{"id":2526,"date":"2010-02-28T10:09:26","date_gmt":"2010-02-28T09:09:26","guid":{"rendered":"http:\/\/\/\/sitestory.dk\/wordpress\/?p=2526"},"modified":"2014-12-29T21:10:55","modified_gmt":"2014-12-29T20:10:55","slug":"jordskaelv-og-richterskalaen","status":"publish","type":"post","link":"https:\/\/sitestory.dk\/wordpress\/2010\/02\/28\/jordskaelv-og-richterskalaen\/","title":{"rendered":"Jordsk\u00e6lv og Richterskalaen"},"content":{"rendered":"<p><em>Der har v\u00e6ret flere alvorlige jordsk\u00e6lv p\u00e5 det sidste, men hvad betyder det egentlig, n\u00e5r man siger, at styrken var X p\u00e5 Richterskalaen?<\/em><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright size-full wp-image-2528\" title=\"Jorden\" src=\"http:\/\/\/\/sitestory.dk\/wordpress\/wp-content\/uploads\/2010\/02\/jorden.png\" alt=\"Jorden\" width=\"100\" height=\"99\" \/>Jeg vidste, at det var noget med, at Richterskalaen er logaritmisk, s\u00e5 at f.eks. 8 er mange gange kraftigere end 7. Men hvordan h\u00e6nger det egentlig sammen? Jeg slog det op.<\/p>\n<p>Hos <a title=\"Wikipedia om Richterskalaen\" href=\"http:\/\/en.wikipedia.org\/wiki\/Richter_magnitude_scale\" target=\"_blank\">Wikipedia<\/a> kan man l\u00e6se, at man ikke rigtigt bruger Richterskalaen mere, men noget der ligner meget: <a title=\"Wikipedia om momentmagnitude\" href=\"http:\/\/en.wikipedia.org\/wiki\/Moment_magnitude_scale\" target=\"_blank\">momentmagnituden<\/a>.<\/p>\n<p>Den er et udtryk for, hvor meget energi der udl\u00f8ses ved jordsk\u00e6lvet, og en forskel p\u00e5 1 svarer til en styrkeforskel p\u00e5 (10<sup>1<\/sup>)<sup>(3\/2)<\/sup> = 31,62. En forskel p\u00e5 2 svarer til (10<sup>2<\/sup>)<sup>(3\/2)<\/sup> = 1000 og s\u00e5 videre.<\/p>\n<p>Jordsk\u00e6lvet i Haiti den 12. januar m\u00e5lte 7, og g\u00e5rsdagens sk\u00e6lv i Chile m\u00e5lte 8,5. Alts\u00e5 en forskel p\u00e5 1,5. Jordsk\u00e6lvet i Chile udl\u00f8ste alts\u00e5 (10<sup>1,5<\/sup>)<sup>(3\/2)<\/sup> = 178 gange mere energi end det i Haiti.<\/p>\n<p>Hvis jordsk\u00e6lvet i Nords\u00f8en den 19. februar var p\u00e5 4,7, var sk\u00e6lvet i Chile alts\u00e5 501.187 gange kraftigere.<\/p>\n<p>Hvis jeg har forst\u00e5et det ret, er det alts\u00e5 ret vildt!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Der har v\u00e6ret flere alvorlige jordsk\u00e6lv p\u00e5 det sidste, men hvad betyder det egentlig, n\u00e5r man siger, at styrken var X p\u00e5 Richterskalaen? Jeg vidste, at det var noget med, at Richterskalaen er logaritmisk, s\u00e5 at f.eks. 8 er mange gange kraftigere end 7. Men hvordan h\u00e6nger det egentlig sammen? Jeg slog det op. Hos [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[463,952,1330,1679],"class_list":["post-2526","post","type-post","status-publish","format-standard","hentry","category-naturkrfter","tag-energi","tag-jordsklv","tag-momentmagnituden","tag-richterskalaen"],"_links":{"self":[{"href":"https:\/\/sitestory.dk\/wordpress\/wp-json\/wp\/v2\/posts\/2526","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sitestory.dk\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sitestory.dk\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sitestory.dk\/wordpress\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/sitestory.dk\/wordpress\/wp-json\/wp\/v2\/comments?post=2526"}],"version-history":[{"count":0,"href":"https:\/\/sitestory.dk\/wordpress\/wp-json\/wp\/v2\/posts\/2526\/revisions"}],"wp:attachment":[{"href":"https:\/\/sitestory.dk\/wordpress\/wp-json\/wp\/v2\/media?parent=2526"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sitestory.dk\/wordpress\/wp-json\/wp\/v2\/categories?post=2526"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sitestory.dk\/wordpress\/wp-json\/wp\/v2\/tags?post=2526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}