Higher-mode Rayleigh waves studied as individual seismic phases

Emile A. Okal*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


We study a set of very high-quality records of first-order overtone Rayleigh waves from the deep-focus earthquake of September 29, 1973, in the Japan Sea. Standard surface wave techniques are used with these overtones, treated as individual seismic phases, to retrieve radiation pattern, Q, moment and phase velocity. A figure of M0 = (6.7 ± 1.4) × 1027 dyn-cm is obtained, in total agreement with published values computed from either P waves, or fundamental Rayleigh waves. We also demonstrate the feasibility of using overtones as individual seismic phases in order to investigate their dispersion and attenuation properties.

Original languageEnglish (US)
Pages (from-to)162-167
Number of pages6
JournalEarth and Planetary Science Letters
Issue number1
StatePublished - Jan 1 1979

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

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