Measuring earthquakes
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Measuring Earthquakes. Definitions. P-wave: (Primary) The first and fastest wave of energy sent out from an earthquake. The wave motion is in the same direction as the energy.

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Measuring Earthquakes

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Measuring earthquakes

Measuring Earthquakes


Definitions

Definitions

  • P-wave: (Primary) The first and fastest wave of energy sent out from an earthquake. The wave motion is in the same direction as the energy.

  • S-wave: (Secondary) The 2nd and slower wave of energy sent out from an earthquake. The wave motion is perpendicular to the direction of the energy.


Definitions1

Definitions

  • Surface wave: The slowest and most destructive wave sent out from an earthquake. The wave motion is in all directions--up/down, side-to-side, back and forth.

  • Focus: The point below the surface where the movement begins from an earthquake

  • Epicenter: The point on the surface above the focus of an earthquake


Seismo graph

Seismograph


Seismo gram

Seismogram


Richter scale

Richter scale


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