Planet Interior1

Planet Interior1 - Planet Interiors For the terrestrial...

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Planet Interiors For the terrestrial planets, the most useful data comes from seismology ---the study of the interior from observations of how seismic waves (``planetquake'' waves) travel through the interior. Seismic waves slightly compress rock or cause it to vibrate up and down. They are produced when parts of a planet's crust suddenly shift and can be felt on the surface as a quake. These quakes have been studied extensively on the Earth, so I will focus on the use of earthquakes in what follows but remember that the same principles can be applied on any solid surface where instruments, called seismometers, are placed to study the jolts. Seismometers were left on the Moon by the Apollo astronauts and the Viking 2 lander on Mars had a working seismometer but persistent buffeting by the martian winds prevented it from being able to definitely detect any marsquakes (the seismometer on Viking 1 did not work). No seismometers have been placed on Venus or Mercury. The speed, amplitude, and direction the seismic waves move depend on the particular type of
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

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Planet Interior1 - Planet Interiors For the terrestrial...

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