[CIG-SEISMO] Can SPECEM3D do gravity inversion?

[Dimitri Komatitsch]

Hi all,

Nice!

For gravity modeling, in the current version of SPECFEM3D one needs to 
change the following flag to .true. in setup/constants.h.in :

!!-----------------------------------------------------------
!!
!! gravity integral calculations
!!
!!-----------------------------------------------------------

!! DK DK for gravity integrals
   logical, parameter :: GRAVITY_INTEGRALS = .false. !!! .true.


Best regards,
Dimitri.


On 03/18/2017 05:32 PM, Jeroen Tromp wrote:
> Dear all,
>
> This is something Hom Nath Gharti has worked on as well, combining a
> spectral-element method with an infinite-element method to solve
> Laplace's equation in outer space. See his recent CIG webinar:
> https://www.youtube.com/watch?v=uIuvv7tAcfk
>
> Best regards,
>
> Jeroen Tromp
>
>
> On 3/18/17 12:29 PM, Dimitri Komatitsch wrote:
>>
>> Hi Ming,
>>
>> Thanks for your message! This is indeed an interesting topic. My
>> friend Roland Martin has a nice paper that has just appeared on this:
>> http://komatitsch.free.fr/preprints/GJI_Martin_gravimetry_2017.pdf
>>
>> thus let me cc Roland to see what the current version of SPECFEM3D can
>> do (it can do 3D modeling for sure, but I think the gravity inversion
>> part was performed outside of SPECFEM using scripts for now (?);
>> Roland can tell us more about this, he is the expert on that).
>>
>> Thanks!
>> Cheers,
>> Dimitri.
>>
>> On 03/18/2017 04:08 PM, mzhao at cea-igp.ac.cn wrote:
>>> Hi Dimitri,
>>>
>>> I read a very interesting paper recently which use spectral element
>>> method to do gravity inversion,I wonder if the SPECFEM3D can do gravity
>>> inversion in the future? We have a lot of seismic data and gravity
>>> data in
>>> our group,and I'm using spectral element method all the time,if it can
>>> do both adjoint inversion and gravity inversion, that would be exciting!
>>>
>>> Cheers
>>> Ming Zhao
>>> ------------------------------------------------------------------------
>>> mzhao at cea-igp.ac.cn
>>
>
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-- 
Dimitri Komatitsch, CNRS Research Director (DR CNRS)
Laboratory of Mechanics and Acoustics, Marseille, France
http://komatitsch.free.fr