mttime.imaging.beachball.beach

beach(fm, linewidth=1, facecolor='0.75', bgcolor='w', edgecolor='k', alpha=1.0, xy=(0, 0), width=200, size=100, nofill=False, zorder=100, mopad_basis='NED', axes=None, show_iso=False)[source]

Plot beach ball based on MoPaD

Function that returns a beach ball as a collection and can be added to an existing Axes.

Parameters

  • fm (list) – focal mechanism in (strike, dip, rake) or (M11,M22,M33,M12,M13,M23). The moment tensor elements are given for a coordinate system with axes pointing in three directions.

  • linewidth (float) – width of nodal and border lines. Default is 0.8.

  • facecolor (str) – color or shade of the compressive quadrants. Default is 0.75 (gray).

  • bgcolor (str) – background color, default is w (white).

  • edgecolor (str) – color of nodal and border lines, default is b (black).

  • alpha (float) – beach ball transparency, default is 1.0 (opaque).

  • xy (tuple) – original position of the beach ball. Default is (0, 0)

  • width (float) – width of the beach ball (aka symbol size). Default is 200.

  • size (int) – number of points interpolated to draw the curve. Default is 100.

  • nofill (bool) – no shading of the beach ball. Default is False.

  • zorder (float) – set the zorder for the artist. Artists with lower zorder values are drawn first. Default is 100.

  • mopad_basis (str) – moment tensor coordinate system. Default is "NED".

  • axes (Axes) – figure axis for beach ball, this is used to ensure the aspect ratio is adjusted so that the beach ball is circular on non-scaled axes. When this option is used figure cannot be saved in vector format. Default is None.

  • show_iso (bool) – flag to display the isotropic component, default is False.

Returns

a collection of lines and polygons.

Return type

PatchCollection

Warning

Set axes=None if you want to save the beach ball image in vector file formats.