Volcanic Eruptions. Ann O. Squire

Volcanic Eruptions


Volcanic.Eruptions.pdf
ISBN: 9780531225158 | 48 pages | 2 Mb


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Volcanic Eruptions Ann O. Squire
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The largest eruption ever recorded, in Indonesia 200 years ago, wreaked havoc across the world. Some volcanic eruptions are explosive and other are not. Lakagígar is part of a volcanic system centered on the Grímsvötn volcano and including the Þórðarhyrna volcano. How to Survive a Volcanic Eruption. Monitors volcanoes and collects scientific information on volcanoes in the United States and elsewhere to reduce the risk from volcanic activity. Volcanic activity can result in explosions called plinian eruptions that shoot rocks, ash, and gas hundreds of feet into the air. The following table lists the deadliest volcanic eruptions in the world on record according to name, year, number of deaths, and major cause of deaths. The Chaitén volcano entered a new eruptive phase for the first time in about 9,500 years on the morning of May 2, 2008. Volcanoes are vents in Earth's surface where molten rock, ash and gases erupt. The eruption of Mount Pinatubo in 1991 was the largest volcanic eruption in 80 years. How explosive an eruption is depends on how runny or sticky the magma is. In a volcanic eruption, lava, tephra (volcanic bombs, lapilli, and ash), and various gases are expelled from a volcanic vent or fissure. The effects of volcanic eruptions on recent winters are modest in scale, but historically have been significant. Some volcanoes are active, others dormant and others extinct.





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