“100% exciting!”

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“100% Exciting!”. Izmit Turkey Seismogram. Granite (and Average Continental Crust). 6.0 km/sec. 2.5 km/sec. 3.5 km/sec. 3.0 km/sec. Differences in density and other physical properties affect the velocity of seismic waves. Oceanic Crust: P-wave Velocity = 7 km/sec “Basalt”. - PowerPoint PPT Presentation

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  • 100% Exciting!

  • Izmit Turkey Seismogram

  • Differences in density and other physical properties affect the velocity of seismic waves.Granite (and Average Continental Crust)6.0 km/sec3.5 km/sec2.5 km/sec3.0 km/sec

  • Continental Crust:P-wave Velocity = 6 km/secGraniteOceanic Crust:P-wave Velocity = 7 km/secBasalt

  • Crust6-7 km/secMantle8-13 km/secOuter Core8-10 km/secInner Core10-11 km/secP-wave Velocities

  • speed of light in a vacuum = 300,000,000 m/s

    speed of light in glass = 200,000,000 m/s

    From:www.what-is-the-speed-of-light.com

  • SlowSlowFastFast

  • DDTDistanced measured in degrees from epicenter.Travel-time versus Distance Curves

  • DDistanced measured in degrees from epicenter.Travel-time versus Distance Curves

  • P-wave reflected from Core-Mantle BoundaryPcP

  • FastSlow

  • SlowFast

  • SlowFast

  • MohoAndrija MohorovicicZagreb Seismological Observatory1909

  • MohoAndrija MohorovicicZagreb Seismological Observatory1909

  • Inner Core discovered by Inge Lehmann in 1936

    Copenhagen Seismological Observatory

  • Inner Core discovered by Inge Lehmann in 1936

    Copenhagen Seismological Observatory

  • Low Velocity Zone in Upper Mantle

  • Low Velocity Zone in Upper MantleLow Velocity Zone = Asthenosphere of Plate Tectonics

  • Mechanism of Plate Tectonics

  • Crust6-7 km/secMantle8-13 km/secOuter Core8-10 km/secInner Core10-11 km/secP-wave Velocities

  • A Must-See Movie!

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