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| The limit to how much pressure an object can withstand and still return to its original shape. |
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| A fracture within the Earth where rock movement occurs |
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| [image]
Rock moves along a fracture caused by tension forces |
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http://www.iris.edu/gifs/animations/thrust3.gif
rock is pushed in opposite horizontal directions |
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| [image]
Causes rock to be pushed in opposite horizontal directions. |
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| The pont in the Earth's interior where seismic waves originate.
[image] |
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| The point on the Eart's surface directly above the focus
[image] |
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| Magma flows out through these openings. These opening relieve pressure inside the earth. |
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| result from explosive eruptions |
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P-waves, primary waves, move the fastest
S-waves, secondary waves, slower than primary.
Surface waves also called L-waves, Love waves,named for guy who discovered them, cause the most damage |
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| instrument used to detect and measure earthquake waves |
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| Molten, or hot liquefied, rock located deep below the Earth's surface is called magma. When a volcano erupts or a deep crack occurs in the Earth, the magma rises and overflows. When it flows out of the volcano or crack, usually mixed with steam and gas, it is called lava. |
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| built almost entirely of fluid lava flows |
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| composed of explosive eruptions of thick lava, ash, and rocks. |
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| Houses that absorb and evenly distribute horizontal shifting fare best in an earthquake. By reinforcing the foundation, floors, walls, and roof with metal and concrete you can improve its ability to withstand lateral and vertical forces. |
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