faultplane: fault plane projection on focal sphere

In RFOC: Graphics for Spherical Distributions and Earthquake Focal Mechanisms

fault plane projection on focal sphere

Description

given azimuth and dip of fault mechanism, calculate and plot the fault plane.

Usage

faultplane(az, dip, col = par("col"), PLOT = TRUE, UP = FALSE,lwd=2, lty=1, ...)

Arguments

az	degrees, strike of the plane (NOT down dip azimuth)
dip	degrees, dip from horizontal
col	color for line
PLOT	option for adding to plot
UP	upper or lower hemisphere
lwd	Line Width
lty	Line Type
...	graphical parameters

Details

Azimuth is the strike in degrees, not the down dip azimuth as described in other routines.

Value

list of points along fault plane

x	coordinates on focal sphere
y	coordinates on focal sphere

Author(s)

Jonathan M. Lees <[e-mail]>

See Also

Beachfoc

Examples

gcol='black'
border='black'
ndiv=36
phi = seq(0,2*pi, by=2*pi/ndiv);
  x = cos(phi);
  y = sin(phi);

plot(x,y, type='n', asp=1)
  lines(x,y, col=border)
  lines(c(-1,1), c(0,0), col=gcol)
  lines(c(0,0), c(-1,1), col=gcol)

faultplane(65, 34)

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