[CIG-SEISMO] attenuation in SH fase

[Anton Gulley]

I am a PhD from the University of Auckland, New Zealand and I hope to use
specfem to simulate some synthetic seismograms in a fault zone.
I am using specfem2D and the most important faze is the SH fase.
Attenuation is also very important.
I am wondering if it is likely that attenuation will be added in the future along with pml boundary conditions to the SH FASE. 
Or dose anyone have any other suggestions on other code ect.

Thanks very much
Anton Gulley