pure and applied geophysics

, Volume 66, Issue 1, pp 16–24 | Cite as

An earthquake with exceptionally strong higher-mode surface waves

  • Markus Båth
Article
  • 27 Downloads

Summary

An earthquake in the Northern Sinkiang Province, China, on November 13th, 1965, produced exceptionally strong higher-mode surface waves recorded at the Swedish seismograph stations, especially by the Galitzin seismographs at Kiruna. Group-velocity dispersion curves are deduced for the second Rayleigh and the second and third Love wave modes. The energy content of the second Rayleigh and Love modes is computed, and it is found that the former amounts to about 70 times as much as in average. Various reasons for this exceptional behaviour are discussed, such as depth extent of focus, focal mechanism and properties of propagation path.

Keywords

Surface Wave Dispersion Curve Energy Content Focal Mechanism Propagation Path 

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Copyright information

© Birkh#x00E4;user Verlag 1967

Authors and Affiliations

  • Markus Båth
    • 1
  1. 1.Seismological InstituteUppsalaSweden

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