Compressed File Format Format Description by character position

   0      blank
   1-5    Catalog Source (a5)
   6-11   Year (a6)
  12-13   Month (i2)
  14-15   Day (i2)
  16-24   Origin Time (f9.2)
  25-26   Coordinate/OT Auth.(a2)
  27-33   Latitude (f7.3) [-=South] 
  34-41   Longitude (f8.3) [-=West]
  42-44   Depth (i3)
  47      Depth Control Designator (a1)
  48-49   pP Phases( i2)
  50-53   Std. Dev.(4.2)
  54-56   mb magnitude (f3.1)
  57-58   mb obs (i2)
  59-61   Ms magnitude (f3.1)
  62      Z/H Component (a1)
  63-64   Ms obs. (i2)
  65-68   Magnitude1 (f4.2)
  69-70   Mag1. Scale (a2)
  71-75   Mag1 Donor (a5)
  76-79   Magnitude2 (f4.2)
  80-81   Mag2. Scale (a2)
  82-86   Mag2 Donor (a5)
  87-89   Region Number (i3)
  90-92   Sta. No./Qual. (a3)
  93      Io value (a1)
  94      Cultural Effect (a1)
  95      Isoseismal Map (a1)
  96      Fault Plane Sol. (a1)
  97      Moment Flag (a1)
  98      ISC Depth Flag (a1)
  99      IDE Flag (a1)
  100     Preferred Flag (a1)
  101     Flag (a1)
  102-108 Phenomena Codes (7a1)
  109-115 Radial Distance (a7)

References