Dispersion of One-Second Rayleigh Modes through Oceanic Sediments Following Shallow Earthquakes in the South-Central Pacific Ocean Basin

  • Emile A. Okal
  • Jacques Talandier
Part of the NATO Conference Series book series (NATOCS, volume 5)


The purpose of this paper is to report the observation of anomalously long wavetrains of high-frequency seismic energy (0.3–1 Hz) following shallow events at a number of epicenters in the South-central Pacific basin, and to model their propagation and generation as due to efficient coupling of the oceanic water column with the solid Earth through a well-developed transitional layer of sediments. The following paragraphs are a short summary of the seismic features of the area, and provide a framework for our study.


Ground Motion Group Velocity RAYLEIGH Wave Seismic Energy Synthetic Seismogram 
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Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • Emile A. Okal
    • 1
  • Jacques Talandier
    • 2
  1. 1.Department of Geology & GeophysicsYale UniversityNew HavenUSA
  2. 2.Laboratoire de GéophysiqueCommissariat à l’Energie AtomiquePapeete, TahitiFrance

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