{"id":79007,"date":"2026-04-25T12:15:37","date_gmt":"2026-04-25T12:15:37","guid":{"rendered":"https:\/\/www.africa-press.net\/gabon\/politique\/tempete-solaire-aurores-boreales-a-lhorizon"},"modified":"2026-04-25T12:15:37","modified_gmt":"2026-04-25T12:15:37","slug":"tempete-solaire-aurores-boreales-a-lhorizon","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/gabon\/toutes-les-actualites\/tempete-solaire-aurores-boreales-a-lhorizon","title":{"rendered":"Tempe\u0302te solaire: Aurores bore\u0301ales a\u0300 l&rsquo;horizon"},"content":{"rendered":"<p><span class=\"ap-article-header-tag\">           <strong>Africa-Press &#8211; Gabon. <\/strong>         <\/span>La Terre a e\u0301te\u0301 touche\u0301e lundi par une intense tempe\u0302te ge\u0301omagne\u0301tique qui pourrait persister jusque dans la nuit et apporter son lot d&rsquo;aurores bore\u0301ales, a annonce\u0301 une agence ame\u0301ricaine.<\/p>\n<p><b>Explosions de particules provenant du Soleil<\/b><\/p>\n<p>Des conditions correspondant a\u0300 une tempe\u0302te ge\u0301omagne\u0301tique de niveau 4 sur une e\u0301chelle de 5 ont e\u0301te\u0301 observe\u0301es lundi a\u0300 partir de 15H00 GMT, selon un centre spe\u0301cialise\u0301 rattache\u0301 a\u0300 l&rsquo;Agence ame\u0301ricaine d&rsquo;observation oce\u0301anique et atmosphe\u0301rique (NOAA).<\/p>\n<p>Ces conditions \u00ab\u00a0pourraient persister jusqu&rsquo;a\u0300 ce soir\u00a0\u00bb, mais ne devraient pas augmenter davantage en intensite\u0301, a ajoute\u0301 NOAA dans un communique\u0301. Un tel e\u0301ve\u0301nement \u00ab\u00a0peut entrai\u0302ner l&rsquo;apparition d&rsquo;aurores le\u0301ge\u0300res jusqu&rsquo;en Alabama et dans le nord de la Californie\u00a0\u00bb, selon cette agence.<\/p>\n<p>Cette nouvelle tempe\u0302te solaire est provoque\u0301e par des e\u0301jections de masse coronale (CME), des explosions de particules partant du Soleil. Quand ces particules arrivent sur Terre, elles perturbent son champ magne\u0301tique.<\/p>\n<p>Dimanche, l&rsquo;astronaute de la Nasa Matthew Dominick avait de\u0301ja\u0300 publie\u0301 sur X des images d&rsquo;aurore bore\u0301ale prise depuis la Station spatiale internationale, ou\u0300 il se trouve actuellement.<\/p>\n<p>Timelapse of the moon setting into streams of red and green aurora followed by a sunrise lighting up Soyuz with a light blue.<\/p>\n<p>The aurora have been amazing the past few days. Great timing for trying out a new lens that recently arrived on Cygnus.<\/p>\n<p>15mm, T1.8, 1\/3s exposure,&#8230; pic.twitter.com\/otFv5pZ6vd<\/p>\n<p>\u2014 Matthew Dominick (@dominickmatthew) August 12, 2024<\/p>\n<p><b>Les effets inde\u0301sirables des tempe\u0302tes ge\u0301omagne\u0301tiques<\/b><\/p>\n<p>Mais les tempe\u0302tes ge\u0301omagne\u0301tiques peuvent aussi s&rsquo;accompagner d&rsquo;effets inde\u0301sirables. Elles peuvent par exemple de\u0301grader les communications a\u0300 haute fre\u0301quence, perturber les satellites, et entrai\u0302ner des surcharges sur le re\u0301seau e\u0301lectrique. Les ope\u0301rateurs d&rsquo;infrastructures sensibles ont e\u0301te\u0301 notifie\u0301s pour mettre en place des mesures visant a\u0300 limiter ces effets, a pre\u0301cise\u0301 NOAA.<\/p>\n<p>En mai 2024, la plane\u0300te avait connu les orages ge\u0301omagne\u0301tiques les plus puissants enregistre\u0301s depuis 20 ans. Ils avaient provoque\u0301 des aurores bore\u0301ales illuminant le ciel nocturne aux E\u0301tats-Unis, en Europe et Australie notamment, a\u0300 des latitudes beaucoup plus basses que d&rsquo;ordinaire.<\/p>\n<p>Ce type d&rsquo;e\u0301ve\u0301nement s&rsquo;est multiplie\u0301 re\u0301cemment, car le Soleil est actuellement proche de son pic d&rsquo;activite\u0301, selon un cycle qui revient tous les 11 ans.<\/p>\n<p class=\"ap-article-footer-note\">           Retrouvez plus d\u2019actualit\u00e9s et d\u2019analyses sur           <span class=\"ap-highlight-country\">Gabon<\/span>           sur le site           <span class=\"ap-highlight-brand\">Africa Press<\/span>         <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; Gabon. La Terre a e\u0301te\u0301 touche\u0301e lundi par une intense tempe\u0302te ge\u0301omagne\u0301tique qui pourrait persister jusque dans la nuit et apporter son lot d&rsquo;aurores bore\u0301ales, a annonce\u0301 une agence ame\u0301ricaine. Explosions de particules provenant du Soleil Des conditions correspondant a\u0300 une tempe\u0302te ge\u0301omagne\u0301tique de niveau 4 sur une e\u0301chelle de 5 ont e\u0301te\u0301 [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":79006,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,10],"tags":[49],"class_list":["post-79007","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-toutes-les-actualites","tag-gabon"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Tempe\u0302te solaire: Aurores bore\u0301ales a\u0300 l&#039;horizon - Gabon<\/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:\/\/www.africa-press.net\/gabon\/politique\/tempete-solaire-aurores-boreales-a-lhorizon\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tempe\u0302te solaire: Aurores bore\u0301ales a\u0300 l&#039;horizon\" \/>\n<meta property=\"og:description\" content=\"Africa-Press &#8211; Gabon. 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