Mfundo Zokondweretsa Ponena za Phiri la St Helens

01 ya 05

Chiyambi cha Phiri la St. Helens

Phiri la St. Helens ndi limodzi mwa mapiri ambirimbiri a mapiri a Pacific Northwest. Chimodzi mwa zomwe zimadziwika kuti Pacific Rim of Fire, Phiri la St. Helens limatchuka chifukwa cha ntchito yake yatsopano ndi yopitilira. Phiri la St. Helens pakati pa Mtsinje wa Cascade ku Washington, pafupi pakati pa Seattle ndi Portland.

Phiri lokhalo, pamodzi ndi malo ozungulirana azungulira, lasungidwa ngati Chipilala cha Phiri la Vol. Malo omwe ali mkati mwa chikumbutso akuloledwa kutenga njira yawo kuti ayambe kuchira, ndipo amapanga chidwi chophunzirira maphunziro kwa asayansi ndi anthu onse. Alendo ku Chikumbutso cha Phiri la Phiri la St. Helens adzapeza malo osiyanasiyana osangalatsa alendo komanso mawonedwe ochititsa chidwi ambiri.

Pafupifupi 1980 Kuphulika kwa phiri la St. Helens: Zochitika za Zochitika

Pafupifupi 1980 Kuphulika kwa phiri la St. Helens: Zovuta

Ntchito yatsopano ya Mount St. Helens

Phiri la St. Helens Ntchito Kupyolera mu Mbiri

02 ya 05

Pafupifupi 1980 Kuphulika kwa phiri la St. Helens: Zochitika za Zochitika

Phiri la St. Helens linaphulika pa 8:32 PST pa May 18, 1980, kukumbutsa Pacific Pacific Kumadzulo ndi anthu padziko lonse lapansi mphamvu zamphamvu ndi zosasinthasintha zachilengedwe. Zotsatira za kuphulika kwazomweku kunapezeka m'mayiko ambiri a US, ndi phulusa likugwa kutali monga Oklahoma. Pitani ku Phiri la St. Helens nokha kuti mudziwe zambiri za mbiri ya phirili komanso mmene zilili panopo.

Zotsatira za zochitika zomwe zinachitika pa phiri 18 la Mount St. Helens:

• Chivomezi cha 5.1-magnitude
• Mphepete mwa nyanja ndi madera oyandikana nawo kumpoto kwa phirili zikuthawa, motero pamakhala miyala yambiri, matope, ndi zinyalala zodzaza mamita 24
• Kutuluka kwa mpweya wochokera m'kati mwa chiphalaphalacho kunatulutsa phulusa ndi pumice

Zotsatira za zochitika zomwe zimatsogolera kuphulika: March - May, 1980

Zonsezi zinayamba pa March 15, 1980, pamene Phiri la St. Helens linayamba nthawi yochita masewera olimbitsa thupi. Pamene ntchitoyi inakula, phirili linasunga ife tonse pampando. Pano pali mfundo zazikulu zochitika zomwe zikutsogolera kuphulika kwakukulu kwa Mayi 18, mu nthawi yotsatizana.

May 17, 1980
Akuluakulu apolisi adathamangitsa anthu pafupifupi 50 katundu wa katundu ku Red Zone kuti atenge katundu.

May 7-13, 1980
Kuphulika kwakukulu kwa nthunzi ndi phulusa kumachokera ku phirili. Zivomezi zosadziwika mpaka kufika pa 4.9.

April 29, 1980
Akuluakulu a boma anapempha bwanamkubwa kuti atseke malo akuluakulu pafupi ndi phirili. Ndondomekoyi inkafuna Malo Ofiira (palibe mwayi wopezeka pagulu) ndi Blue Zone (zoletsedwa kupeza). Akuluakulu ogwira ntchito zam'tsogolo akukhumudwa chifukwa anthu akuwoneka kuti sakudziwa za ngozi.

March 27 mpaka April 18, 1980
Zivomezi ndi ziphuphu zothamangitsidwa ndi nthunzi zimachitika panthawiyi.

March 20, 1980
Chivomezi chachikulu cha 4.1, chosiyana ndi china chilichonse chomwe chinapezeka kale m'deralo, chinachitika kumpoto chakumadzulo kwa msonkhano wa Phiri la St. Helens. Ofufuza za Seismologists sankadziwa ngati zivomezizi zoyamba kapena zoyambirirazo zinali zokhudzana ndi zochitika zaphalaphala. Anaganiza zopereka seismometers zina kuti awone bwino ntchito yamtsogolo.

March 15-19, 1980
Zivomezi zing'onozing'ono zowerengeka zalembedwa, koma sizidziwika ngati zowonjezereka zowonongeka kwa mapiri.

Gwero la Deta: USGS / Cascades Obscatory Observatory. Onani tsambali kuti mumve zambiri.

03 a 05

Pafupifupi 1980 Kuphulika kwa phiri la St. Helens: Zovuta

Zotsatira za kuphulika kwa phiri la St. Helens mu 1980 zinaphatikizapo:

• Phiri la St. Helens linachepetsedwa ndi kutalika kwa mamita 1,300
• Phulusa la mphepo linaphulika mpaka makilomita 930 kutali
• Zotsambazo zimathamanga ndipo matope amalowa m'mphepete mwa chigwa cha Toutle mpaka mamita pafupifupi 50
• Kuphulika kwadutsa kwa maola 9
• Anthu 57 ataya miyoyo yawo, kapena adakalibe akusowa
• Malo okwana ma kilomita 250 anawonongeka
• "Zambiri" zinyama zinaphedwa - zowonongeka ndi zinyama zazikulu zokwana 7,000 ndi mbalame, nsomba, ndi zinyama zazikulu
• Kuphulika kwazing'ono kunapitirira mpaka mu 1986

Zolemba ndi ziwerengero zopezeka mu chidule cha USGS

04 ya 05

Ntchito yatsopano ya Mount St. Helens

Pamene tayamba kuganiza kuti phiri la St. Helens likukhazikika pansi, mapiri amphuphu kapena akuphulika. Pano pali mndandanda wa ntchito yaposachedwapa ya Mount St. Helens.

2005 kuti apereke
Phiri la St. Helens likupitirizabe kuchepa, kutaya kwa mpweya ndi mpweya wozizira, kuchepa kwa phulusa, ndi kukula kwa chiphala chatsopano cha chiphalala.

March 8, 2005
Kuphulika kwa phiri la St. St. Helens kunachitika pang'onopang'ono, ndipo mpweya wotentha ndi wa phulusa unkafika mamita pafupifupi 36,000 pamwamba pa nyanja.

January 16, 2005
Kuphulika kwaphalaphala komwe kunatambasula phulusa ndi miyala ikukulu ngati mita imodzi m'chiguduli ndi phulusa kummawa kumapiri a kum'mawa.

October 11, 2004 kuti apereke
Maluwa atsopano ndi osiyana omwe amadziwika bwino amadziwika; ikupitiriza kukula ndi kusintha.

October 5, 2004
Kuphulika kwakukulu kwa mpweya ndi phulusa kuyambira chiyambi cha chisokonezo. Icho chinatha ola limodzi. Phulusa linakwera pafupifupi mamita 3,700 (12,000 ft) ndipo linasunthira kumpoto chakumadzulo. Phulusa la Morton, Randle, ndi Packwood, pafupifupi makilomita 50 kutalika. Kutentha kwakukulu kunakhudza mbali ya kummawa kwa Phiri la National Rainier, mtunda wa 110 km (70 mi) kumpoto cha kumpoto chakum'mawa.

October 1, 2004
Kuphulika kwa mpweya wambiri, ndi phulusa laling'onoting'ono, lochokera kumphepo kumwera kwa 1980-86 lava dome

September 23-25, 2004
Phokoso la zivomezi zazing'ono zosazama (zochepa kuposa kukula kwa 1) zinayamba m'mawa pa September 23, zidafika masana pa September 24, ndipo zidakomoka madzulo a pa 25 September.

Gwero la Deta: USGS / Cascades Obscatory Observatory

05 ya 05

Phiri la St. Helens Ntchito Kupyolera mu Mbiri

Pamene mapiri amapita, phiri la St. Helens ndiloling'ono. Zakale zodziwika kwambiri zakale zaphalaphala zinayamba pafupifupi zaka 50 mpaka 40,000 zapitazo, ndipo kagawo kamene kanagwera mu 1980 ndi zaka 2200 zokha. Amwenye ena a Pacific Northwest omwe amadziwika kuti phiri la St. Helens "Louwala-Clough," kapena "phiri la kusuta." Dzina lamakono, Phiri la St. Helens, linaperekedwa pamwamba pa mapiri a 1792 ndi Captain George Vancouver wa British Royal Navy, woyendetsa nyanja komanso wofufuzira. Anayitcha kuti alemekeze munthu wina, Alleyne Fitzherbert, yemwe anali ndi dzina lakuti Baron St. Helens komanso amene anali ndi Ambassador wa ku Spain ku Spain. Vancouver imatchedwanso mapiri atatu kuphulika kwa Cascades - Mounts Baker, Hood, ndi Rainier - a British asilikali apolisi.

Nazi mfundo zazikulu za ntchito ya Phiri la Helens m'zaka 2000 zapitazo:

Nyengo Yopweteka Mbuzi

Pafupifupi 1800 AD
Nthawi yovuta imeneyi idatha zaka 100-150. Zochitika zotchuka zimaphatikizapo kuphulika kwa phulusa mu 1842, komwe kunatsatiridwa ndi extrusion ya Goat Rocks dome. Nkhani zamakono zimasonyeza ntchito kangapo m'zaka za 1840 ndi 1850, koma siziri zenizeni komanso zimatsutsana. Ntchito yomalizira isanayambe 1980 inali "utsi wambiri ndi moto" mu 1857, ngakhale kuti zochepa, zosatsimikizirika zinaphulika mu 1898, 1903, ndi 1921

Kalama Eruptive Period

1479 mpaka 1482 AD
Nthaŵi yovuta imeneyi inali ndi maulendo awiri akuluakulu a phulusa, komanso mapulaneti a lava ndi nyumba ya dome.

Nthawi Yopweteka ya Shuga Bowl

Pafupifupi 800 AD
Phiri la St. Helens linakonzedwanso ndi kuphatikiza nyumba yomanga dome, kuphulika kwa phokoso, komanso mapuloteni otuluka panthawiyi.

Nthawi Yowopsya ya Castle Creek

200 BC mpaka 300 AD
Ntchito yayikulu panthawiyi inali ndi phulusa la phulusa, pyroclastic flows, ndi lava ikuyenda.

Gwero la Deta: USGS / Cascades Obscatory Observatory: Phiri la St. Helens Yopseza Mbiri