Black dots -> compressions (C,c,+,U,u)
White dots -> dilatations (D,d,-)
Green dot  -> T-axis
Red dot    -> P-axis

  sta  chan net loc pol a/m   azi   dist author    irsta
  TRT   ???  IR      -      93.12   6.72 ISC       TRT  
  WRA   ???  IR      +     117.22  30.29 ISC       WRA  
  GBA   ???  IR      +     306.38  35.10 ISC       GBA  
  CTA   ???  IR      +     112.09  41.09 ISC       CTA  
  STK   ???  IR      -     131.08  41.23 ISC       STK  
  NDI   ???  IR      c     323.63  45.27 ISC       NDI  
  KHO   ???  IR      +     326.77  54.96 ISC       KHO  
  BKR   ???  IR      +     316.64  74.95 ISC       BKR  
  NRI   ???  IR      +     353.65  77.63 ISC       NRI  
  TIK   ???  IR      +       7.22  80.31 ISC       TIK  
  OBN   ???  IR      +     327.32  84.44 ISC       OBN  
  VRI   ???  IR      -     316.63  87.75 ISC       VRI  
  BNG   ???  IR      -     274.71  87.91 ISC       BNG  
  MLR   ???  IR      +     316.14  88.21 ISC       MLR  
  ZGN   ???  IR      c     305.62  98.97 ISC       ZGN  

sta    - Station code (FDSN)
chan   - channel code
net    - Network code (FDSN)
loc    - Location code (FDSN)
pol    - Polarity
a/m    - Automatic or manual pick
azi    - Event to station azimuth (in degrees)
dist   - Event to station distance (in degrees)
author - Author of the polarity
irsta  - International registry station code