Umsebenzi weVolcanic nje
Kanye xa siqala ukucinga iMount St. Helens ihlala phantsi, i-volcano vents or rumbles. Nanku umgca wexesha lomsebenzi weNtaba yaseSt. St Helens.
2005 ukuza
INtaba yeSt. Helens iyaqhubeka nokufumana amaqondo aphantsi okuhlaselwa kwamanzi, ukukhutshwa okuphantsi kwee-steam kunye ne-volcanic gases, umbane omncinci we-ash, kunye nokukhula kwe-lava yedome ngaphakathi kwinqanaba.
Matshi 8, 2005
Intaba-mlilo yaseMount St. Helens yabhekana nesiganeko esincinci, kunye nesiphumo esinomphunga-mlilo kunye nomlotha ofikelela kwindawo ephakamileyo malunga nama-36,000 amanqanaba angaphezu kwezilwandle.
NgoJanuwari 16, 2005
Ukuqhuma kwe-explosive echithachitha umlotha kunye namatye amakhulu njengamitha engama-1 kwi-crater kunye nomlotha ompuma ngasempumalanga.
Ngo-Oktobha 11, 2004
I-lava yedome entsha neyohlukeneyo yabonakala; iqhubeka ikhula kwaye ishintsha.
Oktobha 5, 2004
Ukuqhuma okukhulu kwe-steam-ash-ash ukususela ekuqalekeni kwemibandezelo. Kwaphela ngaphezu kweyure enye. I-ash ash yafika malunga ne-3,700 m (12,000 ft) kwaye yahamba yenyuka-ntshona-ntshona. Ukuthungulwa komlilo othungayo kwawa kwiidolophu zaseMorton, eRandle, nasePakwoodwood, malunga neekhilomitha ezingama-50. Ukuthungulwa okukhanyayo kwathintela kwicala lasempuma yeNtaba yeRainer National Park, 110 km (70 mi) ngasenyakatho-mpuma-ntshona.
Oktobha 1, 2004
Ukuqhuma kwe-steam encinci, kunye nomlotha omncinci, okhutshwe kwi-wind south of the 1980-86 lava dome
Septemba 23-25, 2004
Inyikima yamancinci (angancinci kunomlinganiselo 1) waqala ngomso kaSeptemba 23, ehamba ngeemini ngoSeptemba 24, ngoko ke yahlaka emva kwemini kaSeptemba 25.
Umthombo wolwazi: USGS / Cascades I-Volcano Observatory
>> Iinkcukacha ze-1980 Mount St. Helens Umsebenzi
Yonke yaqala ngo-Matshi 15, 1980, xa iNtaba yaseStens uHelens iqalile ukusebenza kwexesha elisezantsi. Njengoko lo msebenzi wanda, i-volcano isigcina sonke siphezu kwezihlalo zethu. Nazi iziqendu ezivela kwiziganeko ezikhokelela ekugqibeleni kweMeyi 18 , ngokulandelana kwexesha.
Meyi 17, 1980
Amagosa okuthotyelwa komthetho ahanjiswa malunga neenqwelo ezingama-50 zabaphathi bepropati kwi-Red Zone ukufumana izinto.
NgoMeyi 7-13, 1980
Ukuqhuma okuncane kwe-steam kunye nomlotha kuphuma kwi-volcano. Iinyikima ezingapheliyo ukuya kwi-4.9.
Aprili 29, 1980
Amagosa karhulumente acela irhuluneli ukuba ivale indawo enkulu malunga ne-volcano. Isicwangciso esibizwa ngokuba nguMmandla oBomvu (akukho finyelelo loluntu) kunye neBlue Zone (ukufikelela ngokukhawuleza). Amagosa enkonzo angxamisekileyo akhathazekile ngenxa yokuba uluntu lubonakala luhlala luyazi ingozi.
Matshi 27 ukuya ku-Ephreli 18, 1980
Ukuqubuka komhlaba kunye nokuqhuma kwe-steam kuqhutywe kwaye kuqhubeke ngeli xesha.
Matshi 20, 1980
Inyikima yenani le-4.1, ngokungafani naluphi na olwalufunyenwe ngaphambili kuloo ndawo, lwenzeka nje kumntla-ntshona kwintlanganiso yeSt. St. Helens. Iingcali ze-Seismologists zazingenakuqinisekiswa ukuba ingaba zezi nyikima zokuqala zihlobene nokusebenza kwe-volcanic. Bagqiba ekubeni bathathe i-seismometers eyongezelelweyo ukwenzela ukuba bajonge bhetele umsebenzi ozayo.
Matshi 15-19, 1980
Inani elincinci lenyikima komhlaba lirekhodwa, kodwa ayibonakali njengabaqaphi abasondeleyo kwintsebenzo enokwenzeka ye-volcanic.
Umthombo wolwazi: USGS / Cascades I-Volcano Observatory. Khangela le webhsayithi ukuze uthole ixesha elide elininzi.
Qala >> Umsebenzi weNtaba yaseSt. Helens
>> Umlando weNtaba yaseSt. Helens
Njengeentaba, iNtaba yaseStens iselula. I-volcano yezona zifiloso ezaziwa endala zaziwa malunga ne-50 ukuya kumawaka amawaka amawaka edlulileyo, kwaye i-cone eyahlukana ngo-1980 ingama-2200 kuphela ubudala. Amanye amaNdiya asePacific Northwest abizwa ngokuba yiNtaba iStens Helens "uLouwala-Clough," okanye "intaba yokutshaya." Igama langoku, iSt. St Helens, linikezelwa kwintlanzi ye-volcanic ngo-1792 nguCaptain George Vancouver waseBrithani Royal Navy, umgcini wolwandle kunye nomhloli.
Waqamba igama layo ngokuhlonipha umntu wasekhaya, u-Alleyne Fitzherbert, owayephethe isihloko esithi uBaron St. Helens kunye nalowo owayengummeli waseBrithani eSpeyin. I-Vancouver yaqamba ngamanye ama-volcano amathathu kwi-Cascades - i-Mounts Baker, i-Hood, ne-Rainier-kumagosa aseBrithani.
Nazi iindawo eziphambili zeNtaba yaseSt. Helens kwiminyaka eyi-2000 edluleyo:
Iimbuzi Iimpawu zokuphazamiseka kwexesha
Malunga ne-1800 AD
Eli lixesha elikhuphayo lahlala iminyaka eyi-100-150. Iziganeko ezaziwayo ziquka ukuqhuma komlotha ngo-1842, okwalandelwa ngu-extrusion ye-Goat Rocks dome. Iingxelo zemihla ngemihla kubonisa imisebenzi emininzi kuma-1840 nee-1850, kodwa azinziwayo kwaye zichasene. Umsebenzi wokugqibela obalulekileyo ngaphambi kowe-1980 "wawumsi womlilo kunye nomlilo" ngo-1857, nangona uncinane, ukuqhuma okungaqinisekanga kwabikwa ngo-1898, 1903, no-1921
Ixesha leNkunkuma yokuKalama
1479 ukuya ku-1482 AD
Leli xesha elikhuphayo lalibandakanya i-ejections ebalulekileyo yomlotha, kunye nokuhamba kwelava kunye nesakhiwo sendawo.
Ikhefu leShukela leNtshontsho
Malunga no-800 AD
INtaba yaseStens ihlaziywe ngokudibanisa isakhiwo sezakhiwo, ukuqhutyelwa kwe-lateral, kunye ne-pyroclastic flow ngexesha le-volcanic activity.
Ixesha leNkqantosi yaseChris Creek
200 BC ukuya ku-300 AD
Umsebenzi omkhulu ngeli xesha libandakanya ukuxhamla kwe-ash, ukuhamba kwe-pyroclastic, kunye ne-lava flow.
Umthombo wedatha: USGS / i-Cascades I-Volcano Observatory: INtaba yaseStens i-History of Error
>> Iinkcukacha ze-1980 Mount St. Helens Umsebenzi
Qala >> Umsebenzi weNtaba yaseSt. Helens