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
  GRG   ??Z  IR      +     233.70   0.43 SKO       GRG  
  SOH   ??Z  IR      +     135.69   0.54 SKO       SOH  
  PEHC  ??Z  IR      +       3.36   0.57 SKO       PEHC 
  THE   ??Z  IR      +     171.79   0.58 SKO       THE  
  KKB   ??Z  IR      +      17.93   0.66 SKO       KKB  
  MMB   ??Z  IR      +      63.15   0.75 SKO       MMB  
  FNA   ??Z  IR      -     249.64   1.20 SKO       FNA  
  NEO   HHZ  HL  --  -   a 171.50   1.92 ISC       NEO  
  BLKB  HHZ  BS  --  -   a 356.89   2.41 ISC       BLKB 
  ANX   HHZ  HP  --  -   a 195.68   2.71 ISC       ANX  
  HUMR  HHZ  RO  --  -   a  24.51   3.67 ISC       HUMR 
  MORH  HHZ  HU  --  -   a 330.03   5.86 ISC       MORH 
  KOVH  HHZ  HU  --  +   a 326.32   5.97 ISC       KOVH 

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