5. seismology and plate tectonicsseismo.snu.ac.kr/class/seismology/swch5.1-5.4v1.1.pdf · 1 5....
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5. Seismology and Plate Tectonics5. Seismology and Plate Tectonics
• Introduction
• Plate kinematics
• Spreading centers
• Subduction zones
• Ocean intraplate earthquakes and tectonics
• Continental earthquakes and tectonics
• Faulting and deformation in the earth
Plate Tectonics Summary (I)Plate Tectonics Summary (I)
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Plate Tectonics Summary (II)Plate Tectonics Summary (II)
Plate Tectonics Summary (III)Plate Tectonics Summary (III)
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Global SeismicityGlobal Seismicity
Deep SeismicityDeep Seismicity
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Seismicity CrossSeismicity Cross--section (Wadatisection (Wadati--Benioff zone)Benioff zone)
Plate kinematics (Euler pole)Plate kinematics (Euler pole)
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Relative Plate Motion and Plate BoundayRelative Plate Motion and Plate Bounday
Angular and Linear Velocity (I)Angular and Linear Velocity (I)
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Angular and Linear Velocity (II)Angular and Linear Velocity (II)
Relative Plate Motions w.r.t North AmericaRelative Plate Motions w.r.t North America
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PacificPacific--North American Plate BoundaryNorth American Plate Boundary
Global Plate CircuitGlobal Plate Circuit
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Relative Plate MotionsRelative Plate Motions
Current and Historic Plate VelocitiesCurrent and Historic Plate Velocities
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Bend at 43 Ma:
Absolute Plate Motions (I)Absolute Plate Motions (I)
Bend at 43 Ma:
Plate direction change?
Mantle wind?
Moving hot spot base?
Absolute Plate Motions (II)Absolute Plate Motions (II)
Plume?
Ri ht R ll?Richter Roll?
Basin and Range extension?
Propagating Rift?
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Earthquakes at an oceanic spreading centerEarthquakes at an oceanic spreading center
Earthquakes on slow spreading centerEarthquakes on slow spreading center
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Earthquakes on fast spreading centerEarthquakes on fast spreading center
Normal Faulting on slow spreading centerNormal Faulting on slow spreading center
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Cooling of the oceanic plate (I)Cooling of the oceanic plate (I)
Cooling of the oceanic plate (II)Cooling of the oceanic plate (II)
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SubductionSubduction zoneszones
Earthquakes at Earthquakes at subductionsubduction zoneszones
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Double Seismic ZoneDouble Seismic Zone
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Normal Faulting at TrenchesNormal Faulting at Trenches