{"id":2595,"date":"2025-09-23T06:20:09","date_gmt":"2025-09-23T06:20:09","guid":{"rendered":"https:\/\/www.europesays.com\/ee\/2595\/"},"modified":"2025-09-23T06:20:09","modified_gmt":"2025-09-23T06:20:09","slug":"pohjamerre-porutas-miljonite-aastate-eest-toesti-asteroid-ajalugu","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/ee\/2595\/","title":{"rendered":"P\u00f5hjamerre p\u00f5rutas miljonite aastate eest t\u00f5esti asteroid | Ajalugu"},"content":{"rendered":"

Kaali kraater l\u00f6\u00f6di Saaremaale umbes kolm ja pool tuhat aastat tagasi, Neugrundi kraater Osmussaare l\u00e4histel p\u00e4rineb enam kui poole miljardi aasta tagant.<\/p>\n

N\u00fc\u00fcd on teada, et nende kahe daatumi vahel, umbes 43 kuni 46 miljonit aastat tagasi tekkis asteroidi- v\u00f5i komeedil\u00f6\u00f6gist praeguse P\u00f5hjamere p\u00f5hja alla Silverpiti kraater.<\/p>\n

Inglismaa rannikult umbes Hulli v\u00f5i Scarborough kandist sadakond kilomeetrit itta j\u00e4\u00e4va Silverpiti kraatri tekkeloo \u00fcle on teadlased k\u00fcmneid aastaid v\u00e4idelnud, aga \u00d9isdean Nicholson \u0160otimaalt Edinburghist Herioti-Watti \u00dclikoolist ja ta kolleegid \u00dchendkuningriigist, Ameerika \u00dchendriikidest ja Saksamaalt on esitanud veenva t\u00f5endusmaterjali.<\/p>\n

<\/p>\n

Teadlased uurisid kraatrit seismokuvamisi, merep\u00f5hja-alustelt struktuuridelt tagasi kajanud helilainete j\u00e4rgi. See kolme aasta eest tehtud m\u00f5\u00f5tmist\u00f6\u00f6 oli ulatuslikem ja s\u00fcsteemseim, mis Silverpiti kraatri kohal eales tehtud.<\/p>\n

Lisaks \u00f5nnestus teadlastel kraatri l\u00e4hedase naftakaevu kaudu hankida kraatriga samalt s\u00fcgavuselt merep\u00f5hja alt kvartsi- ja p\u00e4evakivit\u00fckke, mille kristallv\u00f5re paistab olevat k\u00f5rge r\u00f5hu all moondunud.<\/p>\n

Just need \u00f5nnekombel leitud kivit\u00fckid annavad l\u00f5pliku kindluse, et kraater on t\u00f5esti tekkinud kosmilisest l\u00f6\u00f6gist.<\/p>\n

Nicholson ja kaasautorid kirjutavad ajakirjas Nature Communications<\/a>, et asjakohane asteroid oli umbes 160-meetrise l\u00e4bim\u00f5\u00f5duga ja saabus madala nurga all l\u00e4\u00e4nesuunalt.<\/p>\n

M\u00f5ne minutiga kerkis merest \u00fcles pooleteise kilomeetri k\u00f5rgune veest ja kividest ringvall, mille tagasi alla langedes l\u00e4ks liikvele enam kui saja meetri k\u00f5rgune tsunami.<\/p>\n

Sest katastroofist t\u00e4nap\u00e4evani j\u00e4rel olev kolme kilomeetrise l\u00e4bim\u00f5\u00f5duga Silverpiti kraater, mis asub umbes 700 meetri s\u00fcgavusel merep\u00f5hja all, avastati aastal 2002.<\/p>\n

Juba kohe algul arvati, et tegu on l\u00f6\u00f6gikraatriga, aga vahepeal hakati k\u00f5vasti kahtlustama, et v\u00f5ib-olla on kraater tekkinud uhte- v\u00f5i vulkanismin\u00e4htusena. \u00d5nneks on n\u00fc\u00fcd teaduslik t\u00f5de jalule seatud.<\/p>\n

Teadusuudised on Vikerraadios eetris esmasp\u00e4evast reedeni ca kell 8.35 ja laup\u00e4eval ca kell 8.25.<\/p>\n","protected":false},"excerpt":{"rendered":"Kaali kraater l\u00f6\u00f6di Saaremaale umbes kolm ja pool tuhat aastat tagasi, Neugrundi kraater Osmussaare l\u00e4histel p\u00e4rineb enam kui…\n","protected":false},"author":2,"featured_media":2596,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[80],"tags":[2564,26,27,37,33,35,34,36,31,32,21,2561,28,29,95,2562,19,2563,25,2565,23,24,22,20,30,92,93,94],"class_list":{"0":"post-2595","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-maailm","8":"tag-asteroidilook","9":"tag-breaking-news","10":"tag-breakingnews","11":"tag-ee","12":"tag-eesti","13":"tag-eesti-keel","14":"tag-estonia","15":"tag-estonian","16":"tag-featured-news","17":"tag-featurednews","18":"tag-headlines","19":"tag-kraater","20":"tag-latest-news","21":"tag-latestnews","22":"tag-maailm","23":"tag-merepohi","24":"tag-news","25":"tag-pohjameri","26":"tag-populaarseimad-lood","27":"tag-silverpiti-kraater","28":"tag-top-stories","29":"tag-topstories","30":"tag-uldised-uudised","31":"tag-uudised","32":"tag-viimased-uudised","33":"tag-world","34":"tag-world-news","35":"tag-worldnews"},"share_on_mastodon":{"url":"","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts\/2595","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/comments?post=2595"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/posts\/2595\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/media\/2596"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/media?parent=2595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/categories?post=2595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/ee\/wp-json\/wp\/v2\/tags?post=2595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}