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Effect of crustal structure on rayleigh waves generated by atmospheric explosions
Author(s) -
Harkrider David G.,
Flinn Edward A.
Publication year - 1970
Publication title -
reviews of geophysics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 8.087
H-Index - 156
eISSN - 1944-9208
pISSN - 8755-1209
DOI - 10.1029/rg008i003p00501
Subject(s) - geology , seismogram , amplitude , rayleigh wave , attenuation , atmosphere (unit) , rayleigh scattering , seismology , geophysics , thermal , magnitude (astronomy) , range (aeronautics) , atmospheric sciences , surface wave , physics , meteorology , astrophysics , optics , materials science , composite material
Theoretical seismograms are calculated at a teleseismic distance from atmospheric sources over oceanic and continental earth models. Vertical surface displacements of the fundamental and first higher‐mode Rayleigh waves are obtained for each of the models. Source altitudes range from 0.3 to 4.88 km for a 1‐kiloton nuclear explosion in a stratified thermal atmosphere. At 20‐sec period, an explosion over the oceanic model exhibits amplitudes an order of magnitude greater than the equivalent amplitudes from an explosion of the same burst height and yield over any of the three continental structures. If the differences in anelastic attenuation over the paths are included, this effect will be reversed at large enough distances.