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PP amplitude bias caused by interface scattering: are diffracted waves guilty? by Nathalie Favretto‐Cristini; Eric De Bazelaire is a Earth and Planetary Sciences article available to read on EtoBox.

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## ABSTRACT This paper is concerned with the problem of interpretation of anomalous seismic amplitudes, induced by the amplitude‐scattering phenomenon. This phenomenon occurs in the vicinity of a crack distribution at the interface between elastic layers. The purpose of this work is to obtain a better understanding of the physics of this distinctive phenomenon, in order to interpret correctly the amplitudes of the reflected events. By analogy with studies in optics and in acoustics, we suggest that diffraction is widely involved in the amplitude‐scattering phenomenon. Analytical evaluation of the amount of energy carried by the reflected and the diffracted waves shows that neglecting diffraction in numerical models leads to local underestimation of the amplitude of waves reflected at interfaces with gas‐filled crack distribution.

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Author

Nathalie Favretto‐Cristini; Eric De Bazelaire

Publisher

John Wiley and Sons; Wiley (Blackwell Publishing); Blackwell Publishing Inc.; Wiley (ISSN 0016-8025)

Published

2003

Language

EN

Field

Earth and Planetary Sciences (Physical Sciences)