dismodel.txt
lhsu, 30 june 2004

Defining a thrust fault for FaultGeom
-------------------------------------

Example for Taiwan

- a NE-SW trending fault, east-dipping, thrusting up to the west, intersecting
  the decollement and another shallower fault at depth

- FaultGeom is set up as:

  width  depth  dip  lat/lon.start  lat/lon.end  strike-slip  dip-slip  opening

  width - the horizontal projection of the fault
  depth - vertical depth from surface from where you define the dip angle
  dip   - angle of dip, starting from the horizontal
	  using right hand rule, if +z is pointing from start lat/lon to
	  end lat/lon, then +y is the horizontal zero. (+z is thumb, +y is
	  index finger, +x is 3rd finger, and pointing towards the sky)
        - positive angle is counterclockwise from horizontal, if you are
	  looking towards +z
  lat/lon.start - in this example, start at the SW edge 
  lat/lon.end   - in this example, end at the NE edge
  strike-slip   - this is just the initial guess, it will start with that
		  and converge to another answer
  dip-slip      - ditto
  opening       - ditto.  leave as zero if you don't want opening


To define the Taiwan LVF, decollement, and another shallower ramp, that all
meet at depth of 41 km, 

decollement, LVF, shallower fault (figure to come?)
http://www.seismo.berkeley.edu/blah/faultgeom.gif

4000  41  180  22  121.022  24.873  122.213  1  1  0
41    41  -45  22  121.022  24.873  122.213  1  1  0
211   41  -11  22  121.022  24.873  122.213  1  1  0

(+z direction is north-ish)
(+y direction is to the west-ish)
(looking to the north, negative dips go to the clockwise direction)

In the output, 

- positive slip is to the +y (west) direction
- is dip slip in the thrust direction (not just horizontal component)?