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
  HWA   ???  IR      +     283.18   0.15 ISC       HWA  
  TWD   ???  IR      +     312.05   0.20 ISC       TWD  
  TWC   ???  IR      +       6.90   0.67 ISC       TWC  
  TWF1  ???  IR      +     215.94   0.73 ISC       TWF1 
  TWQ   ???  IR      -     291.50   0.91 ISC       TWQ  
  TWZ   ???  IR      -     351.83   1.16 ISC       TWZ  
  TWK   ???  IR      +     240.27   1.35 ISC       TWK  
  PCT   ???  IR      +     248.03  21.28 ISC       PCT  
  CHG   ???  IR      +     260.87  21.84 ISC       CHG  
  SHL   ???  IR      +     279.67  27.16 ISC       SHL  
  IPM   ???  IR      +     229.14  27.82 ISC       IPM  
  IRK   ???  IR      -     339.14  31.26 ISC       IRK  
  SEM   ???  IR      +     320.24  41.54 ISC       SEM  
  POO   ???  IR      -     272.63  44.82 ISC       POO  
  WRA   ???  IR      c     163.25  45.31 ISC       WRA  
  WBN   ???  IR      +     174.35  50.01 ISC       WBN  
  MAIO  ???  IR      +     298.47  54.44 ISC       MAIO 
  SVE   ???  IR      +     323.78  54.55 ISC       SVE  

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