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HDF5 to Segy conversion
by Bitri Adnand 17 Dec '25

17 Dec '25

Hi, everyone! I'm looking for a code that converts HDF5 data to SEGY. Thanks for your help Regards Adnand

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TR: HDF5 to Segy conversion
by Bitri Adnand 12 Dec '25

12 Dec '25

Hello, The Python code suggested by Khawer below seems to work. Thank you all Adnand De : Khawar Qazi <smartkhawar(a)gmail.com> Envoyé : vendredi 12 décembre 2025 13:28 À : Bitri Adnand <a.bitri(a)brgm.fr> Objet : Re: [Seisunix] HDF5 to Segy conversion HI, try code below: Technically this should work. You should know little about how to handle with python and the code should work. Install segyio, h5py and numpy. Maybe numpy 1.26.4 works here and numpy 2 will not work correctly. But check at your end. _________________________________________________________________________________ import h5py import segyio import numpy as np # --- 1. Read HDF5 --- with h5py.File('my_seismic_input.h5', 'r') as hf: # Assuming data is in '/traces' and headers in '/trace_headers' traces = hf['/traces'][:] # Read all traces into memory (adjust for large files) headers = hf['/trace_headers'][:] # Read headers (structured array) # Extract metadata as needed # --- 2. Prepare for SEG-Y --- num_traces, num_samples = traces.shape # Create a blank SEG-Y file structure with segyio.create('output.segy', (num_traces, num_samples)) as f: # --- 3. Write Headers (Simplified) --- f.text[0] = b'Converted from HDF5' # Example text header # Map headers to binary_header (complex mapping required) # f.binary_header.trace_count = num_traces # --- 4. Write Traces --- for i in range(num_traces): f.trace[i] = traces[i, :] # Write trace data # Map headers[i] to f.header[i] (requires careful field mapping) # e.g., f.header[i][segyio.TraceField.TRACENO] = i __________________________________________________________________________________________________________ This should export your hdf5 file to segy. Best regards On Fri, 12 Dec 2025 at 13:19, Bitri Adnand <a.bitri(a)brgm.fr<mailto:a.bitri@brgm.fr>> wrote: Hi Khawar, I have DAS data in HDF5 format and I'm going to process it in SU. This requires converting the data to SEGY (or SU). Can this conversion be done using Python? Thanks Adnand De : Khawar Qazi <smartkhawar(a)gmail.com<mailto:smartkhawar@gmail.com>> Envoyé : vendredi 12 décembre 2025 11:20 À : Bitri Adnand <a.bitri(a)brgm.fr<mailto:a.bitri@brgm.fr>> Objet : Re: [Seisunix] HDF5 to Segy conversion Cet expéditeur (smartkhawar(a)gmail.com<mailto:smartkhawar@gmail.com>) vous écrit pour la première fois. Signaler l'email <https://urldefense.com/v3/__https:/app.mantra.ms/banners/report-as-threat?r…> Marquer comme sûr <https://urldefense.com/v3/__https:/app.mantra.ms/banners/mark-as-safe?sende…> Analysé par Mantra<https://urldefense.com/v3/__https:/mantra.ms/?from-banners__;!!KbSiYrE!lJUk…> HI, I think at the moment, the fastest way is to use the python tool. Below is a link which could help you. https://github.com/openEDI/documentation/blob/main/PoroTomo/PoroTomo_Distri…<https://urldefense.com/v3/__https:/github.com/openEDI/documentation/blob/ma…> Check this and let me know if it still doesnät help your problem. Best regards On Fri, 12 Dec 2025 at 10:33, Bitri Adnand <a.bitri(a)brgm.fr<mailto:a.bitri@brgm.fr>> wrote: Hi, everyone! I'm looking for a code that converts HDF5 data to SEGY. Thanks for your help Regards Adnand _______________________________________________ Seisunix mailing list -- seisunix(a)mailman.seismic-unix.org<mailto:seisunix@mailman.seismic-unix.org> To unsubscribe send an email to seisunix-leave(a)mailman.seismic-unix.org<mailto:seisunix-leave@mailman.seismic-unix.org> -- Dr. Khawar Ashfaq Ahmed -- Dr. Khawar Ashfaq Ahmed

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seismic-unix.org is back
by Dominique Rousset 02 Sep '25

02 Sep '25

Hi, after some weeks offline, due to a (badly managed) change of registrar, seismic-unix.org is back. - if you receive this message, the list server is now OK. Manage your subscription at http://mailman.seismic-unix.org - the wiki wiki.seismic-unix.org is waiting for contributions Keep on enjoying SU ! D.

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binary/ascii read/write
by mohammed rafique Attar 27 Dec '24

27 Dec '24

Hi all, I am facing an issue with a large file. Seismic Unix has limitations when processing, reading, or writing a number of samples beyond approximately 61,500. Could you please suggest how to increase this limit for handling larger datasets? -- -- *Mohammed Rafique*

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SU list server
by Dominique Rousset 11 Dec '24

11 Dec '24

Hi, Due to a failed update of mailman, the SU list server has been offline for a few weeks. It seems to be running now (if we receive this message, it is) D.

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XDR and tirpc. installation error #86
by Fernando M. Roxo da Motta 11 Dec '24

11 Dec '24

Hi all, I finally upgraded my computer to Xubuntu 22.04 and tried to install 44R28. Naturally I got all the problemas reported at: https://github.com/JohnWStockwellJr/SeisUnix/issues/86 I read all the discussion in that thread and got not really convinced for some reason. I have changed the Makefile.config inserting after CFLAGS definition: CFLAGS += -I/usr/include/tirpc -ltirpc (BTW, did the same with C++FLAGS, ust in case) This solved the problem with the 'rpc/types.h' and possibl others. Then I stumbled upon the ld(1) messages: ....undefined reference to `xdr_<something>' Next I verified the command being executed, it was: /usr/bin/gcc -I/usr/local/geof/cwp/include -g -std=c99 -m64 -Wall -ansi -Wno-long-long -DCWP_LITTLE_ENDIAN -DSUXDR -I/usr/include/tirpc -ltirpc sucentsamp.c -L/usr/local/geof/cwp/lib -lsu -lpar -lcwp -lm -o /usr/local/geof/cwp/bin/sucentsamp Then I started to recall very old experiences in compiltion and linking of programs and changed to the program directoru and changed the command to: /usr/bin/gcc -I/usr/local/geof/cwp/include -g -std=c99 -m64 -Wall -ansi -Wno-long-long -DCWP_LITTLE_ENDIAN -DSUXDR -I/usr/include/tirpc sucentsamp.c -L/usr/local/geof/cwp/lib -lsu -lpar -lcwp -lm -ltirpc -o /usr/local/geof/cwp/bin/sucentsamp And Voilá! No errors and no complains at all! What? Didn't you get the change? It was the position of the "-ltirpc" in the command. The order of the libraries in the link edit phase can be very importante. The libraries are searched in the order they appear. I tried to find where those are inserted in the command and found out that those are, or seems to be, in every Makefile down the directory tree in the line: LFLAGS= $(PRELFLAGS) -L$L -lsu -lpar -lcwp -lm $(POSTLFLAGS) I changed the variable POSTLFLAGS in Makefile.config and it seems to work, at least in relation to the previous undefined reference. Now it is barking about: ....undefined reference to `isfinite' while linking the program "sunan.c". All references I found so far (abut 3min searching) suggest to comment the lines with the reference to "isfinite", but I am not convinced that this kind of test should be avoided at all. I am still working on it and, if solved I will come back. HTH Roxo -- ---------------- Non luctari, ludare -------------------+ WYSIWYG Fernando M. Roxo da Motta <petro(a)roxo.org> | Editor? Except where explicitly stated I speak on my own behalf.| VI !! PU5RXO | PX5Q6048 | I see text, ------------ Quis custodiet ipsos custodes?-------------+ I get text!

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Top Mute
by Erdi Apatay 12 Aug '24

12 Aug '24

Hi all! I have real seismic data and I want to apply top mute to this data. Actually, I can apply top mute to shot gathers one by one, but I wanted to create a script that could apply top mute to all of them, but I could not get a good result. Do I need to create a script that includes a loop to do this properly? What path should I follow? I would be happy if you could help Best Erdi P.S.: I attached a script I wrote ( I tried to do top mute only for the right upper side of the shot gathers for testing), and how they look after applying my script, and output of surange command.

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Makefile.config. file for macOS Sonoma 14.4.1
by N.Gülünay 23 Apr '24

23 Apr '24

I have a question to SU community: If anyone of you installed SU successfully on MAXOS Sonoma 14.4.1 (latest MacOS) I would appreciate if you could let me know which Makefile.config that you used. Thank you in advance. N. Gulunay

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End of seismic-unix.org list server failure
by Dominique ROUSSET 09 Feb '24

09 Feb '24

Hi, the seismic unix list server has been out of order for some days. If you receive this message, it means that the problem has been fixed. I you have tried to send a message in the last days, please send it again. Sorry for the inconvenience D. -- |Dominique Rousset LFCR UMR5150 / E2S UPPA / Dpt des géosciences| |Univ. Pau et des Pays de l'Adour BP 1155 F-64013 Pau Cedex - France| |mailto:dominique.rousset@univ-pau.fr http://lfc.univ-pau.fr| | Off: +33 559 407 423 Cell: +33 660 861 391 |

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Nankai.su and Taiwan.su data
by youssef_g77＠yahoo.com 23 Nov '23

23 Nov '23

Hello all, I was wondering if the real 2D seismic data of Nankai and Taiwan are still available online. when I run Madagascar, I get this error "Could not download "./Nshots.su" from "http://www.ahay.org/data/nankai/Nshots.su" ". I presume the link was removed. Any idea what was the problem? Thanks

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