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meters) of the peak collapsed or blew outwards. As a result, 24 square miles (62 square kilometers) of valley was filled by a debris avalanche, 250 square miles (650 square kilometers) of recreation, timber, and private lands were damaged by a lateral blast, and an estimated 200 million cubic yards (150 million cubic meters) of material was deposited directly by lahars (volcanic mudflows) into the river channels. Sixty-one people were killed or are still missing. USGS Photograph taken on May 18, 1980, by Austin Post.
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cendra del volcà. 400 metres del puig van col·lapsar o van sortir volant. Com a resultat 62 quilometres quadrats de la vall van ser emplenats per la runa, 650 quilometres quadrats de llocs d'esbarjo, bosc, i finques privades van ser damnificades per una ràfega lateral, i una quantitat estimada en 150 milions de metres cúbics de material van ser dipositats per corrents de fang volcànic en els canals del riu. Cinquanta set persones van morir o han desaparegut (18 de Maig de 1980, Austin Post, USGS)
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On May 18, 1980, at 8:32 a.m. Pacific
Daylight Time, a magnitude 5.1 earthquake shook Mount St. Helens. The bulge and surrounding area slid away in a gigantic rockslide and debris avalanche, releasing pressure, and triggering a major pumice and ash eruption of the volcano. Thirteen-hundred feet (400
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El 18 de maig, a les 8:32 a. m. Temps del Pacífic, un terratrèmol de una magnitud de 5,1 va fer trontollar la muntanya St. Helens. La protuberància l'àrea circumdant relliscà en una gegantina esllavissada de roques i un allau de rocam, alliberant la pressió, desencadenà una erupció de pedra tosca i
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960:{{Information |Description={{en|On May 18, 1980, at 8:32 a.m. Pacific Daylight Time, a magnitude 5.1 earthquake shook Mount St. Helens. The bulge and surrounding area slid away in a gigantic rockslide and debris avalanche, releasing pressure, and triggeri
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Le 18 mai 1980, à 8h32 minutes (heure du
Pacifique), un tremblement de terre de 5,1 sur l'échelle de Richter secoue le
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File talk:MSH80 eruption mount st helens 05-18-80.jpg
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Commons is a freely licensed media file repository.
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American photographer, glaciologist and mountaineer
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1413:Anexo:Erupciones volcánicas en Estados Unidos
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1045:Knowledge (XXG):Main Page history/2020 May 18
1040:Knowledge (XXG):Main Page history/2013 May 18
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184:éruption du mont Saint Helens en 1980
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215:May 18, 1980 Eruption Images
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1483:Catégorie:18 mai 2008
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1443:کوه سنت هلن
1233:Kyselý déšť
955:CarolSpears
890:18 May 1980
258:Description
232:Austin Post
196:18 May 1980
140:Description
1511:_error
1238:Katastrofa
966:File usage
923:Dimensions
626:македонски
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27:File usage
1318:Ηφαίστειο
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