Open AccessReflected‐diffracted waves in fracture zone models
Author(s) -
Grad Marek
Publication year - 1984
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1984.tb02862.x
Subject(s) - diffraction , geology , amplitude , crust , perpendicular , seismology , fracture (geology) , seismic wave , geophysics , geodesy , optics , geometry , physics , geotechnical engineering , mathematics
Summary. The paper presents the results of modelling of diffracted and reflected‐diffracted waves in fracture zones. The Berryhill method was used and the calculations were made for a profile perpendicular to the diffracting edge. Several homogeneous models of the Earth's crust, characterized by different values of crustal thickness, velocity and horizontal distance between shot point and diffracting edge were considered. A dependence of the relative amplitude of diffracted waves on the location of the diffracting edge is given. The pattern of the seismic wavefield depends upon the dimensions of the fracture zone. Amplitude curves of reflected‐diffracted waves are presented for a series of models of fracture zones. The possibility of applying the amplitudes of reflected‐diffracted wave trains to the interpretation of the structure of fracture zones in the Earth's crust is andysed for different types of fracture zones.