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Seismic Data Processing Tutorial: Remove Responses & Rotate Components

Learn how to remove instrument response, pick P arrivals, and rotate components for seismic data analysis. Step-by-step guide using SEED volumes and IRIS tools.

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Seismic Data Processing Tutorial: Remove Responses & Rotate Components

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  1. Exercise.06 • Unpack a SEED volume • Remove the instrument response • Pick P arrivals • Local event • Unpack again using location so that components can be rotated to great circle

  2. cd IRIS I start here, copy the SEED volume and the IDO* scripts here. Then • mkdir Sac (already exists) • cd Sac • rdseed -f ../20041027.seed -R -d -o 1 to create a SAC file and to get the response • ../IDOEVT - to unpack and deconvolve. Original data are not changed. New files are placed in the ../GOOD directory

  3. cd ../GOOD Perform QC - normally not a problem with SEED volumes if instrument response is correct. Use gsac to GSAC> r *.sac GSAC> sort depmax GSAC> lh depmax Rotate to 3 components ../IDOROT

  4. cd ../FINAL • ../IDODEC to decimate for multiple filter analysis.

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