Kungenzeka kanjani ukuba ukuzamazama komhlaba kwaseCascadia kwenzeke eminyakeni engu-50 ezayo futhi kuyoba kubi kangakanani?
Context:Umlando wokwakheka komhlaba wembula ukuthi "ukuzamazama komhlaba okukhulu" (okunesilinganiso esingu - 8 noma ngaphezulu) kwenzeka endaweni yaseCascadia cishe njalo ngemva kweminyaka engu - 500 ngokwesilinganiso, ngokuvamile kuhambisana nama - tsunami. Kunobufakazi bokuthi okungenani kunezenzakalo ezingu - 13 ezenzeka ngezikhathi eziphakathi kweminyaka engaba ngu - 300 kuya kwengu - 900 ngokwesilinganiso seminyaka engu - 570 kuya ku - 590. Ukuzamazama komhlaba kwangaphambilini kulinganiselwa ukuthi kwaba ngo-AD 1310, AD 810, AD 400, 170 BC no-600 BC. [ citation kudingeka ]  Imithombo yokuzamazama komhlaba yaseCascadia  Njengoba kubonisiwe ekuzamazameni komhlaba kuka-1700, ukuzamazama komhlaba kwe-Indian Ocean ngo-2004, nokuzamazama komhlaba kweTōhoku ngo-2011 kanye ne-tsunami, ukuzamazama komhlaba kwendawo engaphansi komhlaba kungadala ama-tsunami amakhulu, futhi izindawo eziningi ezisogwini esifundeni zilungiselele izinhlelo zokukhishwa kwe-tsunami ngokulindela ukuzamazama komhlaba okungenzeka kweCascadia esikhathini esizayo. Nokho, amadolobha amakhulu aseduze, ikakhulukazi iSeattle, iPortland, iVancouver, iVictoria, neTacoma, atholakala emizileni yamanzi engaphakathi kwezwe kunasemaphethelweni ogwini, ayovikeleka emthwalweni omkhulu we-tsunami. La madolobha anezakhiwo eziningi ezisengozini, ikakhulukazi amabhuloho nezakhiwo zezitini ezingaqinisiwe; ngenxa yalokho, umonakalo omkhulu emadolobheni cishe wawuyoba ngenxa yokuzamazama komhlaba ngokwako. Esinye isazi sithi izakhiwo zaseSeattle azifaneleki ngisho nokumelana nesehlakalo esinjengokuzamazama komhlaba kwaseSan Francisco ngo - 1906, ingasaphathwa eyokuzamazama komhlaba okunamandla.  UKenneth Murphy, oqondisa i-FEMA's Region X, isigaba esiphethe i-Oregon, iWashington, i-Idaho, ne-Alaska, wakubeka ngokucacile: "Sicabanga ukuthi yonke into esentshonalanga ye-Interstate 5 iyoba yize".  Okutholakele muva nje kuphetha ngokuthi indawo ye-Cascadia subduction iyinkimbinkimbi futhi iyashintsha-shintsha kunalokho obekucatshangwa ngaphambili. Ngo-2010, izazi zokwakheka komhlaba zabikezela ukuthi kunamathuba angama-37% okuthi kwenzeke umcimbi we-M8.2 + kungakapheli iminyaka engama-50, kanye namathuba ayi-10 kuya kwangu-15% okuthi yonke indawo engaphansi kweCascadia izophuka ngomcimbi we-M9 + ngesikhathi esifanayo. Izazi zokuma komhlaba ziye zathola nokuthi iPacific Northwest ayilungele ukuzamazama komhlaba okukhulu kangako. I-tsunami eyenzekayo yayingafinyelela ukuphakama kwamamitha angu - 24 kuya kwangu - 30.  Ucwaningo lwango-2004 lwembula ukuthi kungenzeka ukuthi izinga lolwandle likhuphuke (ngenxa yokwehla) eduze nendawo yokwehla kweCascadia. Lithi amadolobha asogwini olusentshonalanga yeVancouver Island, njengeTofino neUcluelet, asengozini yokucwila okungamamitha angu-1<unk>2, uma kuqhathaniswa nezinga lolwandle eliphakathi.
Izazi zokuma komhlaba zibikezela ukuthi kunamathuba angu-37% okuzamazama komhlaba okungu-8.2+ okubangelwe ukuntengantenga kwepuleti laseCascadia eminyakeni engu-38 ezayo, kanye no-10% - 15% wokuzamazama komhlaba okungu-9+ ngesikhathi esifanayo. Le mininingwane ivela ocwaningweni lwango-2010. Umthombo: https://web.archive.org/web/20100527090117/http://oregonstate.edu/ua/ncs/node/13426