[CIG-SEISMO] Anelastic effects in Mineos

[David Al-Attar]

Dear Wolfgang,

Yes, I believe you are correct. If you see the PREM paper of Dziewonski 
and Anderson (1981) you can find some more details about the 
parametrization mineos uses, including a discussion of the bulk and 
shear quality factors, and the treatment of transverse isotropy.

Best wishes,

David Al-Attar

On 23/05/16 09:43, Wolfgang Szwillus wrote:
> Hi!
> How does Mineos account for anelastic effects on seismic velocity? In 
> Karato(1993) the equation is:
> V = V0 * (1 + 1/(Q*pi) * \ln \omega \tau )
> Where Q is (frequency independent) quality factor, \tau is relaxation 
> time and \omega is the period.
> In line 548 of minos_bran.f I found this:
> fct=2.d0*dlog(tref*wdim)/pi
> this variable "fct" appears together with Q in many places,  which 
> leads to believe, that the expression of Karato is in fact used. Is 
> this correct?
> Many thanks,
> Wolfgang
>
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