[CIG-SHORT] trivial question

[Brad Aagaard]

Roby,

Do you really mean both faults dip south or one dips south and the other 
dips north?

The fault normal direction is picked by how we insert the cohesive 
cells. As a result we don't know which direction of the two possible 
directions it will point. We pick the dip and along-strike directions to 
give the correct sense of motion (positive left lateral and positive 
reverse). This means you need to examine all three directions to check 
the fault orientation. If you want to plot the slip and/or traction 
vectors on the hanging wall, then you might need to flip the signs of 
the slip and tractions so that they are plotted for the hanging wall 
(one possible fault normal direction) and not the footwall (the other 
possible fault normal direction).

Regards,
Brad

On 1/29/13 10:46 PM, Roby Douilly wrote:
> Hi Brad,
>
> I have two faults, one dipping south and the other one dipping south. In
> paraview, I output the dip_dir for both of them. For the south dipping
> fault the dip_dir is upward but for the north dipping fault the dip_dir
> is downward. Is it suppose to be like that? For the normal_dir and
> strike_dir it is the same but the difference is only for the dip_dir.
>
>
> Roby
>
> ---------------------------------------------------------------------------------
> Roby Douilly
> Graduate Student
> Department of Earth, Atmospheric, and Planetary Sciences
> Purdue University
> 550 Stadium Mall Dr.
> West Lafayette, IN 47907-2051
> rdouilly at purdue.edu <mailto:rdouilly at purdue.edu>
>
>
>
>