Essay on Plate Tectonics Press Release

741 Words Aug 4th, 2012 3 Pages
Plate Tectonics Press Release

GLG/101

July 13, 2012

Plate Tectonics Press Release

Hello everyone, my name is John doe and I am the Director of Earthquake Preparedness’ for Los Angles. I am here today to talk to your about earthquake preparedness. During this press release I will be describing the hazards associated with earthquakes in Los Angeles. I will discuss the origin and causes of earthquakes and the relation of earthquakes to plate tectonics and faults in Los Angeles. Historical disasters associated with past earthquakes and potential earthquakes in the future. Earthquakes are caused when tension is released from the rocks in the Earth’s crust and upper mantle. This tension is due to friction between what
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Then on January 17, 1994, a 6.7 earthquake hit the Northridge area. This earthquake caused 87 deaths and a FEMA – estimated $40 billion in property damage. An estimated 12,000 people were injured, and 100,000 structures were damaged. More than 600,000 individuals applied for disaster assistances. When dealing with earthquakes, there are many hazards associated with this event like ground motion, aftershocks, fires, tsunami, and flooding. Ground motion is when the shaking of the ground causes the passage of seismic waves, especially surface waves, near the epicenter of the earthquake. Ground motion is responsible for the most damage during an earthquake and is thus a primary effect of an earthquake. Aftershocks are smaller earthquakes that occur after a main earthquake, and in most causes there are many of these. Fire is a hazard of earthquakes, because power lines may be knocked down and natural gas lines may rupture due to an earthquake. Fires are often started closely following an earthquake. Tsunami is another hazard of earthquakes. They are giant ocean waves that can rapidly travel across oceans. Earthquakes that occur beneath sea level and along coastal areas can generate tsunami, which can cause thousands of miles away on the other side of the world. Flooding is a hazard that may occur due to rupture of human made dams and levees, due to tsunami, and as a result of ground subsidence after an earthquake. According to a report released,

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