Notes - frequency Earthquakes occur in distinct belts 90%...

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03:15 Theory : PLATE TECTONICS Paradigm Shift: describes a change in an overarching idea or concept that  explains everything about something  Ex: Gregor Mendel: Father of Genetics  Mendel’s idea on genetics Idea: Continents Shifting The idea of plate tectonics started with a lot of doubt   Now, 99% scientists  believing and accepting the idea of plate tectonics Abyssal Plain is 5km Deep Earthquake Belts: Earthquake   shaking of the earth Are caused by slip of the blocks on either side of a fault past each other that  occurs  fast enough  (km/sec) to generate seismic waves, which cause the  shaking we feel SEE DIAGRAM 2   Focus  or  Hypocenter –the point at which the blocks start shifting from each  other  Directly below the Epicenter
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Basic Observation: Eqs don’t occur everywhere on the planet with equal 
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Unformatted text preview: frequency Earthquakes occur in distinct belts 90% of energy released in Eqs occurs around the rim of the Pacific Ocean Bathymetry—depth to / topography of sea floor Study of underwater depth of sea floor Oceanic Mountain Change East Pacific Rise (Rise of Mountain Chains in the Oceans, every ocean has a ridge or rise) Divergent Plate Boundary SEE DIAGRAMS Eqs. occur at ridge crests and along fracture zones These eq. Are shallow focus (typically less than or equal to 5 km) Ex: Mid-Atlantic Ridge Direct Correspondence between wide belts of earthquakes and oceanic trenches Andes: Made of Andesites, all volcanoes, lava rock Correspondence between live volcanoes and earthquake belts 03:15 03:15...
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This note was uploaded on 10/06/2010 for the course GEOL 240Lxg at USC.

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Notes - frequency Earthquakes occur in distinct belts 90%...

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