Re: mag 3d inversion suggestions?

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Dear Ashton,

I have a 3D joint inversion code written in C++ that I could share. It
currently has MT, refraction seismics and gravity and I recently added
total field magnetics (without much testing so far though). It is
quite flexible, so adding an existing surface wave inversion should
not be a major problem.

Walter is making an important point though. Potential field data alone
add little information unless they are strongly constrained. Combining
seismic velocities and susceptibilities in a joint inversion creates a
bit of a dilemma. They are quite different properties so we don't want
to couple the two methods two strongly, but then without strong
guidance from the seismics the magnetic part of the inversion will
very likely do funny things.

I am happy to discuss this further if you are interested.

Regards

Max

On 27/02/14 15:01, andrealphus wrote:
> I was hoping to get peoples input on available open source 3d
> magnetic inversion routines.
> 
> I'm working on a surface wave inversion (ambient seismic noise) 
> problem, but am interested in incorporating an available magnetic 
> dataset - and doing a simaluteanous joint inversion (SJI).
> 
> I'm familiar with MAG3D (UBC), and have heard of GRMAG3D (CEMI),
> but don't know any beyond that. I'm looking for something freely
> available to academia, and open source (so I can modify
> optimization constraints - fortran/c/matlab).
> 
> Any suggestions?
> 
> (I'd like to know whats available before I decide to sit down and
> write my own)
> 
> -ashton
> 
> To unsubscribe, send the message "signoff gmt-help" to
> [email protected]
> 


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