On DLA's η
Hitoshi Kawakatsu, Jean-Paul Montagner, Teh-Ru Alex Song, 2015. "On DLA's η", The Interdisciplinary Earth: A Volume in Honor of Don L. Anderson, Gillian R. Foulger, Michele Lustrino, Scott D. King
Download citation file:
In his pioneering 1961 paper on seismic anisotropy in a layered earth, Don L. Anderson (hereafter referred to as DLA) introduced a parameter often referred to in global seismology as η without providing any reasoning. This note hopes to clarify the significance of η in the context of the dependence of body wave velocities in a transversely isotropic system on the angle of incidence, and also its relation with the other well-known anisotropic parameters introduced by Leon Thomsen in 1986.