{"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\/da\/volcanoes\/","title":{"rendered":"Vulkaner"},"content":{"rendered":"
\n

Der findes omkring 1.500 aktive vulkaner, hvoraf omkring 50 g\u00e5r i udbrud hvert \u00e5r. De fleste af disse vulkaner ligger omkring Stillehavet \u2013 et b\u00e6lte, der kaldes Stillehavets \u201cIldring\u201d. Europa har sine egne vulkaner, s\u00e5som Etna og Vesuv, som har v\u00e6ret i udbrud mange gange gennem historien.<\/p>\n<\/div>\n

Mindst 500 millioner mennesker bor t\u00e6t p\u00e5 en aktiv vulkan. N\u00e5r der sker et udbrud, kan de omkringliggende omr\u00e5der blive d\u00e6kket af aske og gl\u00f8dende lava.<\/p>\n

Marker og bygninger kan blive begravet. Giftige gasser, skyer af gl\u00f8dende aske eller mudderskred kan dr\u00e6be alle, der befinder sig i deres vej. Heldigvis er satellitter nu med til at identificere de farligste vulkaner.<\/p>\n

\"Sicily's
Etna p\u00e5 Sicilien i begyndelsen af november<\/figcaption><\/figure>\n

ESA\u2019s satellitter Envisat og ERS-2 unders\u00f8ger vulkaner p\u00e5 mange forskellige m\u00e5der. Kameraer viser lavastr\u00f8mme og askeskyer. Infrar\u00f8de instrumenter registrerer varm lava, der stiger op til overfladen.<\/p>\n

Radar kan registrere en vulkans \u201c\u00e5ndedr\u00e6t\u201d, n\u00e5r smeltet magma bev\u00e6ger sig inde i den. En h\u00e6velse af overfladen p\u00e5 blot nogle f\u00e5 millimeter kan afsl\u00f8re, at der opbygges tryk f\u00f8r et udbrud. Andre sensorer identificerer de gasser og partikler, der frigives i luften.<\/p>\n

S\u00e5danne data redder liv og bidrager til at forudsige, hvorn\u00e5r det n\u00e6ste udbrud vil finde sted. Satellitkort over de ramte omr\u00e5der er ogs\u00e5 en hj\u00e6lp i forbindelse med rednings- og genopbygningsarbejdet.<\/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\/da\/wp-json\/wp\/v2\/posts\/933","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/comments?post=933"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/933\/revisions"}],"predecessor-version":[{"id":4745,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/posts\/933\/revisions\/4745"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/media?parent=933"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/categories?post=933"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/tags?post=933"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/panel?post=933"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/language?post=933"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/age?post=933"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/duration?post=933"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/resource_type?post=933"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/audience?post=933"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/da\/wp-json\/wp\/v2\/wf_post_folders?post=933"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}