{"id":7259,"date":"2022-11-03T01:05:34","date_gmt":"2022-11-02T19:35:34","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=7259"},"modified":"2025-03-28T19:09:46","modified_gmt":"2025-03-28T13:39:46","slug":"coronal-holes","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/coronal-holes\/","title":{"rendered":"Coronal Holes"},"content":{"rendered":"<h2><strong>About Coronal Holes:<\/strong><\/h2>\n<ul>\n<li>These are regions on the sun\u2019s surface from where fast solar wind gushes out into space. Because they contain little solar material, they have lower temperatures and thus appear much darker than their surroundings.<\/li>\n<li>Here, the magnetic field is open to interplanetary space, sending solar material out in a high-speed stream of solar wind.<\/li>\n<li>Coronal holes can last between a\u00a0<strong>few weeks to months.<\/strong><\/li>\n<li>The holes are not a unique phenomenon, appearing throughout the sun\u2019s approximately 11-year solar cycle.<\/li>\n<li>They can last much longer during solar minimum \u2013 a period of time when activity on the Sun is substantially diminished, according to NASA.<\/li>\n<\/ul>\n<h3><strong>Causes:<\/strong><\/h3>\n<ul>\n<li>While it is unclear what causes coronal holes, they correlate to areas on the sun where magnetic fields soar up and away, without looping back down to the surface as they do elsewhere.<\/li>\n<\/ul>\n<h3><strong>Impacts:<\/strong><\/h3>\n<ul>\n<li>These \u2018coronal holes\u2019 are important to understanding the space environment around the earth.<\/li>\n<li>Scientists study these fast solar wind streams because they sometimes interact with earth\u2019s magnetic field, creating what\u2019s called a\u00a0<strong>geomagnetic storm<\/strong>, which can expose satellites to radiation and interfere with communications signals.<\/li>\n<\/ul>\n<hr \/>\n<p><strong>Source :\u00a0<\/strong><a href=\"https:\/\/indianexpress.com\/article\/explained\/explained-sci-tech\/why-the-sun-was-smiling-in-an-image-shared-by-nasa-8243451\/\" target=\"_blank\" rel=\"nofollow noopener\">Indian Express<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The holes are not a unique phenomenon, appearing throughout the sun\u2019s approximately 11-year solar cycle.<\/p>\n","protected":false},"author":5,"featured_media":7260,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-7259","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/7259","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=7259"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/7259\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/7260"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=7259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=7259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=7259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}