Hello Everyone Good morning. I recently received seismic dataset in SEISAN format with response files from ISR (Indian seismological research institute, Gandhinagar). I have following issue with this:
when i use l (locate command in SEISAN) one particular event gives me mw=3.1 (this is correct). I use gr v command and out the velocities in seisan format. I then use seiasc command to convert the file to ascii format (for subsequent processing). I understand that ascii file numbers are in nano unit (n-m or nano-g)? I do subsequent processing in matlab with well tested code, and it gives mw~2.45. However, if i multiply ascii output velocity numbers by g (9.8), and then do processing in matlab i get correct mw of 3.1. It has been written in SEISAN manual that if i use seiasc command i need to multiply the output velocity/acceleration values by a constant. Is multiplying by g is correct or how to calculate that constant. I need output file in ascii format only. I have attached the seisan file of the event, response files, and ascii output. Is multiplying with g is correct? Thanks for the help. Atul
2011-01-02-0801-03S.SUV0__002
Description: Binary data
SUV0_B__E.2007-00-00-0000_SEI
Description: Binary data
SUV0_B__N.2007-00-00-0000_SEI
Description: Binary data
seiasc.out
Description: Binary data
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