Bilim insanlar\u0131, Pasifik Kuzeybat\u0131s\u0131’ndaki Puget Sound b\u00f6lgesinde yakla\u015f\u0131k 1.100 y\u0131l \u00f6nce ger\u00e7ekle\u015fmi\u015f olabilecek devasa bir deprem\u2014ya da k\u0131sa s\u00fcrede iki deprem\u2014kan\u0131t\u0131n\u0131 ortaya \u00e7\u0131kard\u0131lar. Science Advances dergisinde yay\u0131mlanan \u00e7al\u0131\u015fma, a\u011fa\u00e7 halkas\u0131 tarihleme y\u00f6ntemini kullanarak Seattle yak\u0131nlar\u0131ndaki iki fay hatt\u0131n\u0131n 923 ve 924 C.E. y\u0131llar\u0131 aras\u0131nda alt\u0131 ayl\u0131k bir s\u00fcrede k\u0131r\u0131ld\u0131\u011f\u0131n\u0131 belirledi.<\/p>\n\n
Bu ke\u015fif, b\u00f6lgenin daha k\u00fc\u00e7\u00fck depremlere e\u011filimli oldu\u011funu g\u00f6steren \u00f6nceki ara\u015ft\u0131rmalara meydan okuyor. Yeni bulgular, Seattle, Tacoma ve Olympia, Washington’u kapsayan b\u00f6lgenin, daha \u00f6nce d\u00fc\u015f\u00fcn\u00fcld\u00fc\u011f\u00fcnden daha \u015fiddetli depremler ya\u015fayabilece\u011fini g\u00f6steriyor.<\/p>\n\n
Birden fazla fay hatt\u0131n\u0131n ayn\u0131 anda k\u0131r\u0131lmas\u0131, bir b\u00f6lgenin ya\u015fayabilece\u011fi en y\u0131k\u0131c\u0131 deprem t\u00fcrlerinden biridir. Ancak bu t\u00fcr depremler nadir g\u00f6r\u00fcl\u00fcr ve tarihsel kay\u0131tlarda tespit edilmesi zordur. Yeni \u00e7al\u0131\u015fmada tan\u0131mlanan deprem, muhtemelen \u00e7oklu fay k\u0131r\u0131lmas\u0131 sonucu ger\u00e7ekle\u015fmi\u015f, bu da onu \u00f6zellikle tehlikeli k\u0131lm\u0131\u015ft\u0131r.<\/p>\n\n
Antik depremin zaman\u0131n\u0131 belirlemek i\u00e7in ara\u015ft\u0131rmac\u0131lar, Puget Sound \u00e7evresindeki alt\u0131 farkl\u0131 noktadan Douglas Fir a\u011fa\u00e7 halkalar\u0131n\u0131 incelediler. A\u011fa\u00e7lar\u0131n halkalar\u0131n\u0131 birbirleriyle ve referans kronolojisiyle kar\u015f\u0131la\u015ft\u0131rarak, a\u011fa\u00e7lar\u0131n 923 Ekim ile 924 Mart aras\u0131nda \u00f6ld\u00fc\u011f\u00fcn\u00fc belirlediler. Bu sayede deprem(ler) alt\u0131 ayl\u0131k bir pencereye daralt\u0131ld\u0131.<\/p>\n\n
Bulgulara g\u00fcveni art\u0131rmak i\u00e7in ekip, tarihlemede yard\u0131mc\u0131 olan ay\u0131rt edici bir i\u015faret olan Miyake olay\u0131 i\u00e7in a\u011fa\u00e7 halkalar\u0131n\u0131 tarad\u0131. G\u00fcne\u015f patlamas\u0131 ya da bir y\u0131ld\u0131z patlamas\u0131 olabilecek bu olay, a\u011fa\u00e7larda karbon-14 konsantrasyonunda belirgin bir art\u0131\u015f b\u0131rakm\u0131\u015ft\u0131r. 774\u2011775 C.E. y\u0131llar\u0131 aras\u0131ndaki bu olay\u0131 tespit edip referans noktas\u0131 olarak kulland\u0131lar; bu da \u00f6rneklenen b\u00f6lgelerdeki son a\u011fa\u00e7 halkas\u0131n\u0131n 923 C.E. oldu\u011funu do\u011frulad\u0131.<\/p>\n\n
Sonu\u00e7lara dayanarak ara\u015ft\u0131rmac\u0131lar, alt\u0131 ayl\u0131k s\u00fcre i\u00e7inde ya 7,5 ve 7,3 b\u00fcy\u00fckl\u00fc\u011f\u00fcnde iki yak\u0131n zamanl\u0131 deprem ya da yakla\u015f\u0131k 7,8 b\u00fcy\u00fckl\u00fc\u011f\u00fcnde tek bir \u00e7ok fayl\u0131 deprem ger\u00e7ekle\u015fmi\u015f olabilece\u011fini tahmin ediyor. Tek deprem senaryosu, iki ayr\u0131 deprem senaryosundan \u00fc\u00e7 kat daha olas\u0131.<\/p>\n\n
7,8 b\u00fcy\u00fckl\u00fc\u011f\u00fcndeki bir deprem, \u00f6nceki tehlike modellerinin temelini olu\u015fturan 6,7 b\u00fcy\u00fckl\u00fc\u011f\u00fcndeki bir depreme g\u00f6re 38 kat daha fazla enerji a\u00e7\u0131\u011fa \u00e7\u0131kar\u0131r. Bu, yayg\u0131n y\u0131k\u0131m ve can kayb\u0131n\u0131n yan\u0131 s\u0131ra yerel bir tsunamiye de yol a\u00e7abilir.<\/p>\n\n
\u00c7al\u0131\u015fman\u0131n bulgular\u0131, bu b\u00fcy\u00fckl\u00fckteki depremlerin olas\u0131l\u0131\u011f\u0131n\u0131 hesaba katmak i\u00e7in tehlike modellerinin g\u00fcncellenmesi gerekti\u011fini vurguluyor. Mevcut modeller bu kadar g\u00fc\u00e7l\u00fc depremleri g\u00f6z \u00f6n\u00fcnde bulundurmad\u0131\u011f\u0131ndan, potansiyel risklerin d\u00fc\u015f\u00fck tahmin edilmesi ve afet haz\u0131rl\u0131klar\u0131n\u0131n yetersiz kalmas\u0131 s\u00f6z konusu olabilir.<\/p>\n\n
Bu kadar a\u015f\u0131r\u0131 bir olay\u0131n belirli bir y\u0131lda ger\u00e7ekle\u015fme ihtimali d\u00fc\u015f\u00fck olsa da, \u00e7al\u0131\u015fma felaket boyutundaki depremlere haz\u0131rl\u0131kl\u0131 olman\u0131n \u00f6nemini ortaya koyuyor. Bina kodlar\u0131 ve acil m\u00fcdahale planlar\u0131, daha b\u00fcy\u00fck depremler olas\u0131l\u0131\u011f\u0131 g\u00f6z \u00f6n\u00fcne al\u0131narak g\u00f6zden ge\u00e7irilmeli ve g\u00fcncellenmelidir.<\/p>\n\n
Yeni \u00e7al\u0131\u015fmada tan\u0131mlanan deprem, son 16.000 y\u0131l\u0131n en \u015fiddetlisi olarak de\u011ferlendiriliyor. Bu, Pasifik Kuzeybat\u0131s\u0131’ndaki deprem risklerini daha iyi anlamak ve etkili azaltma stratejileri geli\u015ftirmek i\u00e7in devam eden ara\u015ft\u0131rma ve izleme \u00e7al\u0131\u015fmalar\u0131n\u0131n \u00f6nemini bir kez daha ortaya koyuyor.<\/p>","protected":false},"excerpt":{"rendered":"
1.100 Y\u0131l \u00d6nce Pasifik Kuzeybat\u0131s\u0131’n\u0131 Vurmu\u015f Olabilecek Devasa \u0130ki Fayl\u0131 Deprem Yeni \u00c7al\u0131\u015fma Antik Deprem \u015eiddetini Ortaya \u00c7\u0131kar\u0131yor Bilim insanlar\u0131, Pasifik Kuzeybat\u0131s\u0131’ndaki Puget Sound b\u00f6lgesinde yakla\u015f\u0131k 1.100 y\u0131l \u00f6nce ger\u00e7ekle\u015fmi\u015f…<\/p>\n","protected":false},"author":2,"featured_media":25395,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[728],"tags":[6748,613,4866,1643,19690,19691,8053],"class_list":["post-14684","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-earth-sciences","tag-tree-rings","tag-scientific-discovery","tag-earthquakes","tag-ancient-history","tag-fault-zones","tag-hazard-mitigation","tag-pacific-northwest"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/posts\/14684","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/comments?post=14684"}],"version-history":[{"count":2,"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/posts\/14684\/revisions"}],"predecessor-version":[{"id":25396,"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/posts\/14684\/revisions\/25396"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/media\/25395"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/media?parent=14684"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/categories?post=14684"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/tr\/wp-json\/wp\/v2\/tags?post=14684"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}