xm_hypo


NAME
     xm_hypo - Hypocenter format for the xmap8 program

SYNOPSIS
     xm_hypo - Input File Format

DESCRIPTION
     The default format for hypocenters in xmap8 is  UW  pickfile
     format for hypocenters and focal mechanisms.

     New: Now you can import hypoinverse  and  CalTech  Catalogue
     hypocenters into xmap8.  See below.

     Importation of fpfit output is still not available.



FORMAT
     Can have Several Source Files input. Use: -S file1 -S file2.....
     (S = Source)

     The hypocenter format is determined by env variable: XMA_HYPO_FORMAT
     which can be set to any of:  { UW , uw ,  hypoinverse , cit , CIT }
     Or it can be changed on the fly on the command line by including
     the suffix on the -S option, e.g.
     -Suw files  -Scit file ...etc.

     There is now a new format which is an augmented UW file
     card that include the unique name of the file
     added on the end, separated by a colon (:).
     This allows you to access a database of digital waveforms
     (or other information) which is accessed via the unique identification.



     e.g.
     setenv XMA_HYPO_FORMAT hypoinverse

     the default is UW format, described below.
     cit = CalTech Catalog format
     hypoinverse = (one variant of) hypoinverse format
     ----------------------------------------

     Hypocenters are normally screened spatially to limit
     the number stored in memory.  Normally, hypocenters
     located outside of the window surrounding the target
     are excluded.  To force inclusion of all hypocenters
     into memory use the command line option

     -force_source

     This will force all hypocenters to be included (no spatial selection).
     This is important to use when applying the "connect" option on the Source menu.
     This option requires that the source files being connected
     have 1-1 correspondence.


     ---------UW FORMAT-----------------------

         ident      sec   lat    long    depth mag np  ns gap delt err rms qq mod
     A 9005051858 24.25 36N0127 117W5001  2.50  0.0 05/005 266 01 0.05 00.2AD F1
     A 9005061311  7.80 36N0275 117W5144  2.02  0.2 06/005 304 05 0.03 00.3AD F1
     A 9005061308 47.18 36N0005 117W4801  2.07  0.0 05/005 200 00 0.05 00.2AD F1
     A 9005061309  5.68 36N0131 117W5024  2.08  0.0 06/006 273 02 0.03 00.1AD F1

     See Details below.
     Lat and Long are in the format ddNmmmm   where mmmm is minutes*100

     N can be either N or S
     W can be either W or E

     #################################
     FOCAL-MECHANISM file is also in UW format:

     Can have Several focal Mechanism Files input. Use: -F file1 -F file2.....

     It is organized as pairs of A and M cards.
     The A cards are the same as those described above.
      An example of an A & M-card pair is:

     A 9204230225 29.57 33N5728 116W1868 12.23  3.3 82/000  63  7 0.18  0.2BA CN
     M F 345 45 G 255 90 U 165 45 V 435  0 P 219 29 T 470 30

     M:      strk1 dip1  strk2 dip2 pol1 dip1 pol2 dip2 p-axis pdip taxis t-dip

     These pairs of cards must stay together and there may
     be many concatenated in one file.
     The first pair of strk-dip represent, by convention,
     the focal plane and the second the auxiliary plane.
     These can be switched by running a utility called switchfoc,
     or they can be switched in xmap8.  See accelerator keys.
     ----------------------------------------------------------
     Details of A-card -  UW FORMAT


          A    The header line begins with a 'A' in the first col and
               contains all of the date-time information for the
               event, as well as location, magnitude and some quality
               information.  The approved "types" which can appear in
               column 2 are: X- Known explosion, P- Probable explo-
               sion, F- Felt event, T- Teleseisms, H- Hand picked
               (previous 'types' take precedence), L- Low frequency
               volcanic, C- Centralia explosion, R- regional earthquake.

            Quality factors (UW) :

                Q1
                 C    =>     rms <0.5   err <5.0
                 B    =>     rms < 0.3  err < 2.5 errz<5
                 A    =>     rms <0.15  err< 1.0 errz < 2

                      Q2
                    C    =>     gap < 180  dmin < 50
                 B    =>     gap < 135   dmin < max(2*depth,5)
                 A    =>     gap <  90   dmin < max(depth,5)


     Type,Year,Month,Day,Hour,Min,Sec,Lat,NS,Latmin*100,Longitude,EW,Lonmin*100
     Depth,Fix,Magnitude,Numpobs,Numsobs,Gap,Mindelta,RMS,ERR,Q1,Q2,Velmodel
     FORMAT('A',A1,5I2,F6.2,I3,A1,I4,I4,A1,I4,
     F6.2,A1,F4.1,I3,'/',I3,I4,I3,F5.2,f5.1,2A1,1x,A2)
     ATYYMMDDHHMM SS.SS LLNMMMM LLLWMMMM DD.DD* M.M NN/NNN GGG DD R.RR EE.EQQ VV


          M    Mechanism line which summarizes the focal mechanism for
               this event.  Up to 6 fix format packets in pairs for
               nodal planes (F,G), slip vectors (U,V), and major
               stress axes (P,T).
               In format below AAA is the DOWN DIP AZIMUTH strike
               of a plane measured clockwise from north eastward.
               PP
               is the dip measured from the horizontal downward.
               For example a plane with a strike of N55E
               and dipping 30 to the SSE is AAA=145 PP=30.

     Plane#1,Plane#2,Slip#1,Slip#2,P-axis,T-axis,Comment
     FORMAT('M',6(1x,A1,1x,I3,1x,I2),'C',A)
     M F AAA PP G AAA PP U AAA PP V AAA PP P AAA PP T AAA PP C comment
     -----------------------------------------------------------------------
     hypoinverse example:
     8005190858461646 1165122 1231  95219 17 62  2  29  0 0 190  0 0 19019JJJ  40  17  40  40 0


     cit catalog example:
     1977  1  1  20 22 52.44  34  3.32-116 31.53 C 0.0      5.63  0    0.00       0














SEE ALSO

xmap8      
xm_color      
xm_hypo      
xm_map       
xm_menu       
xm_origin       
xm_points
xm_raster
xm_station      
xm_well      
xm_wire      
xm_xsec      
xm_ellipse


  • Xmap8: Three-dimensional GIS for Geology and Geophysics.

    REFERENCES see article by J. M. Lees: Lees, J. M. (1995) Xmap8: Three-dimensional GIS for geology and geophysics, Seismological Research Letters: 66, 33-37.

    Address:

      
          Prof. Jonathan M. Lees
          Yale Geology Dept.
          P.O. Box 208109
          New Haven, CT  06520-8109
          (203)432-6947
          lees@love.geology.yale.edu