Draws a beachball diagram of an earthquake focal mechanism

Most source code provided here are adopted from

  1. MatLab script bb.m written by Andy Michael, Chen Ji and Oliver Boyd.
  2. ps_meca program from the Generic Mapping Tools (GMT).
copyright:The ObsPy Development Team (devs@obspy.org)
license:GNU Lesser General Public License, Version 3 (https://www.gnu.org/copyleft/lesser.html)

Public Functions

aux_plane Get Strike and dip of second plane.
beach Return a beach ball as a collection which can be connected to an current matplotlib axes instance (ax.add_collection).
beachball Draws a beach ball diagram of an earthquake focal mechanism.
mt2axes Calculates the principal axes of a given moment tensor.
mt2plane Calculates a nodal plane of a given moment tensor.
plot_dc Uses one nodal plane of a double couple to draw a beach ball plot.
plot_mt Uses a principal axis T, N and P to draw a beach ball plot.
strike_dip Finds strike and dip of plane given normal vector having components n, e, and u.
tdl Helper function for mt2plane.


MomentTensor A moment tensor.
NodalPlane A nodal plane.
PrincipalAxis A principal axis.