Umsebenzi wamuva we-Volcanic
Ngesikhathi nje siqala ukucabanga iNtaba iSt. Helens ihlezi phansi, i-volcano events noma iyaqhuma. Nasi umugqa wesikhathi somsebenzi wamuva we-Mount St Helens.
2005 ukwethula
INtaba iSt. Helens iyaqhubeka ihlangabezana namanani aphansi okuma komhlaba, ukukhishwa okuphansi kwegesi kanye ne-volcanic gases, ukukhiqizwa okuncane komlotha, nokukhula kwe-lava dome entsha ngaphakathi kwe-crater.
Mashi 8, 2005
Intaba-mlilo yaseSt. Mount Helens yahlangabezana nomcimbi omncane wokuqhuma, kanti umkhumbi owenziwe ngamanzi-ash-ash ufika endaweni engamamitha angaba ngu-36 000 ngaphezu kolwandle.
NgoJanuwari 16, 2005
Ukuqhuma okuqhumayo okwehlukanisa umlotha nokugubha njengamamitha ayi-1 ku-crater nokuthunga empumalanga ngaseceleni kwempumalanga.
Ngo-Okthoba 11, 2004 ukwethula
I-lava yedome entsha nehlukile yacaca; iqhubeka ikhula futhi ishintshe.
Ngo-Okthoba 5, 2004
Ukuqhuma okukhulu kwe-steam-and-ash kusukela ekuqaleni kwezingxabano. Kwahlala ngaphezu kwehora elilodwa. Umlotha ovuthayo wafika cishe ku-3 700 m (12,000 ft) futhi waqhubekela ngasenyakatho-mpumalanga-mpumalanga. I-ash ash dusting yawela emadolobheni aseMorton, eRandle, nasePakwoodwood, cishe ngamakhilomitha angaba ngu-50. Ukuthungula okukhanyayo kwathinta uhlangothi lwempumalanga yeNtaba Rainier National Park, 110 km (70 mi) enyakatho-mpumalanga-mpumalanga.
Ngo-Okthoba 1, 2004
Ukuqhuma kwe-steam encane, nomlotha omncane, okhishwe ngehora elingeningizimu ye-1980-86 lava dome
September 23-25, 2004
Ukuzamazama komhlaba okuncane, okuncane kakhulu (okwedlula ubukhulu 1) kwaqala ekuseni kaSeptemba 23, kwafika phakathi nosuku ngoSepthemba 24, kwaze kwaba yilapho kuhlwe ntambama ka-Septhemba 25.
Umthombo Wedatha: USGS / Cascades Volcano Observatory
>> Imininingwane ka-1980 iSt. St Helens Umsebenzi
Konke kwaqala ngo-Mashi 15, 1980, lapho iNtaba iSt. Helens iqala isikhathi sokusebenza kwesimo sezulu esincane. Njengoba lo msebenzi wawukhuphuka, intaba-mlilo yayisigcina sonke esiphezulu kwezihlalo zethu. Nakhu okuvelele okuvela ezenzakalweni eziholela ekuqhumeni okukhulu kukaMeyi 18 , ngokulandelana kokulandelana okulandelanayo.
Ngo-May 17, 1980
Iziphathimandla zokuphoqelela umthetho zihambise imoto engaba ngu-50 yabanikazi bendawo kuLwandle Olubomvu ukuze lithole impahla.
NgoMeyi 7-13, 1980
Ukuqhuma okuncane kwe-steam nomlotha kukhishwa ku-volcano. Ukuzamazama komhlaba okungapheli kuze kube sezingeni eliphakeme 4.9.
Ngo-Ephreli 29, 1980
Izikhulu zikahulumeni zacela umbusi ukuba avalize indawo enkulu ejikeleze intaba-mlilo. Uhlelo lubiza i-Red Zone (akukho ukufinyeleleka komphakathi) ne-Blue Zone (ukufinyelela okukhawulelwe). Izikhulu zezinsizakalo eziphuthumayo zikhungathekile ngoba umphakathi ubonakala ungahlali uqaphele ingozi.
NgoMashi 27 kuya ku-Ephreli 18, 1980
Ukuzamazama komhlaba nokuqhuma okwenziwe ngamanzi kuqhutshwa futhi kuqhubeke phakathi nalesi sikhathi.
Ngo-Mashi 20, 1980
Ukuzamazama komhlaba okungamakhulu angu-4.1, okungafani nanoma yikuphi okwakubonwe ngaphambili endaweni, kwenzeka kuphela enyakatho-ntshonalanga yenhlangano yaseSt. St Helens. Ama-Seismologists ayengaqiniseki ukuthi lezi zizamazama komhlaba zokuqala zazihlobene yini nokusebenza komlilo. Banqume ukuhambisa ezinye ze-seismometers ukuze ziqaphe kangcono umsebenzi wesikhathi esizayo.
NgoMashi 15-19, 1980
Ukuzamazama komhlaba okuncane kakhulu kubhalwe phansi, kodwa akubonakali njengababikezeli basheshayo emisebenzini engenzeka ye-volcanic.
Umthombo Wedatha: USGS / Cascades Volcano Observatory. Hlola lewebhu ukuze uthole ukulandelana kwesikhathi okuningiliziwe.
>> Umsebenzi wakamuva we-Mount St. Helens
>> Umlando we-Mount St. Helens Umsebenzi
Njengoba izintaba zihamba, iNtaba iSt. Helens isencane. Izindleko ezindala ezaziwa ezindala-mlilo zaqhuma cishe eminyakeni engama-50-40 000 edlule, futhi i-cone eyahlukana ngo-1980 ingu-2200 kuphela ubudala. Amanye amaNdiya asePacific Northwest abizwa ngokuthi iNtaba iStens Helens "uLouwala-Clough," noma "intaba yokubhema." Igama lanamuhla, iNtaba iSt. Helens, lanikezwa ngenqwaba yezintaba-mlilo ngo-1792 nguKaputeni George Vancouver waseBrithani Royal Navy, umgcini wezilwandle kanye nomhloli wokuhlola.
Wabiza ngokuthi udumo lomuntu wakuleli zwe, u-Alleyne Fitzherbert, ophethe isihloko uBaron St. Helens futhi owayengumengameli waseBrithani eSpain. I-Vancouver nayo ibiza ezinye izintaba-mlilo ezintathu eCascades - Mounts Baker, Hood, naseRainier - ezikhulwini zaseBrithani zempi.
Nakhu okuvelele komsebenzi we-Mount St Helens eminyakeni engama-2000 edlule:
Imbuzi Yembuzi Iminyaka Ephuzayo
Cishe ngo-1800 AD
Le nkathi ephuthumayo yahlala iminyaka eyi-100-150. Izenzakalo ezaziwayo zifaka ukuqhuma komlotha ngo-1842, okwalandelwa yi-extrusion ye-Goat Rocks dome. Ama-akhawunti wangokufanayo abonisa umsebenzi izikhathi eziningana phakathi nama-1840 no-1850, kodwa angabalulekile futhi aphikisana. Umsebenzi wokugcina obalulekile ngaphambi kuka-1980 kwaba "umusi obomvu nomlilo" ngo-1857, nakuba ukuqhuma okuncane okungaqinisekisiwe kwabikwa ngo-1898, 1903, no-1921
I-Kalama Eruptive Period
1479 kuya ku-1482 AD
Lesi sikhathi esiphuthumayo sasihlanganisa ama-ejections amabili amakhulu, kanye nokugeleza kwe-lava nesakhiwo se-dome.
Isikhathi Sokuphuza Soshukela
Cishe ngo-800 AD
INtaba yaseSt. Helens yavuselelwa ngokuhlanganiswa kwesakhiwo se-dome, ukuqhuma kwe-lateral, nokuphuma kwe-pyroclastic phakathi nalesi sikhathi sezenzo zentaba-mlilo.
I-Period Yokuqeda I-Castle Creek
200 BC kuya ku-300 AD
Umsebenzi omkhulu phakathi nalesi sikhathi wawuhlanganisa ukuxoshwa komlotha, ukugeleza kwe-pyroclastic, kanye nokugeleza kwe-lava.
Umthombo Wedatha: USGS / Cascades Volcano Observatory: Mount St. Helens Umlando Ophuzayo
>> Imininingwane ka-1980 iSt. St Helens Umsebenzi
>> Umsebenzi wakamuva we-Mount St. Helens