment il a r\u00e9alis\u00e9 le time-lapse qu’il publie.<\/p>\n","protected":false},"excerpt":{"rendered":"

La nuit du 10 au 11 mai 2024 a vu le ciel s’illuminer par de magnifiques aurores bor\u00e9ales en France mais aussi un peu partout dans monde…<\/p>\n","protected":false},"author":1,"featured_media":647,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[6],"tags":[12],"class_list":["post-615","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-saison-2023-2024","tag-observations"],"jetpack_featured_media_url":"https:\/\/astroenbaiedarmor.astrosurf.com\/wp-content\/uploads\/2024\/05\/IMG_2621_bandeau_credit.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/astroenbaiedarmor.astrosurf.com\/index.php?rest_route=\/wp\/v2\/posts\/615","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/astroenbaiedarmor.astrosurf.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/astroenbaiedarmor.astrosurf.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/astroenbaiedarmor.astrosurf.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/astroenbaiedarmor.astrosurf.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=615"}],"version-history":[{"count":48,"href":"https:\/\/astroenbaiedarmor.astrosurf.com\/index.php?rest_route=\/wp\/v2\/posts\/615\/revisions"}],"predecessor-version":[{"id":784,"href":"https:\/\/astroenbaiedarmor.astrosurf.com\/index.php?rest_route=\/wp\/v2\/posts\/615\/revisions\/784"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/astroenbaiedarmor.astrosurf.com\/index.php?rest_route=\/wp\/v2\/media\/647"}],"wp:attachment":[{"href":"https:\/\/astroenbaiedarmor.astrosurf.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=615"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/astroenbaiedarmor.astrosurf.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=615"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/astroenbaiedarmor.astrosurf.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=615"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}