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
  LIFNC BHZ  ND  00  +   a 230.19   2.91 ISC       LIFNC
  LIFNC HHZ  ND  00  +   a 230.19   2.91 ISC       LIFNC
  MARNC HHZ  ND  00  +   a 210.22   2.95 ISC       MARNC
  PINNC BHZ  ND  00  +   a 208.67   4.20 ISC       PINNC
  OUENC BHZ  ND  00  +   a 216.38   4.35 ISC       OUENC
  NOUC  BHZ   G  00  +   a 223.99   4.43 ISC       NOUC 
  ONTNC HHZ  ND  00  +   a 220.88   4.49 ISC       ONTNC
  ONTNC BHZ  ND  00  +   a 220.88   4.49 ISC       ONTNC
  AS31  BHZ  AU  --  -   a 255.56  33.56 ISC       AS31 
  TROLL BHZ  IR      d     183.98  88.88 AWI       TROLL
  SNAA  BHZ  IR      d     182.38  89.49 AWI       SNAA 
  VNA3  BHZ  IR      d     180.23  90.07 AWI       VNA3 

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