SUMMARY HYPO71 FORMAT YEAR 2000
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The real-time computers in Menlo Park, among others, produce data in
this format.  It is more readable than but is a subset of the
Hypoinverse format.  For code definitions, such as data source code,
see the file shadow.doc.

* indicates a new/revised field

Start      Fortran
Col.  Len. Format  Data

1     4    I4      Year *
5     4    2I2     Month and day.
9     1    1X      Must be blank
10    4    2I2     Hour and minute.
14    6    F6.2    Origin time seconds.
20    3    F3.0    Latitude (deg).
23    1    A1      S for south, blank otherwise.
24    5    F5.2    Latitude (min).
29    4    F4.0    Longitude (deg).
33    1    A1      E for east, blank otherwise.
34    5    F5.2    Longitude (min).
39    7    F7.2    Depth (km).
46    1    1X      Blank
47    1    A1      Magnitude type code.
48    5    F5.2    Magnitude.
53    3    I3      Number of P & S times with weights greater than 0.1.
56    4    F4.0    Maximum azimuthal gap.
60    5    F5.1    Distance to nearest station (km).
65    5    F5.2    RMS travel time residual.
70    5    F5.1    Horizontal error (km).
75    5    F5.1    Vertical error (km).
80    1    A1      Remark: Q if Quarry blast.
81    1    A1      Remark: Quality flag A-D.
82    1    A1      Remark: Data source code. (See table 1; ie W= earthworm).
83    1    1X      Blank
84    10   I10     Event identification number
94    1    1X      Blank
95    1    A1      Version number of information: 0=25 pick; 1=Final EW with MD;
                   2=ML added, etc. 0-9, then A-Z.
96    3    A3      3-letter location remark