{"id":554,"date":"2013-12-06T10:12:00","date_gmt":"2013-12-06T09:12:00","guid":{"rendered":"https:\/\/kids.esa.int\/huge_earthquake_changed_earth_s_gravity\/"},"modified":"2026-10-08T00:29:34","modified_gmt":"2026-10-07T22:29:34","slug":"huge_earthquake_changed_earth_s_gravity","status":"publish","type":"post","link":"https:\/\/kids.esa.int\/sv\/huge_earthquake_changed_earth_s_gravity\/","title":{"rendered":"En kraftig jordb\u00e4vning f\u00f6r\u00e4ndrade jordens gravitation"},"content":{"rendered":"<div class=\"lede\">\n<p>Trots att ESA:s GOCE-satellit brann upp vid \u00e5terintr\u00e4det i jordens atmosf\u00e4r f\u00f6r n\u00e5gra veckor sedan forts\u00e4tter detta unika uppdrag att bjuda p\u00e5 \u00f6verraskningar. Den senaste ov\u00e4ntade uppt\u00e4ckten \u00e4r att GOCE uppt\u00e4ckte en markant f\u00f6r\u00e4ndring i den lokala gravitationsstyrkan efter den kraftiga jordb\u00e4vningen som drabbade Japan 2011.<\/p>\n<\/div>\n<p>GOCE, som har formen av en pilspets, konstruerades s\u00e4rskilt f\u00f6r att skapa den mest detaljerade och exakta kartan \u00f6ver variationerna i jordens gravitationsf\u00e4lt som n\u00e5gonsin har tagits fram. N\u00e4r den fl\u00f6g l\u00e4ngs en n\u00e4stan pol\u00e4r bana p\u00e5verkades den str\u00f6mlinjeformade satellitens bana n\u00e5got av f\u00f6r\u00e4ndringar i jordens gravitationskraft.<\/p>\n<p>En noggrann analys av de data som GOCE skickade tillbaka under sitt fyra\u00e5riga uppdrag har gjort det m\u00f6jligt f\u00f6r forskarna att ta fram en anm\u00e4rkningsv\u00e4rt exakt modell (kallad \u2018geoiden\u2019) av jordens gravitation. Gradiometerinstrumentets enast\u00e5ende k\u00e4nslighet har dock \u00e4ven gjort det m\u00f6jligt att studera andra egenskaper hos v\u00e5r planet, s\u00e5som havsstr\u00f6mmar, f\u00f6r\u00e4ndringar i havsniv\u00e5n, landytans h\u00f6jd och skikten i jordskorpan. Den har till och med uppt\u00e4ckt vindar i rymden och ljudv\u00e5gor som spred sig upp genom atmosf\u00e4ren efter den stora jordb\u00e4vningen i Japan den 11 mars 2011.<\/p>\n<figure class=\"wp-block-image size-large\" data-width=\"4446\" data-credit=\"DGFI\/TU Delft\" data-detail-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2013\/12\/Gravity_scar_over_Japan2\" data-licence=\"ESA Standard Licence\" data-licence-url=\"https:\/\/www.esa.int\/ESA_Multimedia\/Terms_and_conditions_of_use_of_images_and_videos_available_on_the_esa_website\"><img decoding=\"async\" loading=\"lazy\" style=\"max-width:100%;height:auto\" src=\"https:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/images\/2013\/12\/gravity_scar_over_japan2\/17911676-2-eng-GB\/Gravity_scar_over_Japan.jpg\" alt=\"Gravity scar over Japan\"><figcaption>Gravitationens skugga \u00f6ver Japan<\/figcaption><\/figure>\n<p>Nu har GOCE \u00e5terigen \u00f6verraskat alla genom att uppt\u00e4cka f\u00f6r\u00e4ndringar i det lokala gravitationsf\u00e4ltet efter samma jordb\u00e4vning med magnitud 9 som \u00f6delade stora delar av Japan. Tyska och nederl\u00e4ndska forskare har analyserat GOCE-resultaten och uppt\u00e4ckt att jordb\u00e4vningen tydligt f\u00f6r\u00e4ndrade gravitationens styrka p\u00e5 \u00f6n Honshu och p\u00e5 den n\u00e4rliggande havsbotten. Detta \u00e4r f\u00f6rsta g\u00e5ngen som GOCE-data har visat p\u00e5 f\u00f6r\u00e4ndringar \u00f6ver tid.<\/p>\n<p>Dessutom skiljer sig storleken och placeringen av de gravitationsf\u00f6r\u00e4ndringar som m\u00e4tts av GOCE fr\u00e5n prognoserna. Genom att kombinera GOCE-data med information fr\u00e5n den tysk-amerikanska GRACE-expeditionen och andra k\u00e4llor kommer forskarna att f\u00e5 en betydligt mer exakt bild av vad som h\u00e4nde under undervattensjordb\u00e4vningen.<\/p>","protected":false},"excerpt":{"rendered":"<p>Although ESA\u2019s GOCE satellite burned up during re-entry into Earth\u2019s atmosphere a few weeks ago, this unique mission keeps on springing surprises. The latest unexpected discovery is that GOCE detected [&hellip;]<\/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\/2013\/12\/goce\/17888098-2-eng-GB\/GOCE.jpg","esa_banner_description":"GOCE","esa_banner_credit":"ESA \/AOES Medialab","esa_banner_licence":"ESA Standard Licence","esa_banner_detail_url":"https:\/\/www.esa.int\/ESA_Multimedia\/Images\/2013\/12\/GOCE","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":[],"panel":[],"language":[],"age":[],"duration":[],"resource_type":[],"audience":[],"wf_post_folders":[],"class_list":["post-554","post","type-post","status-publish","format-standard","hentry","category-earth","category-learn","category-natural-disasters"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/554","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=554"}],"version-history":[{"count":4,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/554\/revisions"}],"predecessor-version":[{"id":4546,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/posts\/554\/revisions\/4546"}],"wp:attachment":[{"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/media?parent=554"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/categories?post=554"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/tags?post=554"},{"taxonomy":"panel","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/panel?post=554"},{"taxonomy":"language","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/language?post=554"},{"taxonomy":"age","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/age?post=554"},{"taxonomy":"duration","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/duration?post=554"},{"taxonomy":"resource_type","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/resource_type?post=554"},{"taxonomy":"audience","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/audience?post=554"},{"taxonomy":"wf_post_folders","embeddable":true,"href":"https:\/\/kids.esa.int\/sv\/wp-json\/wp\/v2\/wf_post_folders?post=554"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}