R: fault plane projection on focal sphere

faultplane {RFOC} | R Documentation

## 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)

### 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

### 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 <jonathan.lees@unc.edu>

### 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)

[Package RFOC version 3.4-3 Index]