Hlala kwindawo yase Seattle ngokwaneleyo kwaye uya kuvela inyikima. Ininzi inyikima eNtshona-ntshonalanga yincinci. Abanye unokuba uvakalelwa. Abanye, njenge-Earthquake ye-Nisqually 2001, baninzi ngokwaneleyo ukuba bazive kwaye bangela umonakalo othile. Kodwa musa ukwenza iphutha-indawo yase Seattle-Tacoma inokukwazi ukuba neentlanzi ezinkulu kunye nezonakalisayo!
Ummandla we-Puget Sound uhluthelwa yimigca ephosakeleyo kunye nemimandla kwaye ikwafumaneka kufuphi neCascadia Subtion Zone, apho iJuan de Fuca kunye namacwecwe aseTurkey aseNorth America ahlangana ngayo.
Ngokutsho kwisebe laseWashington iSebe lezoLondolozo lweNdalo, iimveliso ezininzi ezingaphezu kwe-1 000 zenzeka eWashington ngonyaka ngamnye! Ukuhlala kwindawo enomsebenzi onjalo, akuyona into yokuba iT Seattle inyikima enkulu , kodwa nini.
Iintlobo zeNyikima-mhlaba kwiPuget Sound
Ngokuxhomekeka kwindlela enkulu inyikima kwaye uhlobo lwenkohlakalo lwenzeka kuyo, iinyikima ezinokuthi zincinci okanye zikhulu, kufuphi nomhlaba okanye ubunzulu ngaphakathi komhlaba. I-Puget Sound inokukwazi ukufumana iintlobo ezintathu zeentlanzi: ezahlukeneyo, ezinzulu kunye nokuxhaswa. Izityikitya ezingenanto kunye nezobunzulu zizinto ezivakalayo ezinjengotyikitya-nyikima ezenzekayo phakathi kwe-0 no-30 km ukusuka phezulu; iinyikima ezinzulu zenzeka phakathi kwama-35 no-70 km ukusuka phezulu.
Izityikima ezithintelayo kummandla wethu zenzeke kwi-Cascadia Subtion Zone ngaphandle kweWashington Coast. Ukutshintshwa kweso sihlandlo esinye sihamba ngaphantsi kwelinye iplati kwaye ezi ziyi-quakes zilawulwa kakhulu ngama-tsunami kunye namanqanaba amakhulu.
Iindawo ezincinci (kuquka iCascadia) ziyakwazi ukuvelisa izinto ezibizwa ngokuba yihlabathi i-megathrust, ezinamandla kwaye ziwonakalisa xa zenzeka kwindawo ehlala kuyo. Inyikima ye-Tohoku ka-2011 yaseJapan yenzeke kunye nommandla woqhagamshelwano olufana neCascadia Subtion Zone.
History of Earthquake History
Indawo ye-Puget Sound isoloko ixhomekeka kwiinkwenkwezi ezincinci abantu abaninzi abaziva ngayo kwaye akukho nto ibangela umonakalo.
Kwiminyaka emakhulu edlulileyo, iminyaka emininzi inyikima yenze iimbali zamanani azo aphezulu kunye nemonakalo esele ivukile.
NgoFebruwari 28, 2001: Ukuzamazama komhlaba komhlaba, kwi-6.8 ubukhulu, bekusezantsi kusezantsi, kodwa kubangele ukulimala kwindlela yonke eSttletle.
Ngo-Apreli 29, 1965: I-6.5 ubukhulu, inyikima enyikima eningizimu kwimvelaphi ye-Sound yayimvakalelwa kude njengaseMontana naseBrithani Columbia, kwaye yachithwa ngamawaka eenkukuma kwi-Puget Sound.
Ngo-Apreli 13, 1949: Ingqungquthela ye-7.0 yayisondele kufuphi neOlimia kwaye yabangela ukufa kwabasi-8, umonakalo omkhulu kwipropati e-Olympia, kunye ne-mudslide enkulu eTacoma.
NgoFebhuwari 14, 1946: Ubungakanani be-6.3, ukuzamazama komhlaba okunyikima kuninzi kuninzi ku-Puget Sound kwaye kwabangela umonakalo omkhulu eS Seattle.
NgoJuni 23, 1946: Ingqungquthela yokuphakama kwama-7.3 yayisisitratweni sase-Georgia kwaye yabangela umonakalo eS Seattle. Inyikima yavelelwa eBellingham ukuya eOlimia.
1872: Eyona ndawo kufuphi neLake Chelan , le nyikima inqikelelwa ukuba yayinkulu, kodwa kwakukho izakhiwo ezimbalwa zabantu. Uninzi lweengxelo zesikhungo malunga neeplaslides kunye ne-fissures yomhlaba.
NgoJanuwari 26, 1700: Inyikima yokugqibela ye-megathrust kufuphi neSeattle yayineminyaka eyi-1700. Ubungqina be-tsunami enkulu (mhlawumbi eye yabetha eJapane) kunye nokutshatyalaliswa kwamahlathi kunceda oososayensi bavele kule ntshukumo.
Phantse ku-900 AD: Kuqikelelwa ukuba inyikima yamanzi engama-7.4 ihlasela indawo ye-Seattle malunga ne-900.