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
  HATZ  ???  IR      c      56.07   0.10 WEL       HATZ 
  RITZ  ???  IR      d     252.54   0.11 WEL       RITZ 
  RATZ  ???  IR      c     294.94   0.19 WEL       RATZ 
  KATZ  ???  IR      c     262.55   0.23 WEL       KATZ 
  WHTZ  ???  IR      d     355.03   0.28 WEL       WHTZ 
  KRVZ  ???  IR      d     241.06   0.31 WEL       KRVZ 
  WATZ  ???  IR      c     319.85   0.31 WEL       WATZ 
  OTVZ  ???  IR      d     229.08   0.33 WEL       OTVZ 
  WTVZ  ???  IR      d     241.22   0.35 WEL       WTVZ 
  NGZ   ???  IR      d     232.55   0.38 WEL       NGZ  
  WPVZ  ???  IR      d     232.99   0.43 WEL       WPVZ 
  TWVZ  ???  IR      d     253.56   0.45 WEL       TWVZ 
  BKZ   ???  IR      c     119.43   0.45 WEL       BKZ  
  FWVZ  ???  IR      c     227.49   0.46 WEL       FWVZ 
  WNVZ  ???  IR      d     218.43   0.49 WEL       WNVZ 
  TRVZ  ???  IR      d     224.02   0.49 WEL       TRVZ 
  MOVZ  ???  IR      d     201.60   0.50 WEL       MOVZ 
  MTVZ  ???  IR      d     222.39   0.60 WEL       MTVZ 

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