EESA06H3 Lecture Notes - Lecture 3: Rayleigh Wave, Wave Propagation, Epicenter
14 Feb 2016
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Eesa06- lecture 3- probing the earth"s deep interior. Earthquakes map the interior of the planet. Heat flow and gravity methods deep structure. Types of tectonic plates and plate margins divergent, convergent & transform. Earthquakes can be as deep as 700 kilometers below the ground. Sometimes they are shallow as they have the breakage of rock, after 700 kilometers the rocks are not brittle, they are hot and mushy and cannot be broken. 1891 nobi earthquake in japan: earthquakes were produced due to force and would have scarp, offset in the land (around 6m) Primary: surface waves, do most damage, fastest, violent wave motion, 7km/s velocity. Secondary: second type to be received travel 5km/s maximum (varies depending of the material of the rock, density, etc) Wave paths can be direct origin to seismic station or. Retracted path go through more dense material (faster)
