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Earthquakes

Earthquakes. The parts of a earthquake.

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Earthquakes

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  1. Earthquakes

  2. The parts of a earthquake • First there are body waves, which are seismic waves that travel in the ground, first from the focus, or the starting point of the earthquake. Above the body waves, just under the earth's surface, travel the slower-moving surface waves. This is what shakes the ground violently and cause us to feel the quake's intensity. When the quake is over, aftershock occurs; a tremor or a small quake following a large one.

  3. Seismic waves • Seismic waves are waves that are a result of earthquake activity in the earth. There are body and surface waves. Body waves happen inside the earth. Surface waves happen on the Earth's surface and are called Rayleigh and Love waves. 

  4. How is an earthquake measured? The magnitude of most earthquakes is measured on the Richter scale, invented by Charles F. Richter . The Richter magnitude is calculated from the amplitude of the largest seismic wave recorded for the earthquake, no matter what type of wave was the strongest. It is up to a scale of 1-10 of how strong the earthquake is in that area.

  5. What is a tsunamis • Tsunami's are caused by the earth moving deep underwater. Often this movement is caused by earthquakes. The movement causes waves in the water. These stay under the surface until they approach the more shallow waters of a coastline. They then rise up and out of the water as they move onto the land.

  6. Earthquakes safety • Have an earthquake readiness plan. • Consult a professional to learn how to make your home sturdier, such as bolting bookcases to wall studs, installing strong latches on cupboards, and strapping the water heater to wall studs. • Locate a place in each room of the house that you can go to in case of an earthquake. It should be a spot where nothing is likely to fall on you. • Keep a supply of canned food, an up-to-date first aid kit, 3 gallons of water per person, dust masks and goggles, and a working battery-operated radio and flashlights. Stand next to door ways because does are the toughest things to be under.

  7. How are earth quakes predicted • They may also use laser scanning equipment which can measure changes in the ground shape or by using a special form of radar and a technique. This process essentially involves the use of a radar to create a series of very accurate relief maps of the ground surface over time and then to compare the maps to create a final plot showing the changes between them which is a record of the land surface deformation. 

  8. resources • All pictures are from google images earthquakes • Help from science note book • http://earthquake.usgs.gov/learn/kids/

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