Plate Tectonics Lesson 4. Big Idea: How Do Earthquake’s Affect Earth’s Surface?. Earthquakes?. If you were holding a ruler at both ends and put pressure on both ends at the same time, the ruler will bend slightly. If you press very hard, the ruler will snap in two.
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How Do Earthquake’s Affect Earth’s Surface?
If you were holding a ruler at both ends and put pressure on both ends at the same time, the ruler will bend slightly. If you press very hard, the ruler will snap in two
An EARTHQUAKE is a release of energy at a fault that causes Earth’s crust to shake.
The focus is the point inside Earth where the crust slips and releases energy.
The epicenter is the point on the Earth’s surface directly above the focus.
P waves are primary waves and they move with the greatest speed.
S waves are secondary waves and can move up and down or side to side. Their movement looks somewhat like the letter S.
Surface waves travel along the Earth’s surface. They can most of the damage to buildings in an earthquake.
An earthquakes’ magnitude is the amount of energy it releases.The Richter Scale
Earthquake damage 100 km from the epicenter
the epicenterEarthquake damages 200 kilometers from the epicenter:
Countries such as Japan that are surrounded by water have greater damage
Softer ground shakes more than harder ground