{"id":933,"date":"2004-12-03T10:14:00","date_gmt":"2004-12-03T09:14:00","guid":{"rendered":"https:\/\/kids.esa.int\/volcanoes\/"},"modified":"2026-10-08T00:33:56","modified_gmt":"2026-10-07T22:33:56","slug":"volcanoes","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/volcanoes\/","title":{"rendered":"Vulkaner"},"content":{"rendered":"
\n

Det finns cirka 1 500 aktiva vulkaner, varav ungef\u00e4r 50 f\u00e5r utbrott varje \u00e5r. De flesta av dessa vulkaner ligger runt Stilla havet \u2013 ett b\u00e4lte som kallas Stillahavets \u201celdring\u201d. Europa har sina egna vulkaner, s\u00e5som Etna och Vesuvius, som har haft utbrott m\u00e5nga g\u00e5nger genom historien.<\/p>\n<\/div>\n

Minst 500 miljoner m\u00e4nniskor bor i n\u00e4rheten av en aktiv vulkan. N\u00e4r ett utbrott intr\u00e4ffar kan omr\u00e5dena i n\u00e4rheten t\u00e4ckas av aska och gl\u00f6dhet lava.<\/p>\n

\u00c5krar och byggnader kan komma att begravas. Giftiga gaser, moln av gl\u00f6dande aska eller lerstr\u00f6mmar kan d\u00f6da alla som befinner sig i deras v\u00e4g. Lyckligtvis hj\u00e4lper satelliter numera till att identifiera de farligaste vulkanerna.<\/p>\n

\"Sicily's
Etna p\u00e5 Sicilien i b\u00f6rjan av november<\/figcaption><\/figure>\n

ESA:s satelliter Envisat och ERS-2 studerar vulkaner p\u00e5 m\u00e5nga olika s\u00e4tt. Kameror avbildar lavafl\u00f6den och askmoln. Infrar\u00f6da instrument uppt\u00e4cker het lava som stiger upp till ytan.<\/p>\n

Med hj\u00e4lp av radar kan man observera hur en vulkan \u201candas\u201d n\u00e4r sm\u00e4lt sten r\u00f6r sig inuti den. En upph\u00f6jning av ytan p\u00e5 bara n\u00e5gra millimeter kan avsl\u00f6ja att trycket \u00f6kar inf\u00f6r ett utbrott. Andra sensorer identifierar de gaser och partiklar som sl\u00e4pps ut i luften.<\/p>\n

S\u00e5dana uppgifter r\u00e4ddar liv och bidrar till att f\u00f6ruts\u00e4ga n\u00e4r n\u00e4sta utbrott kommer att intr\u00e4ffa. Satellitkartor \u00f6ver de drabbade omr\u00e5dena underl\u00e4ttar ocks\u00e5 r\u00e4ddnings- och \u00e5teruppbyggnadsarbetet.<\/p>","protected":false},"excerpt":{"rendered":"

There are about 1,500 active volcanoes, with 50 or so erupting each year. Most of these volcanoes are found around the Pacific Ocean \u2013 a belt known as the Pacific […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"esa_banner_image":"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2002\/12\/etna_-_real_image_1_-_december_20022\/17864232-3-eng-GB\/Etna_-_real_image_1_-_december_2002.jpg","esa_banner_description":"Mount Etna","esa_banner_credit":"Courtesy of P.Chastanet","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2002\/12\/Etna_-_real_image_1_-_december_20022","esa_external_url":"","esa_external_new_window":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":true},"categories":[42,10,59],"tags":[2],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-933","post","type-post","status-publish","format-standard","hentry","category-earth","category-learn","category-natural-disasters","tag-background-article"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/933","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/comments?post=933"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/933\/revisions"}],"predecessor-version":[{"id":4745,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/933\/revisions\/4745"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=933"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=933"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=933"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=933"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=933"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=933"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=933"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=933"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=933"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=933"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}