caa a22 4500 477047068 CHVBK 20180405111333.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF00874582 doi (NATIONALLICENCE)springer-10.1007/BF00874582 Simões-Filho Ivan UNICAMP/IG/AGP, C.P. 6152, 13084-100, Campinas, SP, Brasil aut Birefringence parameters: Indicators of anisotropic symmetry systems [Elektronische Daten] [Ivan Simões-Filho] The difference in travel times between split shear waves (travel-time splitting) in anisotropic media depends on nine combinations of the density normalized elastic parameters (the birefringence parameters). These combinations are all zero in isotropic media, where there is no shear-wave splitting. The number of nonzero birefringence parameters increases with decreasing symmetry elements in the medium: from one in cubic media to nine in triclinic media. The birefringence parameters may be recovered from travel-time splitting observations. Their azimuthal behavior may then be interpreted in terms of crack orientation (strike and dip directions). Birkhäuser Verlag, 1996 Birefringence parameters nationallicence weak elastic anisotropy nationallicence shear-wave travel-time delay nationallicence anisotropic symmetry systems nationallicence pure and applied geophysics Birkhäuser-Verlag 148/3-4(1996-09-01), 625-635 0033-4553 148:3-4<625 1996 148 24 https://doi.org/10.1007/BF00874582 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00874582 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Simões-Filho Ivan UNICAMP/IG/AGP, C.P. 6152, 13084-100, Campinas, SP, Brasil aut NATIONALLICENCE 773 0- pure and applied geophysics Birkhäuser-Verlag 148/3-4(1996-09-01), 625-635 0033-4553 148:3-4<625 1996 148 24 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer