[cig-commits] r21216 - seismo/3D/SPECFEM3D_GLOBE/trunk/src/specfem3D

[dkomati1 at geodynamics.org]

Author: dkomati1
Date: 2013-01-08 06:58:45 -0800 (Tue, 08 Jan 2013)
New Revision: 21216

Modified:
   seismo/3D/SPECFEM3D_GLOBE/trunk/src/specfem3D/prepare_timerun.f90
Log:
added a comment about the factor of 2 in the scaling used to shift "mu" to the right frequency in the Earth model used


Modified: seismo/3D/SPECFEM3D_GLOBE/trunk/src/specfem3D/prepare_timerun.f90
===================================================================
--- seismo/3D/SPECFEM3D_GLOBE/trunk/src/specfem3D/prepare_timerun.f90	2013-01-07 15:44:21 UTC (rev 21215)
+++ seismo/3D/SPECFEM3D_GLOBE/trunk/src/specfem3D/prepare_timerun.f90	2013-01-08 14:58:45 UTC (rev 21216)
@@ -626,7 +626,11 @@
   ! anelasticity: implications for seismology and mantle composition,
   ! Geophys. J. R. Astron. Soc., vol. 47, pp. 41-58 (1976)
   ! and in Aki, K. and Richards, P. G., Quantitative seismology, theory and methods,
-  ! W. H. Freeman, (1980), second edition, sections 5.5 and 5.5.2, eq. (5.81) p. 170
+  ! W. H. Freeman, (1980), second edition, sections 5.5 and 5.5.2, eq. (5.81) p. 170.
+  ! Beware that in the book of Aki and Richards eq. (5.81) is given for velocities
+  ! while we need an equation for "mu" and thus we have an additional factor of 2
+  ! in the scaling factor below and in equation (49) of Komatitsch and Tromp, Geophys. J. Int. (2002) 149, 390-412,
+  ! because "mu" is related to the square of velocity.
 
   ! rescale in crust and mantle