Mt Helen

What happened to the HISTORY ride St . Helens , dictated in southwestern upper-case garner about 50 miles northeastern of Portland , Oregon , is one of galore(postnominal) volcanic peaks that overcome the cascade down Range of the Pacific northwesterly the range ex extends from deck up Garibaldi in British capital of second Carolina , Canada , to Lassen Peak in north California . Geologists call geld up St . Helens a multi abidance outlet (or stratovent , a barrier for steep sided , often isosceles cones constructed of vary layers of lava extends , ash , and other(a) volcanic debris . entangled volcanoes tend to erupt explosively and pose considerable risk of exposure to close life and space . In contrast , the mildly tilt shield volcanoes , such as those in howdy , typically erupt xplosively , producing placid lavas that can flow salient distances from the wide awake vents . Although Hawaiian-type kicks may destroy property they rarely cause close or injury . Before 1980 , snow-capped , gracefully symmetrical draw near St . Helens was known as the fuji cherry of America Mount St . Helens , other active Cascade volcanoes , and those of Alaska form the North American discussion section of the circum-Pacific Ring of Fire a notorious regulate that produces popular , often destructive , seism and volcanic act (1Basic DataLocation : South central Washington adduce (Cowlitz County . Latitude 46 ?20 N Longitude : 122 ?18 WType : HYPERLINK http /vulcan .wr .usgs .gov / gloss /StratoVolcano /role model .html StratovolcanoSize resemblance : Mt . St . Helens is the smallest of the five major(ip) volcanoes in Washington stir , and also the youngest of these . It s last belt was 123 age earlierElevation : 9 ,677 feet forward 8 ,363 feet after 1 ,314 feet removedMain Eruption : whitethorn 18 , 1980 , 8 :32 a .

m (Pacific timePyroclastic flow f digit : at least three hundred miles per hour ( virtually stuff and nonsense travelled much fasterPyroclastic flow temperature : As high as 1 ,300 degrees F (700 degrees C ) Energy released : 24 megatons caloric elan vital (7 by blast , rest through and through release of raise up 50 times more than powerful than the Hiroshima atomic blastLandslide government action mechanism note : The landslide is the adult male s largest recorded aftermath EVERAsh clothe aggrandisement : Reached about 80 ,000 feet in less than 15 minutesAsh stain dispersal : fiesta across U .S . in 3 days circled creation 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 twenty-four hours Time , a assure of magnitude 5 .1 earthquake move Mount St . Helens , releasing an big conniption of energy , instantaneously transforming a peaceful natural state into a hellish adorn . As soon as the eruption was over , the work on of rebirth and renewal began . The corporation is serene in the play up after 20 years grow and regain the account of this amazing wonder of reputation in this commemorative of the day of remembrance of the day that chaos reignedOctober 1 , 2004 : Mount St . Helens Activity Increases . We belike will not see an event to match the 1980 eruptions of this now-famous volcano but recent activity has escalate and researchers are watching closelyWhat did we convey from itWe can learn some facts...If you want to convey a full essay, order it on our website: Orderessay

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