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Seismic Body Waves

Seismic Body Waves. Seismic Surface Waves. 3-D Grid for Seismic Wave Animations.

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Seismic Body Waves

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  1. Seismic Body Waves

  2. Seismic Surface Waves

  3. 3-D Grid for Seismic Wave Animations No attenuation (decrease in amplitude with distance due to spreading out of the waves or absorption of energy by the material) dispersion (variation in velocity with frequency), or anisotropy (velocity depends on direction of propagation) is included.

  4. Comparison of wave animations with wave motion recorded on seismograms Map of west central South America showing historical seismicity (M6+, 1990-1999), epicenter of M6.5 earthquake off the west coast of Chile, and location of GSN seismograph station NNA (Nana, Peru)

  5. Three-component seismograms for the M6.5 west coast of Chile earthquake recorded at NNA

  6. Earth cross section and approximate ray path for direct P- and S-waves for a propagation distance of ~18 degrees

  7. Particle motion diagrams for specific wave arrivals for the NNA seismograms (arrows show approximate propagation [ray path] direction; numbers indicate successive times in the wave arrival)

  8. 3-D particle motion diagram for the first P wave arrival for the NNA seismograms (arrow shows approximate propagation direction [ray path]; numbers indicate successive times in the wave arrival)

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