live on volcanoes are safe on many levels like some volcanoes people live on are super quiet eruption volcanoes and they do not erupt and explode like volcanoes people think of. But sometimes disaster do strike and a quiet volcano can become explosive because it is a composite volcano and it can kill and take out everything in its path. Living on volcanoes can be very dangerous if no one knows what their doing however it also can be very good for
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up‚ an example of this is the Mid-Atlantic ridge which Iceland sits near. Figure 7 also shows us that there is a high level of volcanic activity within the pacific ring of fire‚ this is because of the high amount of destructive and constructive plate boundaries within this area and this causes major volcanic disasters. Some places‚ like the United Kingdom‚ are not at risk of a major volcanic disaster because it is not located near a volcano hotspot‚ or a destructive plate boundary. Other reasons
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than the direct effects of lava flows or ash showers are the greatest reason for loss of life. An example is the eruption from the Laki volcano in 1783 (see first link below) in which an estimated 25% of the population of Iceland was killed. "The system erupted over an 8 month period during 1783-1784 from the Laki fissure and the adjoining Grímsvötn volcano‚ pouring out an estimated 14 km3 (3.4 cu mi) of basalt lava and clouds of poisonous hydrofluoric acid & sulphur dioxide compounds that killed
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| * Volcanoes are openings in the Earth’s surface. When they are active they can let ash‚ gas and hot magma escape in sometimes violent and spectacular eruptions. * The word volcano originally comes from the name of the Roman god of fire‚ Vulcan. * Volcanoes are usually located where tectonic plates meet. This is especially true for the Pacific Ring of Fire‚ an area around the Pacific Ocean where over 75% of the volcanoes on Earth are found. * While most volcanoes form near tectonic boundaries
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________________________ Lab 1. Volcanic Hazards VOLCANOES INTRODUCTION Few things excite the imagination as much as a volcanic eruption‚ one of nature’s magnificent spectacles‚ which can result in devastating consequences. The very word “volcano” brings to mind thunderous explosions‚ rivers of fiery orange lava‚ and images of smoking destruction. The actual capacity for destruction is not overrated -- volcanic eruptions are one of the most devastating of all geologic hazards. There are
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Shield volcanoes Main article: Shield volcano Shield volcanoes‚ so named for their broad‚ shield-like profiles‚ are formed by the eruption of low-viscosity lava that can flow a great distance from a vent‚ but not generally explode catastrophically. Since low-viscosity magma is typically low in silica‚ shield volcanoes are more common in oceanic than continental settings. The Hawaiian volcanic chain is a series of shield cones‚ and they are common in Iceland‚ as well. Lava domes Main article: Lava
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constructive C – conservative (3) 9. (5) 10. Constructive – Iceland 2010 Destructive – Japan 2011 Conservative – Haiti 2010 (3) 11. A mountain or hill‚ typically conical‚ having a crater or vent through which lava‚ rock fragments‚ hot vapour‚ and gas are or have been erupted from the earth’s crust. 12. A – shield‚ B- composite (2) 13. A shield Volcano has low sloping sides and frequent but gentle eruptions A composite Volcano has steep sides and explosive eruptions (2) 14. A. ash fall B
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preparation. Common volcanic hazards include: Pyroclastic flows‚ Ash clouds and mudslides. Pyroclastic flows are high-density mixtures of hot‚ dry rock fragments and hot gases that move away from the vent of the volcano at high speeds. They can reaches speeds moving away from a volcano of up to 450 mph and the gas can reach temperatures of about 1‚000 °C. They will catch fleeing victims and kill them instantly thus making them a devastating hazard. Volcanic ash is formed during explosive volcanic
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Assess the extent to which primary rather than secondary impacts are the more serious effects arising from volcanic eruptions. (30 marks) A volcano is an earth hazard that occurs on faults between tectonic plates on a destructive boundary and an eruption is a natural disaster. A primary impact happens immediately after the disaster and before any response like death or collapsing or destruction of buildings. A secondary impact occurs later after the disaster‚ such less farm produce or a reduction
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gentle streams called lava flows or erupt violently into the air. Rocks ripped loose from the inside of the volcano or torn apart by the gas may be shot into the air with the lava. These rocks are blown out of a volcano and are called volcanic bombs. Along with these bombs dust‚ ash‚ lava and cinder are released into the air. Volcanic activity is classified by how often a volcano erupts. A volcano may be active‚ dormant‚ or extinct. Active volcanoes erupt constantly. Dormant volcanoes are inactive‚ but
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