Tsis ntev los no Volcanic Kev Ua
Tsuas yog thaum peb pib xav tias Mount St. Helens yog nyob rau hauv, qhov khoov hluav taws los yog lub nkoj tawg. Ntawm no yog lub sijhawm ntawm Mount St.
2005 tuaj
Mount St. Helens tseem yuav ua rau qis qis ntawm seismicity, qis qis ntawm cov pa thiab cov hluav taws kub volcanic, me me ntawm cov ntoo tshauv, thiab kev loj hlob ntawm tus tshiab lava dome hauv cov kev ua kom haum.
Peb Hlis 8, 2005
Mount St. Helens roob hluav taws kub ua rau muaj kev tshwm sim me me, nrog rau cov ua haujlwm-thiab-ash plume ncav cuag ib qhov chaw siab tshaj ntawm 36,000 feet saum toj no hiav txwv.
Lub Ib Hlis 16, 2005
Kev tawg ua tawg ua rau tawg poob thiab pob zeb loj li 1 meter ntawm cov huab cua thiab tshauv eastward mus rau lub roob hluav taws sab hnub tuaj.
Lub Kaum Hlis 11, 2004 los qhia
Ib tug tshiab thiab txawv txawv lava dome pib tshwm; nws tseem loj hlob thiab hloov.
Kaum Hli 5, 2004
Qhov feem ntau vigorous chav-thiab-ash tawg txij thaum pib ntawm unrest. Nws kub ntev li ib teev. Cov ntoo tshauv tau nce mus txog 3,700 m (12,000 ft) thiab tawm mus sab qaum teb sab qaum teb. Ib lub teeb taws tshauv tau ploj mus rau hauv Morton, Randle, thiab Packwood, txog 50 km (30 mi). Lub teeb pom kev zoo cuam tshuam rau sab hnub tuaj ntawm Mount Rainier National Park, 110 km (70 mi) north-northeast.
Kaum Hlis 1, 2004
Lub thawv ua me me, muaj me me ntoo tshauv, tawm ntawm lub qhov cub ntawm sab qab teb ntawm 1980-86 qab qab zib
Lub Cuaj Hli 23-25, 2004
Cov av qeeg me me, qhov av qeeg (me tshaj 1) pib thaum sawv ntxov hnub tim 23 Lub Cuaj Hli, tau pib ncav rau lub 9 hli ntuj vas thib 24, tom qab tav su ntawm lub Cuaj Hli 25.
Cov ntaub ntawv Source: USGS / Cascades Volcano Observatory
>> Cov ntsiab lus ntawm 1980 Mount St.
Txhua yam pib ntawm lub Peb Hlis 15, 1980, thaum Mount St. Helens pib ib lub sij hawm ntawm kev ua dej tsawg tsawg los ua dej ntws. Raws li qhov kev ua si escalated, lub roob hluav taws cia peb tag nrho rau ntawm ntug ntawm peb cov rooj zaum. Ntawm no yog cov ntsiab lus tseem ceeb ntawm cov xwm txheej uas ua rau lub Plaub Hlis 18 , uas nyob rau sab nraud raws li kev pom zoo.
Tsib Hlis 17, 1980
Cov tub ceev xwm siv tub ceev xwm tuaj yeem kwv yees txog 50 lub tsheb thauj khoom ntawm cov tswv khoom ntiag tug mus rau hauv Tebchaws Thaj Tsam Red Race kom rov qab tau cov khoom.
Tsib Hlis 7-13, 1980
Hluav taws xob tawg me me ntawm cov pa taws thiab cov ntoo tshauv yog tawm ntawm lub roob hluav taws. Tshaj tawm hauv av qeeg mus txog qhov siab 4.9.
Lub Plaub Hlis 29, 1980
Cov nom tswv tau thov tus tswv xeev kom kaw ib cheeb tsam ze ntawm lub roob hluav taws. Lub hom phiaj hu ua Red Zone (tsis pub siv rau pej xeem) thiab Blue Zone (txwv kev txwv). Cov neeg ua hauj lwm thaum muaj xwm ceev yuav ntxhov siab vim hais tias pej xeem tau tshwm sim kom tsis txhob paub txog qhov txaus ntshai.
Peb Hlis 27 txog Plaub Hlis 18, Xyoo 1980
Av qeeg thiab cov nplaim tawg tau tshwm sim tawm thiab nyob rau lub sijhawm no.
Peb Hlis 20, 1980
Ib qho chaw nruab nrab ntawm qhov av qeeg 4.1, tsis zoo li txhua yam uas tau pom yav tas los nyob rau cheeb tsam, tau tshwm sim qaum teb ntawm lub qhov ua siab ntawm Mount St. Helens. Cov seismologists tsis meej txog seb puas yog thawj av qeeg tau hais txog kev ua dej volcanic. Lawv tau txiav txim siab los xa cov seismometers ntxiv kom thiaj li zoo saib xyuas yav tom ntej.
Peb Hlis 15-19, 1980
Muaj qee cov av qeeg me me raug kaw, tab sis tsis pom zoo tam sim ntawd precursors rau volcanic ua si.
Cov ntaub ntawv Source: USGS / Cascades Volcano Observatory. Mus saib lub vev xaib no rau ib qho kev qhia ntau dua ntxiv.
>> Tsis ntev los no Mount St.
>> Qhov Chaw Tshawb Xyuas Mount St.
Raws li cov roob mus, Mount St. Helens yog cov hluas. Lub roob hluav taws kub tshaj plaws twb paub txog 50-40 txhiab xyoo dhau los lawm, thiab lub khob hluav taws uas qee lawm thaum xyoo 1980 tsuas yog 2200 xyoo xwb. Qee tus neeg Qhab Asmeskas ntawm Pacific Northwest tau hu ua Mount St. Helens "Louwala-Clough," lossis "tob tob rau haus luam yeeb." Lub npe niaj hnub, Mount St. Helens, tau muab rau lub volcanic ntim nyob rau hauv 1792 los ntawm Tus Thawj Coj ntawm George Vancouver ntawm Npau Suav Royal Navy, tus seafarer thiab explorer.
Nws lub npe hu ua honourman, Alleyne Fitzherbert, uas tuav lub npe Baron St. Helens thiab leej twg yog lub sijhawm tus British Ambassador rau Spain. Vancouver kuj hu ua peb lwm lub roob hluav taws nyob rau hauv lub Cascades - Mounts Baker, Hood, thiab Rainier - rau cov tub ceev xwm hauv British.
Ntawm no yog cov ntsiab lus ntawm Mount St. Caw ua haujlwm dhau xyoo 2000:
Tshis Pob Zeb Eruptive Lub Sij Hawm
Kwv yees li ntawm 1800 AD
Lub sijhawm no pib ua 100-150 xyoo. Cov xwm txheej paub muaj xws li tshauv explosions nyob rau hauv 1842, uas tau ua raws li los ntawm extrusion ntawm Goat Pob zeb dome. Cov cim nyiaj qhia tau hais tias muaj kev ua ub ua no ntau zaus thaum lub sijhawm xyoo 1840 thiab 1850s, tab sis tsis muaj qhov tshwj xeeb thiab tsis tseem ceeb. Qhov tseem ceeb tshaj plaws ua ntej 1980 yog "kev haus luam yeeb thiab kev tua hluav taws" thaum xyoo 1857, tab sis tsis tau muaj hnub nyoog, tsis tau muaj kev sib nkag siab nyob rau xyoo 1898, 1903, thiab 1921
Kalama Eruptive Lub Sij Hawm
1479 txog 1482 AD
Lub sij hawm eruptive no muaj ob qho loj ntawm cov tshauv, nrog rau cov lava ntws thiab lub tsev.
Qab Zib Ntauv Lub Caij Tawm
Kwv yees li 800 AD
Mount St. Helens tau muab kho dua los ntawm kev sib txuas ntawm lub tsev dome, ib qho chaw ntxiv, thiab pyroclastic ntws thaum lub sij hawm no lub sij hawm ntawm volcanic kev ua si.
Castle Creek Eruptive Lub Sij Hawm
200 BC rau 300 AD
Cov dej num loj thaum lub sijhawm no muaj cov ejextions ntawm cov ntoo tshauv, pyroclastic cov tsev, thiab cov dej ntws.
Cov ntaub ntawv Source: USGS / Cascades Volcano Observatory: Mount St. Helens Eruptive History
>> Cov ntsiab lus ntawm 1980 Mount St.
>> Tsis ntev los no Mount St.