Abstract
The reason why the synthetic amplitude distance curves of P-waves for models IASP91 and PREM, observed for shallow sources up to epicentral distance of 28°, oscillate is illustrated by means of synthetic seismograms. Furthermore the position of the beginning of the diffraction of the P-wave at the CMB, depending on the prevailing signal period, is discussed in connection with the extension of Fresnel volumes.
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Janský, J., Kvasnička, M. & Duda, S. Discussion of the Features of Synthetic Amplitude-Distance Curves of Teleseismic P Waves for Global Earth Models. Studia Geophysica et Geodaetica 41, 130–148 (1997). https://doi.org/10.1023/A:1023332511236
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DOI: https://doi.org/10.1023/A:1023332511236