What happened to the HISTORY sight St . Helens , turn up in southwestern capital letter about 50 miles northeasterly of Portland , Oregon , is one of galore(postnominal) vol tail assemblyic peaks that master the shower bath Range of the Pacific northwestern United nominates the range ex guides from spring up Garibaldi in British capital of South Carolina , Canada , to Lassen Peak in confederacy California . Geologists call go up St . Helens a composite release (or stratovent , a term for take in sided , often biradial cones constructed of alternate layers of lava flows , ash , and other vol washstandic debris . Composite volcanoes range to erupt explosively and airs considerable danger to final stage life and quality . In contrast , the gently tar shield volcanoes , such as those in Hawaii , typically erupt xplosively , producing fluid lavas that can flow great distances from the quick vents . Although Hawaiian-type outbreaks may destroy property they r bely cause cobblers last or injury . onward 1980 , snow-capped , grace widey cruciform come on St . Helens was known as the Fujiyama of America upgrade St . Helens , other active rain shower volcanoes , and those of Alaska form the North American segment of the circum-Pacific Ring of drive out a notorious determine that produces frequent , often foul , earthquake and volcanic exercise (1Basic DataLocation : South central upper-case letter State (Cowlitz County . Latitude 46 ?20 N Longitude : 122 ?18 WType : HYPERLINK http /vulcan .wr .usgs .gov /Glossary /StratoVolcano / framework .html StratovolcanoSize comparing : Mt . St . Helens is the smallest of the five study volcanoes in Washington State , and also the youngest of these . It s last bash was 123 days earlierElevation : 9 ,677 feet forwards 8 ,363 feet after 1 ,314 feet removedMain Eruption : whitethorn 18 , 1980 , 8 :32 a .
m (Pacific timePyroclastic flow further : at to the lowest degree 300 miles per instant ( nearly material travelled much fasterPyroclastic flow temperature : As high as 1 ,300 degrees F (700 degrees C ) qualification released : 24 megatons thermal get-up-and-go (7 by blast , lie through release of heat 50 times more(prenominal) powerful than the Hiroshima atomic blastLandslide follow : The landslide is the World s largest save detail EVERAsh plume spinning top : Reached about 80 ,000 feet in less than 15 minutesAsh outpouring dispersal : Spread crosswise U .S . in 3 days circled Earth in 15 daysDeaths : At least 60-65 persons , and thousands of animals , birds , and insects (2On May 18 , 1980 , at 8 :32 a .m . Pacific Daylight clip , a magnitude 5 .1 earthquake shook Mount St . Helens , releasing an enormous smash of energy , instantly transforming a peaceful wilderness into a hellish landscape . As soon as the hit was over , the process of renascence and renewal began . The mountain is hush up away in the glower after 20 years number and try the invoice of this amazing wonder of record in this commemorative of the anniversary of the day that chaos reignedOctober 1 , 2004 : Mount St . Helens Activity Increases . We credibly will not see an event to match the 1980 eruptions of this now-famous volcano but recent application has step up and researchers are watching closelyWhat did we learn from itWe can learn some facts...If you involve to get a full essay, order it on our website: Ordercustompaper.com
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