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psmeca(1)                             GMT                            psmeca(1)




NAME

       psmeca - Plot focal mechanisms on maps


SYNOPSIS

       psmeca  [  table  ]   -Jparameters   -Rregion  [  -B[p|s]parameters ] [
       -C[pen][Ppointsize] ] [  -Ddepmin/depmax ] [  -Efill] [  -Fmode[args] ]
       [   -Gfill]  [   -K  ]  [   -L[pen] ] [  -M ] [  -N ] [  -O ] [  -P ] [
       -S<format><scale>[/d]]  [   -Tnum_of_plane[pen]  ]  [   -U[stamp]  ]  [
       -V[level]  ]  [   -Wpen  ]  [  -Xx_offset ] [  -Yy_offset ] [  -Zcpt] [
       -dinodata ] [ -eregexp ] [ -hheaders ] [  -iflags  ]  [  -ttransp  ]  [
       -:[i|o] ]

       Note:  No  space  is allowed between the option flag and the associated
       arguments.


DESCRIPTION

       psmeca reads data values from files [or standard input]  and  generates
       PostScript code that will plot focal mechanisms on a map.  Most options
       are the same as for psxy. The PostScript code is  written  to  standard
       output.


REQUIRED ARGUMENTS

       table  One  or  more ASCII (or binary, see -bi[ncols][type]) data table
              file(s) holding a number of data columns. If no tables are given
              then we read from standard input.

       -Jparameters (more a|)
              Select map projection.

       -Rwest/east/south/north[/zmin/zmax][+r][+uunit]
              west, east, south, and north specify the region of interest, and
              you   may   specify   them   in   decimal    degrees    or    in
              [A+-]dd:mm[:ss.xxx][W|E|S|N]  format Append +r if lower left and
              upper right map coordinates are given instead  of  w/e/s/n.  The
              two  shorthands  -Rg  and -Rd stand for global domain (0/360 and
              -180/+180 in longitude respectively, with -90/+90 in  latitude).
              Alternatively  for grid creation, give Rcodelon/lat/nx/ny, where
              code is a 2-character combination of L, C, R (for left,  center,
              or  right)  and T, M, B for top, middle, or bottom. e.g., BL for
              lower left.  This indicates which point on a rectangular  region
              the lon/lat coordinate refers to, and the grid dimensions nx and
              ny with grid spacings via -I is used to create the corresponding
              region.   Alternatively,  specify  the  name of an existing grid
              file and the -R settings (and grid spacing, if  applicable)  are
              copied from the grid. Appending +uunit expects projected (Carte-
              sian) coordinates compatible with chosen  -J  and  we  inversely
              project  to determine actual rectangular geographic region.  For
              perspective view (-p), optionally append /zmin/zmax.  In case of
              perspective view (-p), a z-range (zmin, zmax) can be appended to
              indicate the third dimension. This needs to be  done  only  when
              using  the -Jz option, not when using only the -p option. In the
              latter case a perspective view of the plane is plotted, with  no
              third dimension.

       -S<format><scale>[/d]

       Selects  the  meaning of the columns in the data file . In order to use
       the same file to plot cross-sections, depth is in third column.  Never-
       theless, it is possible to use aold stylea psvelomeca input files with-
       out depth in third column using the -o option.

       -Sascale[/fontsize[/offset[u]]]

       Focal mechanisms in Aki and  Richards  convention.  scale  adjusts  the
       scaling  of  the radius of the abeach balla, which will be proportional
       to the magnitude. Scale is the size for magnitude = 5 in  inch  (unless
       c,  i,  or  p  is appended). Use the -T option to render the beach ball
       transparent by drawing only the nodal planes and the circumference. The
       color  or  shade of the compressive quadrants can be specified with the
       -G option. The color or shade of the extensive quadrants can be  speci-
       fied  with  the  -E  option. Append u to have the text appear below the
       beach ball (default is above). Parameters are expected  to  be  in  the
       following columns:
          1,2:  longitude, latitude of event (-: option interchanges order) 3:
          depth of event in kilometers 4,5,6: strike, dip and rake in  degrees
          7:  magnitude 8,9: longitude, latitude at which to place beach ball.
          Entries in these columns are necessary with the -C option. Using 0,0
          in  columns 8 and 9 will plot the beach ball at the longitude, lati-
          tude given in columns 1 and 2. The -: option  will  interchange  the
          order  of  columns (1,2) and (8,9).  10: Text string to appear above
          or below the beach ball (optional).

       -Scscale[/fontsize[/offset[u]]]

       Focal mechanisms in Harvard CMT convention. scale adjusts  the  scaling
       of  the  radius  of the abeach balla, which will be proportional to the
       magnitude. Scale is the size for magnitude = 5 (that  is  M0  =  4.0E23
       dynes-cm)  in  inch (unless c, i, or p is appended).  Use the -T option
       to render the beach ball transparent by drawing only the  nodal  planes
       and  the circumference. The color or shade of the compressive quadrants
       can be specified with the -G option. The color or shade of  the  exten-
       sive  quadrants  can  be specified with the -E option. Append u to have
       the text appear below the beach ball (default is above). Parameters are
       expected to be in the following columns:
          1,2:  longitude, latitude of event (-: option interchanges order) 3:
          depth of event in kilometers 4,5,6: strike, dip, and rake of plane 1
          7,8,9: strike, dip, and rake of plane 2 10,11: mantissa and exponent
          of moment in dyne-cm 12,13: longitude, latitude at  which  to  place
          beach  ball.  Entries  in  these  columns  are necessary with the -C
          option. Using (0,0) in columns 12 and 13 will plot the beach ball at
          the longitude, latitude given in columns 1 and 2. The -: option will
          interchange the order of columns (1,2) and (12,13).  14: Text string
          to appear above or below the beach ball (optional).

       -Sm|d|zscale[/fontsize[/offset[u]]]

       Seismic moment tensor (Harvard CMT, with zero trace). scale adjusts the
       scaling of the radius of the abeach balla, which will  be  proportional
       to  the  magnitude. Scale is the size for magnitude = 5 (that is scalar
       seismic moment = 4.0E23 dynes-cm) in inch (unless c,  i,  m,  or  p  is
       appended).  (-T0 option overlays best double couple transparently.) Use
       -Sm to plot the Harvard CMT seismic moment tensor with zero trace.  Use
       -Sd  to  plot  only the double couple part of moment tensor. Use -Sz to
       plot the anisotropic part of moment tensor (zero trace). The  color  or
       shade of the compressive quadrants can be specified with the -G option.
       The color or shade of the extensive quadrants can be specified with the
       -E  option.  Append  u  to  have  the  text appear below the beach ball
       (default is above). Parameters are expected to be in the following col-
       umns:
          1,2:  longitude, latitude of event (-: option interchanges order) 3:
          depth of event in kilometers 4,5,6,7,8,9: mrr, mtt, mff,  mrt,  mrf,
          mtf  in 10*exponent dynes-cm 10: exponent 11,12: longitude, latitude
          at which to place beach ball. Entries in these columns are necessary
          with  the  -C option. Using (0,0) in columns 11 and 12 will plot the
          beach ball at the longitude, latitude given in columns 1 and 2.  The
          -:  option  will interchange the order of columns (1,2) and (11,12).
          13: Text string to appear above or below the beach ball  (optional).

       -Spscale[/fontsize[/offset[u]]]

       Focal  mechanisms given with partial data on both planes. scale adjusts
       the scaling of the radius of the abeach balla, which  will  be  propor-
       tional  to  the  magnitude. Scale is the size for magnitude = 5 in inch
       (unless c, i, or p is appended). The color or shade of the  compressive
       quadrants  can  be  specified with the -G option. The color or shade of
       the extensive quadrants can be specified with the -E option.  Append  u
       to have the text appear below the beach ball (default is above). Param-
       eters are expected to be in the following columns:
          1,2: longitude, latitude of event (-: option interchanges order)  3:
          depth  of  event in kilometers 4,5: strike, dip of plane 1 6: strike
          of plane 2 7: must be -1/+1 for a normal/inverse fault 8:  magnitude
          9,10:  longitude,  latitude at which to place beach ball. Entries in
          these columns are necessary with the -C option. Using (0,0) in  col-
          umns  9  and  10 will plot the beach ball at the longitude, latitude
          given in columns 1 and 2. The -: option will interchange  the  order
          of  columns  (1,2)  and  (9,10).  11: Text string to appear above or
          below the beach ball (optional).

       -Sx|y|tscale[/fontsize[/offset[u]]]

       Principal axis. scale adjusts the scaling of the radius of  the  abeach
       balla,  which  will be proportional to the magnitude. Scale is the size
       for magnitude = 5 (that is seismic scalar moment =  4*10e+23  dynes-cm)
       in inch (unless c, i, or p is appended). (-T0 option overlays best dou-
       ble couple transparently.) Use -Sx to plot standard  Harvard  CMT.  Use
       -Sy  to  plot  only the double couple part of moment tensor. Use -St to
       plot zero trace moment tensor. The color or shade  of  the  compressive
       quadrants  can  be  specified with the -G option. The color or shade of
       the extensive quadrants can be specified with the -E option.  Append  u
       to have the text appear below the beach ball (default is above). Param-
       eters are expected to be in the following columns:
          1,2: longitude, latitude of event (-: option interchanges order)  3:
          depth   of  event  in  kilometers  4,5,6,7,8,9,10,11,12:  value  (in
          10*exponent dynes-cm), azimuth, plunge of T, N, P axis.   13:  expo-
          nent  14,15:  longitude,  latitude  at  which  to  place beach ball.
          Entries in these columns are necessary with  the  -C  option.  Using
          (0,0)  in  columns  14 and 15 will plot the beach ball at the longi-
          tude, latitude given in columns 1 and 2. The -: option  will  inter-
          change  the  order of columns (1,2) and (14,15).  16: Text string to
          appear above or below the beach ball (optional).


OPTIONAL ARGUMENTS

       -B[p|s]parameters (more a|)
              Set map boundary frame and axes attributes.

       -C[pen][Ppointsize]
              Offsets focal mechanisms to the longitude, latitude specified in
              the  last  two  columns  of the input file before the (optional)
              text string. A small circle is plotted at the  initial  location
              and  a  line  connects  the beachball to the circle. Specify pen
              and/or pointsize to change the line style  and/or  size  of  the
              circle.  [Defaults: pen as given by -W; pointsize 0].

       -Ddepmin/depmax
              Plots events between depmin and depmax.

       -Efill Selects  filling  of extensive quadrants. Usually white. Set the
              color [Default is white].

       -Fmode[args]
              Sets one or more attributes; repeatable.  The  various  combina-
              tions are

       -Fa[size][/P_axis_symbol[T_axis_symbol]]
              Computes and plots P and T axes with symbols. Optionally specify
              size and (separate) P and T axis symbols from the following: (c)
              circle,  (d)  diamond,  (h)  hexagon,  (i) inverse triangle, (p)
              point, (s) square, (t) triangle, (x) cross. [Default: 6p/cc]

       -Fefill
              Sets the color or fill pattern for the T axis  symbol.  [Default
              as set by -E]

       -Fgfill
              Sets  the  color or fill pattern for the P axis symbol. [Default
              as set by -G]

       -Fo    Use the psvelomeca input format without depth in the third  col-
              umn.

       -Fp[pen]
              Draws the P axis outline using default pen (see -W), or sets pen
              attributes.

       -Fr[fill]
              Draw a box behind the label (if any). [Default fill is white]

       -Ft[pen]
              Draws the T axis outline using default pen (see -W), or sets pen
              attributes.

       -Fz[pen]
              Overlay  zero trace moment tensor using default pen (see -W), or
              sets pen attributes.

       -Gfill Selects filling of focal mechanisms. By convention, the compres-
              sional  quadrants of the focal mechanism beach balls are shaded.
              Set the color [Default is black].

       -K (more a|)
              Do not finalize the PostScript plot.

       -Lpen  Draws the abeach balla outline with pen  attributes  instead  of
              with the default pen set by -W.

       -M     Use the same size for any magnitude. Size is given with -S.

       -N     Does not skip symbols that fall outside frame boundary specified
              by -R [Default plots symbols inside frame only].

       -O (more a|)
              Append to existing PostScript plot.

       -P (more a|)
              Select aPortraita plot orientation.

       -T[num_of_planes][/pen]
              Plots the nodal planes and outlines the bubble which  is  trans-
              parent.  If num_of_planes is

              0: both nodal planes are plotted;

              1: only the first nodal plane is plotted;

              2: only the second nodal plane is plotted.

              Append /pen to set the pen attributes for this feature.  Default
              pen is as set by -W.

       -U[[just]/dx/dy/][c|label] (more a|)
              Draw GMT time stamp logo on plot.

       -V[level] (more a|)
              Select verbosity level [c].

       -Wpen  Set pen attributes for all lines  and  the  outline  of  symbols
              [Defaults:  width = default, color = black, style = solid]. This
              setting applies to -C, -L, -T, -p, -t, and -Fz, unless overruled
              by options to those arguments.

       -X[a|c|f|r][x-shift[u]]

       -Y[a|c|f|r][y-shift[u]] (more a|)
              Shift plot origin.

       -Zcpt  Give  a  CPT and let compressive part color be determined by the
              z-value in the third column.

       -dinodata (more a|)
              Replace input columns that equal nodata with NaN.

       -e[~]^<i>apattern^<i>a | -e[~]/regexp/[i] (more a|)
              Only accept data records that match the given pattern.

       -h[i|o][n][+c][+d][+rremark][+rtitle] (more a|)
              Skip or produce header record(s).

       -icols[+l][+sscale][+ooffset][,^<i>a|] (more a|)
              Select input columns and transformations (0 is first column).

       -t[transp] (more a|)
              Set PDF transparency level in percent.

       -:[i|o] (more a|)
              Swap 1st and 2nd column on input and/or output.

       -^ or just -
              Print a short message about the  syntax  of  the  command,  then
              exits (NOTE: on Windows just use -).

       -+ or just +
              Print  an extensive usage (help) message, including the explana-
              tion of any module-specific  option  (but  not  the  GMT  common
              options), then exits.

       -? or no arguments
              Print a complete usage (help) message, including the explanation
              of all options, then exits.


EXAMPLES

       The following file should give a normal-faulting CMT mechanism:

              gmt psmeca -R239/240/34/35.2 -Jm4c -Sc0.4 -h1 << END > test.ps
              lon lat depth str dip slip st dip slip mant exp plon plat
              239.384 34.556 12. 180 18 -88 0 72 -90 5.5 0 0 0
              END


SEE ALSO

       pspolar(1), psvelo(1), pscoupe(1), gmt(1), psbasemap(1), psxy(1)


REFERENCES

       Bomford, G., Geodesy, 4th ed., Oxford University Press, 1980.

       Aki, K. and P. Richards, Quantitative Seismology, Freeman, 1980.

       F. A. Dahlen and Jeroen Tromp, Theoretical Seismology, Princeton, 1998,
       p.167.

       Cliff Frohlich, Cliffas Nodes Concerning Plotting Nodal Lines for P, Sh
       and Sv

       Seismological Research Letters, Volume 67, Number 1,  January-February,
       1996

       Thorne Lay, Terry C. Wallace, Modern Global Seismology, Academic Press,
       1995, p.384.

       W.H. Press, S.A. Teukolsky, W.T. Vetterling, B.P.  Flannery,  Numerical
       Recipes in C, Cambridge University press (routine jacobi)


AUTHORS

       Genevieve        Patau,        Laboratory        of       Seismogenesis
       <http://www.ipgp.fr/rech/sismogenese/>, Institut de Physique  du  Globe
       de Paris, Departement de Sismologie, Paris, France


COPYRIGHT

       2017, P. Wessel, W. H. F. Smith, R. Scharroo, J. Luis, and F. Wobbe



5.4.2                            Jun 24, 2017                        psmeca(1)

gmt5 5.4.2 - Generated Thu Jun 29 15:32:35 CDT 2017
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