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Earthquakes. On March 28th, 1964 an earthquake with a magnitude of 9.2 hit Anchorage, Alaska, leaving 131 people dead. This would soon be known as the most powerful earthquake in U.S. history. This was called the Great Alaska Earthquake.

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Introduction

Rachel Edson Earthquakes An earthquake is a shaking of the ground caused by a sudden breaking and movement of tectonic plates of the earth's rocky outermost crust. The edges of these tectonic plates are marked by faults. Most earthquakes occur along the fault lines when the plates slide past each other or collide against each other. The shifting masses send out shock waves that can be powerful enough to alter the surface of the Earth, thrusting up cliffs and opening great cracks in the ground and? cause great damage. This damage includes the collapse of buildings and other man-made structures, broken power and gas lines, landslides, snow avalanches, tsunamis, and volcanic eruptions. On March 28th, 1964 an earthquake with a magnitude of 9.2 hit Anchorage, Alaska, leaving 131 people dead. This would soon be known as the most powerful earthquake in U.S. ...read more.

Middle

After periods of tens to hundreds of years, this compression is relieved by the sudden southeastward motion of portions of coastal Alaska as they move back over the subducting Pacific plate. The Alaska Earthquake was a subduction zone (the plates moved together) earthquake, caused by an oceanic plate sinking under a continental plate. As a result of the 1964 quake, the Latouche Island area moved about 18 meters to the southeast. Also, the patterns of uplift and subsidence which had been slowly developing before the earthquake were suddenly reversed, with areas around Montague Island being uplifted 4-9 meters and areas around Portage down-dropped as much as 3 meters. The line separating the uplift and subsidence zones extended from near the epicenter in Prince William Sound to the SE coast of Kodiak Island. This vertical deformation affected and area of approximately 250,000 km2. ...read more.

Conclusion

Doing these things has prevented much damage for many people. As long as people follow simple procedures like getting away from buildings as soon as possible during an earthquake, they will know how to handle earthquakes in the future and it will prevent many deaths and much damage can also be prevented when keeping in mind the natural disaster of your area. When an earthquake warning is given you should take advantage of it, by preparing for what is about to occur. People who live in earthquake prone areas usually have heavy things strapped down in their houses and can have simple things on hand in case of an earthquake warning. These items include: a flashlight, water, a portable radio, and some canned goods. As long as you keep things on hand in case of emergency, it really isn't any different living in an earthquake area than any other place! The amount of aftershocks(white circles) after the 1964 Alaskan Earthquake The Magnitude Depth of the 1964 Earthquake throughout Alaska ...read more.

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