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
  TWC   ???  IR      C      60.06   0.12 TAP       TWC  
  ENA   ???  IR      C     178.86   0.12 TAP       ENA  
  ENTT  ???  IR      C     299.50   0.18 TAP       ENTT 
  TWE   ???  IR      C     339.05   0.18 TAP       TWE  
  ILA   ???  IR      C       2.34   0.21 TAP       ILA  
  NNS   ???  IR      D     251.71   0.35 TAP       NNS  
  NSK   ???  IR      C     289.86   0.37 TAP       NSK  
  NACB  ???  IR      c     199.26   0.40 NEIC      NACB 
  TWA   ???  IR      D     341.82   0.45 TAP       TWA  
  TWD   ???  IR      D     195.51   0.49 TAP       TWD  
  TWB1  ???  IR      D      26.47   0.51 TAP       TWB1 
  NWF   ???  IR      D       4.27   0.52 TAP       NWF  
  TWT   ???  IR      D     240.09   0.59 TAP       TWT  
  TWS1  ???  IR      D     332.04   0.62 TAP       TWS1 
  NSTT  ???  IR      C     276.92   0.68 TAP       NSTT 
  ESL   ???  IR      D     200.87   0.79 TAP       ESL  
  TYC   ???  IR      D     231.50   1.03 TAP       TYC  
  YUS   ???  IR      D     214.39   1.28 TAP       YUS  
  CHN5  ???  IR      C     225.80   1.36 TAP       CHN5 
  CHN1  ???  IR      D     219.42   1.75 TAP       CHN1 

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