SDRfoc: Plot a Focal Mechanism from SDR

In RFOC: Graphics for Spherical Distributions and Earthquake Focal Mechanisms

Plot a Focal Mechanism from SDR

Description

Given Strike-Dip-Rake plot a focal mechanism

Usage

SDRfoc(s, d, r, u = FALSE, ALIM = c(-1, -1, +1, +1), PLOT = TRUE)

Arguments

s	strike, degrees
d	dip, degrees
r	rake, degrees
u	logical, TRUE=upper hemisphere
ALIM	bounding box on plot
PLOT	logical, TRUE=add to plot

Details

The ALIM vector allows one to zoom into portions of the focal mechanism for details when points are tightly clustered.

Value

MEC structure

Note

Basic MEC List Structure

az1	azimuth angle plane 1, degrees
dip1	dip angle plane 1, degrees
az2	azimuth angle plane 2, degrees
dip2	dip angle plane 2, degrees
dir	0,1 to determine which section of focal sphere is shaded
rake1	rake angle plane 1, degrees
dipaz1	dip azimuth angle plane 1, degrees
rake2	rake angle plane 2, degrees
dipaz2	dip azimuth angle plane 2, degrees
P	pole list(az, dip) P-axis
T	pole list(az, dip) T-axis
U	pole list(az, dip) U-axis
V	pole list(az, dip) V-axis
F	pole list(az, dip) F-axis
G	pole list(az, dip) G-axis
sense	0,1 to determine which section of focal sphere is shaded
M	list of focal parameters used in some calculations
UP	logical, TRUE=upper hemisphere
icol	index to suite of colors for focal mechanism
ileg	Kind of fault
fcol	color of focal mechanism
CNVRG	Character, note on convergence of solution
LIM	vector plotting region (x1, y1, x2, y2)

Author(s)

Jonathan M. Lees <[e-mail]>

See Also

CONVERTSDR

Examples

M = SDRfoc(-25, 34, 16,u = FALSE, ALIM = c(-1, -1, +1, +1), PLOT=TRUE)

RFOC documentation built on Sept. 8, 2023, 6:12 p.m.