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
  SSE   ??Z  IR      +     295.86  20.77 ISC       SSE  
  CHG   ???  IR      -     272.03  41.25 ISC       CHG  
  WRA   ???  IR      -     191.78  44.09 ISC       WRA  
  SHL   ???  IR      C     283.46  46.31 ISC       SHL  
  GBA   ???  IR      +     273.52  62.50 ISC       GBA  
  WDC   ???  IR      +      50.86  78.24 ISC       WDC  
  MIN   ???  IR      +      50.82  78.99 ISC       MIN  
  PRS   ???  IR      +      54.53  80.66 ISC       PRS  
  CMB   ???  IR      +      52.63  80.74 ISC       CMB  
  FRI   ???  IR      +      53.39  81.64 ISC       FRI  
  FFC   ???  IR      +      31.89  84.31 ISC       FFC  

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