pure and applied geophysics

, Volume 64, Issue 1, pp 19–30 | Cite as

Propagation ofSn andPn to teleseismic distances

  • Markus Båth
Article

Summary

Sn andPn waves propagated to teleseismic distances are investigated by means of short-period seismograph records of the Swedish network.Sn is found in the distance range of 2400 to 4600 km andPn in the range 3500 to 3900 km, but only provided the path is exceptionally homogeneous. Almost all paths are restricted to the Russian platform. There are probably very few areas in the world offering similar propagation paths. The velocities just under the Mohorovičić discontinuity are found to be 4.72 km/sec and 8.26 km/sec for transverse and longitudinal waves respectively. In addition, other properties of the teleseismicSn andPn are investigated, such as periods, dispersion, amplitudes, particle motions, propagation mechanisms, and comparisons are made withPa, Sa, withLi, Lg1, Lg2 and withP. The fact that teleseismicPn occurs much more seldom than teleseismicSn could be explained by different velocity profiles just under the crust.

Keywords

Longitudinal Wave Velocity Profile Propagation Mechanism Particle Motion Propagation Path 

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Copyright information

© Birkhäuser Verlag 1966

Authors and Affiliations

  • Markus Båth
    • 1
  1. 1.Seismological InstituteUppsalaSweden

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