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.
This tells us that it’s a powerful earthquake, reaching and being felt by farther away places. This earthquake makes itself more dangerous with little or no warning. Earthquakes are probably the most dangersome natural occurring disaster encountered. South Carolina is located within the interior of the North American plate, far from any plate boundary. An earthquake is what happens when two blocks of earth suddenly slip past one another.
Bills? It wasn’t my fault! According to LawBrain.com oil spills are probably some of the most devastating man-made disasters to occur, particularly from the standpoint of marine environ-mentalists. Also the LawBrain.com defines oil spills as a layer of oil floating on water or covering the shoreline of a body of water, usually petroleum which has leaked from an oil tanker, often presenting a hazard to marine life and the environment. Unfortunately this is what happened on March 24, 1989 in Prince William Sound, Alaska.
SPEECH Location: The earthquake took place in inland Haiti on the island of Hispaniola which is located in the Caribbean Sea. Haiti shares an isle with the Dominican Republic and remains part of the North American continent. Causes: Earthquakes are caused by the movement of the Earth’s tectonic plates. Tectonic plates are large masses of rock that are moving either apart or together consecutively. Quakes happen when the frictional stress from the movement exceeds the strength of the Earth’s rock.
It registered a 7.0 on the Richter scale. The earthquake’s epicenter was extremely shallow at only 8.1 miles below ground, which released the energy close to the surface and intensified the shaking. The increased level of destruction led to a high loss of life. The earthquake epicenter was only 15 miles from Port-au-Prince and was the strongest earthquake to hit the area since 1770. “The 7.0-magnitude earthquake would be a strong, potentially destructive earthquake anywhere, but it is an unusually strong event for Haiti, with even more potential destructive impact because of the weak infrastructure of the impoverished nation” (Thompson, 2010, p.1).
Haiti Earthquake, January 2010 Terrah-Leigh Ann Pietersen On the 12th of January, 2010, an earthquake struck Haiti which measured up to 7.0 on the Richter scale. This caused an estimate of 230, 000 to 316, and 000 to have died. The earthquake was produced form the fault line that separates the Caribbean tectonic plate from the North American plate. The fault line ran from east to west. It was miles away from the capital called Port au Prince.
I will be discussing factors that cause differences in hazards posed by volcanoes. I believe the most important factor is the location of a volcano and the type of volcano. The most explosive and therefore dangerous volcanoes are found on destructive plate boundaries (Over 80% of the worlds volcanoes occur at these boundaries) for example the eruption of the Nevado del Ruiz in Colombia on the 13th November in 1985 which killed over 25000 residents of Arenas and Armero. At destructive plate margins, the oceanic crust is denser than continental crust and is therefore subducts under the continental crust. 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 .
Geologic Summary. The high, isolated massif of Shiveluch volcano (also spelled Sheveluch) rises above the lowlands NNE of the Kliuchevskaya volcano group and forms one of Kamchatka's largest and most active volcanoes. The currently active Molodoy Shiveluch lava-dome complex was constructed during the Holocene within a large breached caldera formed by collapse of the massive late-Pleistocene Strary Shiveluch volcano. At least 60 large eruptions of Shiveluch have occurred during the Holocene, making it the most vigorous andesitic volcano of the Kuril-Kamchatka arc. Frequent collapses of lava-dome complexes, most recently in 1964, have produced large debris avalanches whose deposits cover much of the floor of the breached caldera.
Japan is well known for being particularly amenable to subduction zone earthquakes, with huge pressures brought to bear by the sticking tectonic plate zones nearby it, and the slipping results in many earthquakes, some of them very big for instance the Tohoku earthquake. The Tohoku earthquake of March 11, 2011 also referred to as the Great East Japan Earthquake in Japan was one of the most powerful earthquakes that ever hit Japan and worldwide it’s recorded as the fifth most powerful earth quake. The earthquake triggered powerful tsunami waves that resulted into 15,883 deaths, 6,149injured and 2,652 people missing. The earthquake occurred in the north-western Pacific Ocean and lasted for approximately 6minutes. Initially, the earthquake was reported as having a 7.9magnitude (MW) and later it was raised to 8.8 then 8.9MW and finally to 9.0MW.
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?