Bulletin of the Seismological Society of America
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Bulletin of the Seismological Society of America; June 1967; v. 57; no. 3; p. 443-446
© 1967 Seismological Society of America
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Scale-model study of refraction along an irregular interface

B. F. HOWELL, Jr. and T. G. BAYBROOK

DEPARTMENT OF GEOLOGY AND GEOPHYSICS COLLEGE OF EARTH AND MINERAL SCIENCES THE PENNSYLVANIA STATE UNIVERSITY, UNIVERSITY PARK, PENNSYLVANIA 16802

Abstract

An irregular boundary scatters waves refracted along it, acting as a low-pass filter. This effect is similar to that produced by refraction along an intermediate velocity layer or by a linear-gradient transition zone. Such scatter could explain why reflections from the Mohorovicic discontinuity are hard to record. If this is the case, they should be easier to record if frequencies above 5 cps are filtered out of the seismogram.




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Y. NAKAMURA
Head waves from a transition layer
Bulletin of the Seismological Society of America, June 1, 1968; 58(3): 963 - 976.
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