Best software for seismic refraction tomography

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Preston09
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Re: Best software for seismic refraction tomography

Post by Preston09 »

My problem with this Geometrics software SeisImager2D is that it's not stable - I guess it has some bugs, maybe with some memory allocation problems or something. Otherwise it should at least be an OK program for me.

The other thing is that it's not easy to convert the tomography result directly into a layered model - it's hard to get a meaning result. I am still working on it and try to get familiar with this function.

kaminae
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Re: Best software for seismic refraction tomography

Post by kaminae »

I guess that diffrer between softwares is
stability of inversion's results
Interface options
Simpleness of using
Working with import/export
Using of apriori information

In formal way softwares gives similar results

ncoord
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Re: Best software for seismic refraction tomography

Post by ncoord »

Good points. Another thing to consider is of course the price :)

resour
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Re: Best software for seismic refraction tomography

Post by resour »

For optimized interpretation of SAGEEP 11 blind refraction session see

http://rayfract.com/tutorials/SAGEEP11_13.pdf

with final tomogram as attached :
Attachments
Smooth inversion after 7 runs 100 WET iterations each, with decreasing wavepath width. Max. WET velocity 3,500 m/s
Smooth inversion after 7 runs 100 WET iterations each, with decreasing wavepath width. Max. WET velocity 3,500 m/s
WET wavepath coverage for above tomogram
WET wavepath coverage for above tomogram
Last edited by resour on Sat Aug 17, 2013 2:56 pm, edited 4 times in total.

resour
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Re: Best software for seismic refraction tomography

Post by resour »

My interpretation with Rayfract(R) 3.25 and pseudo-2D DeltatV starting model :
Attachments
ZondData_par.txt
Complete list of inversion parameters. Renamed from VELOIT100.PAR .
(5.25 KiB) Downloaded 720 times
3layers_par.txt
Complete list of inversion parameters. Renamed from VELOIT100.PAR .
(5.25 KiB) Downloaded 725 times
data.txt input, max. WET velocity 2,500 m/s, CMP intercept time refraction layers overlaid, runtime 3 minutes
data.txt input, max. WET velocity 2,500 m/s, CMP intercept time refraction layers overlaid, runtime 3 minutes
WET wavepath coverage for above tomogram
WET wavepath coverage for above tomogram
seismic3layers_fault.txt input, max. WET velocity 4,000 m/s, XTV inversion for starting model, CMP refraction refractors overlaid, runtime 3 minutes
seismic3layers_fault.txt input, max. WET velocity 4,000 m/s, XTV inversion for starting model, CMP refraction refractors overlaid, runtime 3 minutes
WET wavepath coverage for above tomogram
WET wavepath coverage for above tomogram
data.csv
Rename data.csv to data.asc for Rayfract(R) import. Specify separator "," in File|ASCII column format...
(12.59 KiB) Downloaded 693 times
3layers.csv
Rename 3layers.csv to 3layers.asc for Rayfract(R) import. Specify separator "," in File|ASCII column format...
(3.31 KiB) Downloaded 756 times
Last edited by resour on Tue Aug 20, 2013 3:48 am, edited 4 times in total.

Preston09
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Re: Best software for seismic refraction tomography

Post by Preston09 »

So Rayfract can also work "blindly" on data, good to know. The results look similar to the results of other programs.

ncoord
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Re: Best software for seismic refraction tomography

Post by ncoord »

It's nice to have another software to compare :lol:

kaminae
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Re: Best software for seismic refraction tomography

Post by kaminae »

Hi guys! Nice to see that this topic is not frozen.
I have some new ideas about non-linear inversion for refraction tomography based on Madden-Mackie approach.
I suppose it can gives better results in comparision with standart inversion.
Alex
But still with opinion that the best way - including of a priori information in inversion.

resour
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Re: Best software for seismic refraction tomography

Post by resour »

My interpretation of P-waves.txt, with 1D-gradient starting model and 100 WET iterations :
Attachments
PWaves_par.txt
Complete list of inversion parameters. Renamed from VELOIT100.PAR .
(5.26 KiB) Downloaded 726 times
coords.csv
Rename to COORDS.COR for Rayfract(R) File|Update header data|Update Station Coordinates...
(406 Bytes) Downloaded 704 times
p-waves.csv
P-waves.txt formatted as Rayfract(R) .ASC . Rename .CSV to .ASC before import, specify column separator "," in File|ASCII column format...
(3.66 KiB) Downloaded 720 times
P-waves.txt input, 1D-gradient starting model, Wavefront method refractor overlaid. Runtime 2 minutes.
P-waves.txt input, 1D-gradient starting model, Wavefront method refractor overlaid. Runtime 2 minutes.
WET wavepath coverage for above tomogram
WET wavepath coverage for above tomogram
Last edited by resour on Tue Aug 20, 2013 3:51 am, edited 1 time in total.

resour
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Re: Best software for seismic refraction tomography

Post by resour »

And here my S-waves.txt interpretation, also with 1D-gradient starting model and 100 WET iterations, wavepath width 20% :
Attachments
SWaves_par.txt
Complete list of inversion parameters. Renamed from VELOIT100.PAR .
(5.26 KiB) Downloaded 713 times
s-waves.csv
Rename .CSV to .ASC for Rayfract(R) import. Specify colum separator "," in File|ASCII column format...
(3.41 KiB) Downloaded 684 times
S-waves.txt input, 1D-gradient starting model, CMP intercept-time refractors overlaid, WET runtime 3 minutes.
S-waves.txt input, 1D-gradient starting model, CMP intercept-time refractors overlaid, WET runtime 3 minutes.
WET wavepath coverage for above tomogram
WET wavepath coverage for above tomogram

Preston09
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Re: Best software for seismic refraction tomography

Post by Preston09 »

It's impressive to have such good results on ground surfaces with highly topographic change!

resour
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Re: Best software for seismic refraction tomography

Post by resour »

For updated .pdf showing 1D-gradient starting model obtained with 1.5D DeltatV inversion and horizontal averaging and 2D Conjugate Gradient Fresnel volume tomography see

http://rayfract.com/tutorials/ZONDDATA.pdf
Last edited by resour on Tue Jun 24, 2014 7:17 pm, edited 1 time in total.

kaminae
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Re: Best software for seismic refraction tomography

Post by kaminae »

One more synthetic example. Very interesting.
Attachments
ZondData2.txt
SRT file
(40.17 KiB) Downloaded 678 times

resour
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Re: Best software for seismic refraction tomography

Post by resour »

For a comparison of our Smooth inversion/WET tomography with other algorithms, based on SAGEEP 2011 blind refraction data see

Blind Test of Methods for Obtaining 2-D Near-Surface Seismic Velocity Models from First-Arrival Traveltimes (Colin Zelt et al., JEEG Sep 2013)

http://dx.doi.org/10.2113/JEEG18.3.183

kaminae
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Re: Best software for seismic refraction tomography

Post by kaminae »

Any results on zonddata2? A small trick in this model.

muroinho007
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Re: Best software for seismic refraction tomography

Post by muroinho007 »

best is your codes if u can write use matlab for this

http://geophysicscience.blogspot.com/20 ... ysics.html

and an example for 3d masw codes on matlab writed by myself. good luck.


http://geophysicscience.blogspot.com/2013/03/masw.html

resour
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Re: Best software for seismic refraction tomography

Post by resour »

For our SAGEEP14 expanded abstract see

http://rayfract.com/pub/sageep14.pdf

resour
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Re: Best software for seismic refraction tomography

Post by resour »

For optimized interpretation with our Conjugate Gradient Fresnel volume tomography see updated

http://rayfract.com/tutorials/ZONDDATA.pdf

. See below for the final tomogram. We used a square cell sized 0.57m by 0.57m, resulting in a grid size of 41 rows vs. 183 columns and 7,503 nodes.

WET inversion time was 20 seconds on a MacBook Air running Windows 7 in Parallels Desktop 8 using 4 CPU cores in parallel, for inversion of 421 synthetic traveltimes.
Attachments
ConjugateGradient_142WETIters.png

peterkunbo
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Re: Best software for seismic refraction tomography

Post by peterkunbo »

Hi. I would like to use Kaminae synthetic data for my research. I will appreciate it if you can provide me with your full name or a link to your homepage if you have one so that I can do proper acknowledgement in publication.

kaminae
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Re: Best software for seismic refraction tomography

Post by kaminae »

Hi Peter!
Details of mine:
Alex Kaminsky. Zond software ltd.
www.zond-geo.ru/english
zondgeo@gmail.com

peterkunbo
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Re: Best software for seismic refraction tomography

Post by peterkunbo »

Thank you Alex (Kaminae).

lecxis
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Re: Best software for seismic refraction tomography

Post by lecxis »

Hello guys, Please I have the Zone software for seismic and electrical resistivity. The problem is I don't know how to use it. the manual that came with it is in Russian( I guess). Can anyone help with a tutorial link or a manual written in English. thanks

kaminae
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Re: Best software for seismic refraction tomography

Post by kaminae »

Hi
Did You checked software's folder for zondres2d_eng.pdf and zondst2d_eng.pdf?

lecxis
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Re: Best software for seismic refraction tomography

Post by lecxis »

The manual I saw in both types were written in Russian. I would appreciate it if you can help me with the English version.

kaminae
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Re: Best software for seismic refraction tomography

Post by kaminae »

zondres2d_eng.pdf inside next archive:
http://zond-geo.ru/zfiles/Zondres2d.zip

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