{"id":66426,"date":"2026-04-25T19:51:08","date_gmt":"2026-04-25T19:51:08","guid":{"rendered":"https:\/\/www.europesays.com\/cz\/66426\/"},"modified":"2026-04-25T19:51:08","modified_gmt":"2026-04-25T19:51:08","slug":"obri-asteroid-zasahl-severni-more-vznikla-stometrova-tsunami","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/cz\/66426\/","title":{"rendered":"Ob\u0159\u00ed asteroid zas\u00e1hl Severn\u00ed mo\u0159e. Vznikla stometrov\u00e1 tsunami"},"content":{"rendered":"

V\u011bdci vy\u0159e\u0161ili desetiletou z\u00e1hadu gigantick\u00e9ho kr\u00e1teru Silverpit, kter\u00fd se nach\u00e1z\u00ed zhruba 700 metr\u016f pod hladinou Severn\u00edho mo\u0159e. Zp\u016fsobil ho siln\u00fd n\u00e1raz obrovsk\u00e9ho asteroidu p\u0159ed 43 a\u017e 46 miliony let. Silverpit tak pat\u0159\u00ed mezi zhruba 33 potvrzen\u00fdch mo\u0159sk\u00fdch impaktn\u00edch kr\u00e1ter\u016f roztrou\u0161en\u00fdch po dn\u011b sv\u011btov\u00e9ho oce\u00e1nu.<\/p>\n

Asteroid o rozm\u011brech p\u0159ibli\u017en\u011b 160 metr\u016f narazil <\/a>v obdob\u00ed st\u0159edn\u00edho eoc\u00e9nu hypersonickou rychlost\u00ed do m\u011blk\u00e9ho mo\u0159e. V m\u00edst\u011b dopadu se odpa\u0159ila voda i hornina. Do v\u00fd\u0161ky 1,5 kilometru byla vymr\u0161t\u011bna clona trosek a vodn\u00ed t\u0159\u00ed\u0161t\u011b. Kdy\u017e se tento v\u00ed\u0159\u00edc\u00ed sloup zhroutil, rozlil do okol\u00ed ob\u0159\u00ed vlnu tsunami. Ta musela dos\u00e1hnout v\u00fd\u0161ky p\u0159es 100 metr\u016f.<\/p>\n

Severn\u00ed mo\u0159e tehdy nebylo t\u00edm, jak ho zn\u00e1me dnes. Vlna ale musela zm\u011bnit tvar pob\u0159e\u017e\u00ed nap\u0159\u00ed\u010d starov\u011bkou p\u00e1nv\u00ed.<\/p>\n

Posledn\u00ed v\u011bta v dlouh\u00e9 diskusi<\/p>\n

Struktura pod tlustou vrstvou sedimentu byla dlouh\u00e1 desetilet\u00ed p\u0159edm\u011btem v\u00e1\u0161niv\u00fdch debat. Podle n\u011bkter\u00fdch n\u00e1zor\u016f \u0161lo o deformaci horniny zp\u016fsobenou pohybem soli nebo o posun mo\u0159sk\u00e9ho dna v d\u016fsledku sope\u010dn\u00e9 aktivity. V roce 2009 se dokonce skupina astronom\u016f otev\u0159en\u011b postavila proti my\u0161lence asteroidu.<\/p>\n

Nov\u00e1 seismick\u00e1 data tuto debatu uzav\u00edraj\u00ed<\/a>. Odhalila ostr\u00fd centr\u00e1ln\u00ed v\u00fd\u0161kov\u00fd bod, okoln\u00ed kruhov\u00fd p\u0159\u00edkop a \u0161irok\u00fd kruh rozpukan\u00e9 horniny. V okol\u00ed jsou rozprost\u0159eny men\u0161\u00ed sekund\u00e1rn\u00ed kr\u00e1tery. Dopad prob\u011bhl pod n\u00edzk\u00fdm \u00fahlem ze z\u00e1padu, ukazuj\u00ed zlomov\u00e9 vzory kolem okraje.<\/p>\n

Seismick\u00e9 skeny proveden\u00e9 v minulosti nazna\u010dovaly dopad asteroidu. A\u017e mikroskopick\u00e9 d\u016fkazy v miner\u00e1lech definitivn\u011b potvrdily, \u017ee jde o impaktn\u00ed kr\u00e1ter. \u0158e\u010d je o dvou objeven\u00fdch zrnech p\u00edsku s mikroskopick\u00fdmi stopami extr\u00e9mn\u00edho tlaku.<\/p>\n","protected":false},"excerpt":{"rendered":"V\u011bdci vy\u0159e\u0161ili desetiletou z\u00e1hadu gigantick\u00e9ho kr\u00e1teru Silverpit, kter\u00fd se nach\u00e1z\u00ed zhruba 700 metr\u016f pod hladinou Severn\u00edho mo\u0159e. Zp\u016fsobil…\n","protected":false},"author":2,"featured_media":66427,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[1541,2038,5392,2037,74,73,78,75,16905,77,76,6293],"class_list":{"0":"post-66426","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-veda-a-technika","8":"tag-asteroid","9":"tag-clanek","10":"tag-krater","11":"tag-nedd","12":"tag-science","13":"tag-science-technology","14":"tag-technika","15":"tag-technology","16":"tag-tsunami","17":"tag-veda","18":"tag-veda-a-technika","19":"tag-zeme"},"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@cz\/116467091547599336","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts\/66426","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/comments?post=66426"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts\/66426\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/media\/66427"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/media?parent=66426"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/categories?post=66426"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/tags?post=66426"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}