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
  OWA   ???  IR      c     331.29   4.76 ISC       OWA  
  CHJJ  ???  IR      c       0.36   6.12 ISC       CHJJ 
  TSRJ  ???  IR      d     336.79   6.14 ISC       TSRJ 
  QIZ   ???  IR      +     254.38  28.54 ISC       QIZ  
  CHG   ???  IR      -     262.37  37.91 ISC       CHG  
  WRA   ???  IR      +     185.68  49.76 ISC       WRA  
  MBC   ???  IR      +      15.12  63.92 ISC       MBC  
  ORV   ???  IR      +      51.14  78.27 ISC       ORV  
  SES   ???  IR      +      37.78  78.99 ISC       SES  
  MHC   ???  IR      +      53.16  79.25 ISC       MHC  
  CMB   ???  IR      +      52.05  79.78 ISC       CMB  
  LRM   ???  IR      +      42.18  80.74 ISC       LRM  
  FRB   ???  IR      +      11.91  84.16 ISC       FRB  

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