Sanin sha'awa game da Dutsen St Helens

01 na 05

Gabatarwa zuwa Mount St. Helens

Mount St. Helens yana daya daga cikin kudancin Arewa maso yammacin Pacific. Wani ɓangare na abin da aka sani da Wuta na Wuta ta Rim, Mount St. Helens ya shahara ne saboda kwanan nan da ci gaba da aiki. Mount St. Helens daga cikin Cascade Mountain Range a jihar Washington, kusa da tsakiyar Seattle da Portland.

Dutsen da kanta, tare da yankunan da ke kewaye da ita, an kiyaye su kamar tsaunin Mount St. Helens National Volcanic Monument. Tsarin wuri a cikin abin tunawa an yarda ya dauki hanyarsa don dawowa, samar da kwarewa na ilmantarwa ga masana kimiyya da jama'a. Masu ziyara zuwa Mount St. Helens National Volcanoic Monument za su sami wasu wuraren zama masu ban sha'awa da dama da ra'ayoyi masu ban sha'awa.

Game da Rushewar Mount St. Helens na 1980: Tsarin abubuwan da suka faru

Game da Rushewar Mount St. Helens na 1980: Impacts

Recent Mount St. Helens aiki

Mount St. Helens Ayyuka Ta Tarihi

02 na 05

Game da Rushewar Mount St. Helens na 1980: Tsarin abubuwan da suka faru

Mount St. Helens ya tashi a ranar 8 ga Mayu, 1980, a ranar 8 ga watan Mayu na 1980, tunatar da jama'ar yankin Arewacin Arewa maso yammacin duniya da kuma mutane a duk fadin duniya. Hakan ya faru ne a yawancin jihohi na Amurka, tare da fadi mai nisa kamar Oklahoma. Ziyarci Dutsen St. Helens da kanka don ƙarin koyo game da tarihin dutsen mai fitad da wuta da halin yanzu.

Hanyoyin abubuwan da suka faru a lokacin tsawan tsaunin Mount St. Helens a ranar 18 ga Mayu:

• Girgizar girgizar kasa ta 5.1
• Rashin girma da yankunan da ke kewaye da arewacin dutsen mai tsabta sun ɓace, sakamakon haka ya haifar da babbar tuddai na duwatsu, laka, da kuma tarkace wanda ya cika kilomita 24 na kwari
• Sakamakon sakin matsa lamba daga cikin dutsen mai fitattun wuta ya fito da wani nau'i na ash da lada

Hanyoyin abubuwan da suka haifar da rushewa: Maris - May, 1980

An fara ne a ranar 15 ga Maris, 1980, lokacin da Dutsen St. Helens ya fara aiki na yanki. Yayin da aikin ya taso, dutsen mai tsabta ya kiyaye mu a gefen wuraren zama. Ga abubuwan da suka faru daga abubuwan da suka faru har zuwa babban mayafin Mayu 18, a cikin sake tsara tsari.

Mayu 17, 1980
Jami'an tilasta bin doka sun jawo kimanin kayan hawa 50 na masu mallakar dukiya a cikin Red Zone don dawo da dukiya.

Mayu 7-13, 1980
Ƙananan fashewa na tururi da ash suna fitowa daga dutsen mai fitattun wuta. Girgizar girgizar kasa har zuwa girma 4.9.

Afrilu 29, 1980
Jami'ai na jihar sun tambayi gwamnan ya rufe babban yanki a kan tsaunuka. Shirin da ake kira Red Zone (babu damar jama'a) da kuma Blue Zone (ƙuntataccen damar shiga). Jami'an sabis na gaggawa suna takaici saboda jama'a sun bayyana cewa basu da masaniya game da haɗari.

Maris 27 zuwa Afrilu 18, 1980
Girgizar asa da fashewar fashewa sun tashi a yayin wannan lokacin.

Maris 20, 1980
Girman girgizar kasa mai girma, ba kamar wani abin da aka gano a yankin ba, ya faru ne kawai a arewa maso yammacin taro na Mount St. Helens. Masana kimiyya sun kasance ba tabbas ba ne game da irin wadannan girgizar asa na farko da suka shafi aikin volcanic. Sun yanke shawarar ƙaddamar da ƙarin leisometers domin su lura da aikin da zai faru a nan gaba.

Maris 15-19, 1980
An rubuta wasu raƙuman girgizar ƙasa kadan, amma ba a gane su a matsayin wadanda suka dace da sauri ba.

Bayanin Bayanin Bayanai: USGS / Harshen Dandalin Tsarin Giraguni. Bincika wannan shafin yanar gizon don ƙarin jerin bayanai.

03 na 05

Game da Rushewar Mount St. Helens na 1980: Impacts

Hanyoyin da suka faru a kan tsaunin Mount St. Helens na 1980 sun haɗa da:

• Dutsen St. Helens ya rage ta tsawon mita 1,300
• Kudancin wutar ya fadi har zuwa kilomita 930
• Rashin ruwa da lakaran sun binne Dutsen Allle zuwa zurfin kusan mita 50
• Rushewar ya dade har awa 9
• 57 mutanen da suka rasa rayukansu, ko har yanzu ana ganin sun rasa
• Ramin kilomita 250 na ƙasar ya lalace
• An kashe dabbobin "marasa yawan" - kiyasta suna da manyan dabbobi 7,000 da miliyoyin tsuntsaye, kifaye, da kananan dabbobi
• Ƙananan lalacewar ya ci gaba a shekarar 1986

Facts da kuma samfurori da aka samo daga taron USGS

04 na 05

Recent Mount St. Helens aiki

Kamar dai lokacin da muka fara tunanin Mount St. Helens yana sauka, dutsen mai fitattun wuta ko ruwaye. Ga wani lokaci na kwanan nan na aikin St. St. Helens.

2005 don gabatarwa
Mount St. Helens yana ci gaba da samun ƙananan raguwa, ƙananan iska da tururuwan gas, ƙananan kayan samar da ash, da kuma ci gaban sabon tsararrakin wuta a cikin dutsen.

Maris 8, 2005
Dutsen tsaunin Mount St. Helens ya sami wani mummunar fashewar yanayin, tare da sakamakon tudu-da-ash plume wanda ya kai kimanin mita 36,000 sama da teku.

Janairu 16, 2005
Rashin fashewa wanda ya watsar da dutsen ash da duwatsu kamar manyan mita 1 a cikin dutse da kuma gabashin gabas a kan tsaunin tsaunuka na gabas.

Oktoba 11, 2004 don gabatarwa
Wani sabon yanayi mai rarrabe ya bayyana; yana cigaba da girma da canji.

Oktoba 5, 2004
Harshen tsire-tsire da tsire-tsire mafi tsananin karfi tun daga farkon tashin hankali. Ya dade fiye da sa'a ɗaya. Gidan ya kai kimanin kilomita 3,700 (12,000 ft) da kuma arewacin arewa maso gabas. Hasken wuta ya fadi a garuruwan Morton, Randle, da Packwood, kimanin kilomita 50 (30 m). Fuskantar haske ya shafi yankin kudu maso gabashin Mountain Rainier National Park, 110 km (70 mi) arewa maso gabas.

Oktoba 1, 2004
Wani ƙananan tururuwar tururi, tare da ƙananan ash, ya fito daga iska a kudancin shekarun 1980-86

Satumba 23-25, 2004
Tsarin kananan, raƙuman girgizar kasa (karami da girma 1) ya fara a ranar 23 ga watan Satumba, ya tashi a ranar 24 ga Satumba, sa'an nan ya ki yarda a cikin rana ta Satumba 25.

Bayanin Bayanin Bayanai: USGS / Harshen Dandalin Tsarin Giraguni

05 na 05

Mount St. Helens Ayyuka Ta Tarihi

Kamar yadda duwatsu ke tafiya, Mount St. Helens yaro. Kusan shekaru 50 zuwa dubu 50 da suka wuce, asusun ajiyar wutar lantarki ya rushe kimanin shekaru 50-40, kuma macijin da ya ragu a 1980 yana da shekaru 2200 kawai. Wasu Indiyawan da ke arewacin Arewa maso yammacin da ake kira Mount St. Helens "Louwala-Clough," ko "dutse mai shan taba." Sunan na zamani, Mount St. Helens, an ba da kyautar jirgin saman a cikin 1792 da Kyaftin George Vancouver na Birtaniya Royal Navy, mai tudun ruwa da mai bincike. Ya yi suna ne don girmama dan kasarsa, Alleyne Fitzherbert, wanda ke dauke da sunan Baron St. Helens kuma wanda yake lokacin da jakadan Birtaniya a Spain. Vancouver kuma ya kira wasu tsaunuka guda uku a cikin Cascades - Baker Bounts, Hood, da Rainier Mounts - domin shugabannin Birtaniya.

Anan ne abubuwan da aka nuna a kan aikin Mount St. Helens a cikin shekaru 2000 da suka gabata:

Goat Rocks Eruptive Period

Kimanin 1800 AD
Wannan lokacin ya ɓace tsawon shekaru 100-150. Abubuwan da aka sani sun hada da fashewar fashe a cikin 1842, wanda ya hada da tsauraran dome na Goat Rocks. Litattafan zamani suna nuna aiki sau da yawa a cikin shekarun 1840 zuwa 1850, amma basu da takamaimai ko ma saba wa juna. Babban aikin da ya fi muhimmanci kafin 1980 shine "hayaki mai yawa da wuta" a shekara ta 1857, kodayake qananan, rahotannin da ba a tabbatar da su ba ne a 1898, 1903, da 1921

Kalama Eruptive Period

1479 zuwa 1482 AD
Wannan lokacin ɓarna ya ƙunshi manyan manyan motsin wuta guda biyu, da kuma kwararar ƙwayar wuta.

Sugar Bowl Tsauraran lokaci

Kimanin 800 AD
Dutsen St. Helens ya sake farfado da shi ta hanyar haɗin gine-ginen dutse, da tazarar layi, da kuma pyroclastic na gudana a lokacin wannan aikin volcanic.

Ranar Tsarin Kudi na Castle Creek

200 BC zuwa 300 AD
Babban aiki a lokacin wannan zamanin ya hada da juriya na ash, pyroclastic kwarara, da kuma kwarara yana gudana.

Bayanin Bayanai: USGS / Harshen Dandalin Tsarin Gidan Dama: Dutsen St. Helens