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earthquake

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by

cyriac cherian

on 22 October 2013

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Transcript of earthquake

How an earthquake occurs
The Earth had four major layers: the inner core, the outer core, mantle and the crust. The crust and the top of the mantle make up a thin skin in the surface of our planet. But this skin is not all in one piece. It is made up of many pieces like a puzzle covering the surface of the Earth. These puzzle pieces slowly keep moving around, sliding past one another and bumping into each other. We call these puzzle pieces tectonic plates and the edges are called the plate boundaries. These plate boundaries are made up of many faults and most of the earthquakes happen there. Since the edges of the plates are rough, they get stuck while the rest are moving. Finally when the plate have moved far enough, the edges detach on one of the faults and then an earthquake happens.
What an earthquake could do
An earthquake could cause buildings and bridges to collapse, landslides may occure, cracks could appear in the ground, utility poles could fall off cutting off electricity and telephones services, gas lines could burst causing major fires and an earthquake could cause floods to happen.
What an earthquake
will do
What an earthquake will do depends on what area it hits. If an unpopulated region is struck, there will be low loss of life or property. If it hits a large city, there will be many injuries and lots of destructions. Also earthquakes will cause a lot of mess.
Earthquakes are sudden and violent shakings of the ground, sometimes causing great destruction, as a result of movements within the earth's crust. The size or magnitude of earthquakes is determined by measuring the amplitude of the seismic waves recorded on a seismograph. Earthquakes, also called temblors, can be tremendously destructive. The study of earthquakes is called seismology. Seismology studies the frequency, type and size of earthquakes.Most earthquakes occur around the "Ring of Fire" because of the volcanic activity there.A quake measuring 3-5 is considered minor or light; 5-7 is moderate to strong; 7-8 is major, and 8 or more is great.A magnitude of 8.6 earthquake releases energy equivalent to about 10 000 atomic bombs!


Survival Kit
For the survival kit you will need a flashlight with several batteries, a first- aid kit, water, food, can opener, dry food, canned food, blanket, several extra clothings and shoes, items for personal hygiene, communication services and a large container to keep all of the items in.
Safety tips:
Keep a supply of canned food, an up-to-date first aid kit, water per person, a working battery-operated radio , flashlights.
Drop down, take cover under a desk or table and hold on.
Stay indoors until the shaking stops and you're sure it's safe to exit.
Stay away from bookcases or furniture that can fall on you.
Stay away from windows.
Full transcript