[aspect-devel] Using seismic tomography as an input

HERON, PHILIP J. philip.j.heron at durham.ac.uk
Fri Oct 20 01:37:50 PDT 2017

Hi Paul and John,

Thanks for the replies!

"are you hoping to input seismic tomography models for the express purpose of obtaining a density and gravity model?"

Yes, this is what he is looking to do. Heat flux would be a bonus, too.

I've passed on the information and he is going to download Aspect this afternoon. I think this would be really neat if we can get a working example up and running from this. I'll keep you posted and I (or more than likely he) will drop back in with some questions.

Thanks again,


From: Aspect-devel <aspect-devel-bounces at geodynamics.org> on behalf of Bremner,Paul M <pbremner at ufl.edu>
Sent: 19 October 2017 22:04:30
To: aspect-devel at geodynamics.org
Subject: Re: [aspect-devel] Using seismic tomography as an input

Hi Phil,

I believe a 3D Cartesian model can be input into the ascii plug-in.

I also just want to make sure I understand your purpose correctly, are you hoping to input seismic tomography models for the express purpose of obtaining a density and gravity model? Or are you wanting to simply use the tomography models to feed a density model to ASPECT?

I believe that both the S40RTS and ascii plug-ins assign the temperature field in ASPECT, and not the density. For example, in S40RTS the velocity perturbation at a particular point is converted to density perturbation by multiplying a constant scale factor. That value is then multiplied by 1/alpha to get temperature perturbation, which is added to a background temperature for that point.


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