Ku zauna a yankin Seattle tsawon lokaci kuma za ku ji wani girgizar kasa. Yawancin girgizar asa a Arewa maso Yamma sun kasance ƙananan. Wasu kuma ba za ku ji ba. Sauran, kamar girgizar kasa ta kasa da kasa ta 2001, ya isa ya ji daɗi kuma ya haifar da lalacewa. Amma kada ku yi kuskure-yankin Seattle-Tacoma na da damar samun damuwa mai girma da hallakaswa!
Ƙungiyar Puget Sound ta ƙaura ne ta hanyar layi da yankuna kuma yana kusa da Cascadia Subduction Zone, inda ƙungiyar Juan de Fuca da Arewacin Amirka kectonic ke taruwa.
Bisa ga hukumar kula da albarkatun kasa na Washington, sama da 1,000 girgizar asa ya faru a jihar Washington a kowace shekara! Rayuwa a cikin wannan yanki na yanki, ba batun batun Seattle ba ne da babbar girgizar kasa , amma a lokacin da.
Irin Girgizar ƙasa a cikin Puget Sound
Dangane da yadda girgizar ƙasa ta kasance mai zurfi da kuma irin laifin da yake faruwa a kan, girgizar ƙasa na iya zama ƙananan ko manyan, kusa da farfajiya ko zurfi cikin ƙasa. Kamfanin Puget Sound yana da damar samun nau'o'in girgizar asa daban-daban: m, zurfin da ƙaddamarwa. Saukewa da zurfin rawar jiki ne kawai abin da suke yi kamar girgizar asa mai rairayi mai zurfi yana faruwa a tsakanin 0 zuwa 30 km daga farfajiyar; asawar girgizar ƙasa ta faru tsakanin 35 zuwa 70 km daga farfajiya.
Sauyewar girgizar ƙasa a yankinmu na faruwa ne a kan filin jirgin saman Cascadia na Washington Coast. Sakamakon shi ne lokacin da ɗayan takalma ke motsawa a karkashin wani nau'i kuma waɗannan sune girgizar kasa da ke da alaka da tsunamis da girman hawan.
Yankunan ƙaddamarwa (ciki har da Cascadia) suna iya samar da abin da ake kira megathrust girgizar asa, waxanda suke da iko sosai kuma suna lalacewa idan sun faru a cikin yanki. Yawan girgizar kasa ta Tohoku a kasar Japan ya faru a shekarar 2011 tare da wani sashi mai kama da Cascadia Subduction Zone.
Tarihin Girgizar Yankin Seattle
Ƙungiyar Puget Sound tana shaƙatawa ga ƙananan girgizar ƙasa da yawancin mutane basu ji ba kuma wannan baya haifar da lalacewa.
A cikin shekaru da yawa da suka wuce, wasu girgizar asa sun sanya tarihin tarihin girman su da kuma lalacewar da suka bar su.
Ranar 28 ga watan Fabrairu, 2001: Girgizar Kasa ta Nisent, a 6.8 mai girma, ta tsakiya ne a kudancin Nisqually, amma ya haifar da lalacewar tsari a Seattle.
29 ga Afrilu, 1965: Girman girgizar kasa mai zurfi 6.5 a yankin kudu maso Yamma ya ji kamar Montana da Birtaniya Columbia, kuma ya rushe dubban magoya baya a cikin Puget Sound.
13 ga Afrilu, 1949: An girgiza girgizar kasa 7.0 a kusa da Olympia kuma ta rasa rayuka takwas, dukiya da yawa a Olympia, da kuma babbar laka a Tacoma.
Fabrairu 14, 1946: Girma 6.3, girgizar kasa ta girgiza ta girgiza mafi yawan Puget Sound kuma ta haifar da babbar lalacewa a Seattle.
Yuni 23, 1946: Girgizar girgizar kasa ta 7.3 ta kasance a cikin Dutsen Georgia kuma ta haifar da lalacewa a Seattle. An ji girgizar kasa daga Bellingham zuwa Olympia.
1872: Tsakanin kusa da Lake Chelan , wannan girgizar kasa an kiyasta cewa ya kasance babba, amma akwai ƙananan halittu a jikinsa. Yawancin rahotanni a kan ragowar ƙasa da ƙurar ƙasa.
Janairu 26, 1700: Yankin da aka fi sani da girgizar kasa da ke kusa da Seattle ya kasance a cikin shekara ta 1700. Shaidar tsunami mai tsanani (wanda ko da ya buge Japan) da kuma lalata gandun daji na taimaka wa masana kimiyya kwanan wata girgizar kasa.
Kimanin 900 AD: An kiyasta cewa girgizar kasa mai girma 7.4 ta sami yankin Seattle a kimanin 900. Tarihin gida da kuma geology taimaka tabbatar da wannan girgizar kasa.