Focal Mechanism (Beachball Plots)

Author: O.Conrad (c) 2018
Menu: Visualization | Shapes

Description

This tool creates a new polygon layer with beachball plots as representation of focal mechanism solution data. Focal mechanism data of earthquakes have to be supplied as strike and dip angles of the fault plane and rake angle (slip vector) as deviation from the strike angle.

References

Cronin, V. (2010): A Primer on Focal Mechanism Solutions for Geologists. Baylor University. pdf.

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Points	shapes, input	`POINTS`	-	-
Output	Focal Mechanism Beachballs	shapes, output	`PLOTS`	-	-
Options	Strike	table field	`STRIKE`	-	-
	Dip	table field	`DIP`	-	-
	Rake	table field	`RAKE`	-	-
	Size	table field	`SIZE`	-	-
	Default	floating point number	`SIZE_DEF`	-	Minimum: 0.000000 Default: 1.000000
	Scale to...	value range	`SIZE_RANGE`	-	-
	Arc Vertex Distance [Degree]	floating point number	`DARC`	-	Minimum: 0.100000 Maximum: 10.000000 Default: 5.000000
	Style	choice	`STYLE`	-	Available Choices: [0] one [1] two Default: 0

Command Line

Usage: saga_cmd shapes_tools 29 [-POINTS ] [-STRIKE ] [-DIP ] [-RAKE ] [-SIZE ] [-SIZE_DEF ] [-SIZE_RANGE_MIN ] [-SIZE_RANGE_MAX ] [-PLOTS ] [-DARC ] [-STYLE ]
  -POINTS:           	Points
	shapes, input
  -STRIKE:           	Strike
	table field
  -DIP:              	Dip
	table field
  -RAKE:             	Rake
	table field
  -SIZE:             	Size
	table field
  -SIZE_DEF:      	Default
	floating point number
	Minimum: 0.000000
	Default: 1.000000
  -SIZE_RANGE_MIN:	Scale to...
	value range
  -SIZE_RANGE_MAX:	Scale to...
	value range
  -PLOTS:            	Focal Mechanism Beachballs
	shapes, output
  -DARC:          	Arc Vertex Distance [Degree]
	floating point number
	Minimum: 0.100000
	Maximum: 10.000000
	Default: 5.000000
  -STYLE:            	Style
	choice
	Available Choices:
	[0] one
	[1] two
	Default: 0