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Published August 1970 | Published
Journal Article Open

Effect of crustal structure on Rayleigh waves generated by atmospheric explosions


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.

Additional Information

© 1970 American Geophysical Union. Typescript received December 18, 1968; revised July 23, 1969. This research was supported at Brown University by the Advanced Research Projects Agency and was monitored by the Air Force Office of Scientific Research under contract AF-F44620-68-C-0082. This research was partly supported at Geotech by the Advanced Research Projects Agency, Nuclear Test Detection Office, under Project VELA-Uniform and was under technical direction of the Air Force Technical Applications Center under contract F33657-68-C- 0945.

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