Magma chambers are large pools that hold the lava in a volcano. Lava is the rock that comes out of the volcano during an rupture. The Main Vent is the point where the lava reaches the Earth’s surface. The Crater is the area of the volcano where there is a depression due to the activity of a volcano. Secondary Vents are extra vents that the lava seeped through Secondary Cones are built by lava and are on the volcano.
There is a convergent boundary on the west side of the United States. At a convergent boundary, two plates collide, and the denser plate is subducted. Volcanoes and earthquakes are common as a result of pressure and friction. There is also a transform boundary forming the San Andreas Fault which is between an oceanic plate subducting under a continental plate. 3.
At destructive plate margins, the oceanic plate goes under the continental plate due to it’s more dense, which is a process known as subduction. The oceanic plate moves down into the mantle entre the benioff zone where it’s melted and destroyed because a pool of magma formed. The magma then rises through the cracks in the crust called vents and it erupts on the surface forming a volcano. There are also different types of volcano for examples composite volcanoes, shield volcanoes and dome volcanoes. For constructive plate margins, the magma rises up into the gap that created by the plate move apart to form a volcano.
Due to high temperatures in the mantle of around 3000 degrees centigrade, this oceanic crusts melts and then rises due to the convection currents in the aesthenosphere . As it joins with trapped seawater and sediment, it melts the overlying continental crust, and the magma plumes rise to the surface. They contain more silica so are more viscous, which plugs up the volcano, meaning pressure build up. This is why these volcanoes are so explosive. Another type of plate boundary are constructive, which is the margin between two diverging plates where new magma
The Sociological Imagination and Hurricane Sandy: Was Hurricane Sandy a Personal Trouble or Public Issue? Hurricane Sandy hit the United States on October 29, 2012, destroying the Northeast. Soon after landfall, media started calling this perfect storm “Superstorm Sandy” and “Frankenstorm.” Killing over one hundred people, this thirteen-day storm, affected twenty-four states, including the entire eastern seaboard from Florida to Maine and west across the Appalachian Mountains to Michigan and Wisconsin. The most severe damage was in New Jersey and New York. Sandy left tens of thousands homeless, crippled mass transit, triggered paralyzing gas shortages, inflicted billions of dollars in infrastructure damage and cut power to more than 8million homes.
Human impacts – Many buildings collapsed, 18 lives were taken and caravan parks were wrecked. The fire brigade got 6000 calls in less than 24 hours. A ship capsized at Dover and a cross-channel ferry beached at Folkestone. Many power lines were taken down and transport was disrupted for weeks. 3) Preparations + Responses - During the evening of 15 October, radio and TV forecasts mentioned strong winds but indicated heavy rain would be the main feature, rather than strong wind.
states. At the same time, snow, ice, and several entire glaciers on the mountain melted, forming a series of large lahars (volcanic mudslides) that reached as far as the Columbia River. Less severe outbursts continued into the next day only to be followed by other large but not as destructive eruptions later in 1980. By the time the ash settled, 57 people (including innkeeper Harry Truman and geologist David A. Johnston) and thousands of animals were dead, hundreds of square miles reduced to wasteland, over a billion U.S. dollars in damage had occurred ($2.74 billion in 2007 dollars[1]), and the face of Mount St. Helens was scarred with a huge crater on its north side. At the time of the eruption, the summit of Mount St. Helens was owned by the Burlington Northern Railroad, but afterward the land passed to the United States Forestry Service.
pyroclastic flow – scoria Which of the following sites would most likely have composite volcanoes? A is on an island arc, B is in the Andes, C is near Hawaii, D is along a mid-ocean ridge. e. A and B 9 The main hazard that Mount Rainier poses to Tacoma and its suburbs is d. volcanic mudflows What types of rocks would be most common in the volcano in this photograph? b. scoria and other vesicular basalt What is a main hazard of this type of volcano? c. hot fragments thrown a short distance from the volcano Which of the following volcanoes is generally the largest?
The 2011 Puyehue-Cordón Caulle eruption is a volcanic eruption that began in the Puyehue-Cordón Caulle volcanic complex in Chile on 4 June 2011. Misleadingly called by media the Puyehue eruption – the eruption is actually from the Cordón Caulle fissure. At least 3,500 people were evacuated from nearby areas, while the ash cloud was blown across cities all around the Southern hemisphere, including Bariloche, Buenos Aires, Montevideo, Stanley, Porto Alegre, Cape Town, Hobart, Perth, Adelaide, Sydney, Melbourne, Wellington and Auckland, forcing airlines to cancel hundreds of international and domestic flights and causing travel chaos. By 18 June the ash cloud had completed its first circle of the globe. The Chilean civil aviation authority said that "the tip of the cloud that has travelled around the world has more or less reached the town of Coyhaique", about 600 kilometres south of the Puyehue-Cordón Caulle.
This hurricane killed about 40 people in New York City and most of the deaths were in Staten Island. Hurricane Sandy also caused major flooding in many places like Long Island, Staten Island and lower part of Manhattan. A lot of Con Edison trucks are trying to fix the power shortages and also remove many trees that had fallen. Many bridges were also closed and so many people couldn’t get to work.