[CIG-SEISMO] using SPECFEM3D fot simulating gravity perturbation / PS

[Dimitri Komatitsch]

Done!

Dimitri.

On 04/09/2018 12:06 PM, Dimitri Komatitsch wrote:
> 
> Dear Surendra, dear all,
> 
> Thanks a lot! I will add your paragraph below to the users manual in a 
> few minutes. Very useful.
> 
> Best regards,
> Dimitri.
> 
> On 04/04/2018 08:23 PM, Surendra Nadh Somala wrote:
>> Dear Dimitri,
>>
>> I think Yixin Yao is looking for a feature that I had implemented 
>> during my Caltech days (way back in 2013) but never made it to manual, 
>> although it is still in the master github repository of Specfem3D.  We 
>> had a publication eventually on it in 2015 whose link is given below:
>> https://authors.library.caltech.edu/58337/1/Geophys.%20J.%20Int.-2015-Harms-1416-25.pdf 
>>
>>
>> The title of that article: "Transient gravity perturbations induced by 
>> earthquake rupture" sounds more like what Yixin Yao asked for in the 
>> first email.
>>
>> The only documentation we currently have for this feature is in a 
>> standalone README file that can be found here:
>> doc/how_to/README_gravityPerturbation_bis.txt 
>> <https://github.com/geodynamics/specfem3d/blob/ff24d4062e223aa976c338b45fd4eb568ad1558a/doc/how_to/README_gravityPerturbation_bis.txt> 
>>
>>
>> Could you please add a note about this new feature in the manual where 
>> you may feel relevant (probably with a clarification that this differs 
>> from Martin Roland's work on gravity integrals/field calculation) and 
>> request the users of this feature to cite the following article.
>> Harms, J., J.-P. Ampuero, M. Barsuglia, E. Chassande-Mottin, J.-P. 
>> Montagner,S. N. Somalaand B. F. Whiting (2015)/Transient gravity 
>> perturbations induced by earthquake rupture/, Geophysical Journal 
>> International, 201 (3), 1416-1425 doi:10.1093/gji/ggv090
>>
>> Regards,
>> Surendra
>>
>>
>>
>>
>>
>> ___________
>> *Surendra Nadh Somala*
>> Assistant Professor
>> Department of Civil Engineering (Block-E, 208)
>> Indian Institute of Technology (IIT) Hyderabad
>> Kandi, Sangareddy
>> Telangana, India - 502285
>> Phone : +91 (0)40 2301-8457
>> http://civil.iith.ac.in/surendra/
>>
>> On Tue, Apr 3, 2018 at 8:14 PM, Dimitri Komatitsch 
>> <komatitsch at lma.cnrs-mrs.fr <mailto:komatitsch at lma.cnrs-mrs.fr>> wrote:
>>
>>
>>     Dear Yixin Yao,
>>
>>     Please also make sure you get a recent version of the code, for
>>     instance by typing this:
>>
>>     git clone --recursive --branch devel
>>     https://github.com/geodynamics/specfem3d.git
>>     <https://github.com/geodynamics/specfem3d.git>
>>
>>     because the current version of the users manual says this:
>>
>>     "OTHER ANNOUNCEMENT: SPECFEM3D can now perform gravity field
>>     calculations in addition (or instead of) seismic wave propagation
>>     only. See flag GRAVITY_INTEGRALS in file setup/constants.h.in
>>     <http://constants.h.in>.
>>     Please also refer to
>>     http://komatitsch.free.fr/preprints/GJI_Martin_gravimetry_2017.pdf
>>     <http://komatitsch.free.fr/preprints/GJI_Martin_gravimetry_2017.pdf>.
>>     And yes, that is the reason why I added a falling apple on the cover
>>     of the manual :-)"
>>
>>     Best regards,
>>     Dimitri.
>>
>>     On 04/03/2018 04:38 PM, Dimitri Komatitsch wrote:
>>
>>
>>         Dear Yixin Yao,
>>
>>         Thank you for your interest in our work on this. You are right,
>>         by lack of time the gravity integrals are not very well
>>         documented in the users manual, however they are explained in
>>         detail in this paper:
>>         
>> http://komatitsch.free.fr/preprints/GJI_Martin_gravimetry_2017.pdf
>>         
>> <http://komatitsch.free.fr/preprints/GJI_Martin_gravimetry_2017.pdf>
>>
>>         You can also find the flags to use in file setup/constants.h.in
>>         <http://constants.h.in>, there is a section with flags about
>>         gravity integrals, called "gravity integral calculations".
>>
>>         Best regards,
>>         Dimitri.
>>
>>         On 04/02/2018 04:04 PM, yaoyixin1989 at 163.com
>>         <mailto:yaoyixin1989 at 163.com> wrote:
>>
>>             Dear prof.,
>>             I am a PhD student of Institute of Geodesy and Geophysics,
>>             Chinese Academy of Sciences.I am interested in gravity
>>             perturbation caused by an earthquake, and I try to do the
>>             simulation by using SPECFEM3D software. These days, I have
>>             searched the manual clearly, but I didn't find the detailed
>>             discription about gravity perturbation.
>>             What should I do, is there a detailed manual about how to
>>             simulate the gravity perturbation?
>>             Thank you very much for your kind consideration and I am
>>             looking forward to your reply!
>>
>>             Sincerely, yours
>>             Yixin Yao
>>             
>> ------------------------------------------------------------------------
>>             yaoyixin1989 at 163.com <mailto:yaoyixin1989 at 163.com>
>>
>>
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>>
>>
>>     --     Dimitri Komatitsch, CNRS Research Director (DR CNRS)
>>     Laboratory of Mechanics and Acoustics, Marseille, France
>>     http://komatitsch.free.fr
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>>
> 

-- 
Dimitri Komatitsch, CNRS Research Director (DR CNRS)
Laboratory of Mechanics and Acoustics, Marseille, France
http://komatitsch.free.fr