[CIG-SHORT] fault edge motion

[Huihui Weng]

Hi Brad,

The two faults are parallel and adjacent as the attached png file shows. The overlap of the two faults is the fault edge (one line buried inside the domain), which I set as fault edge in the cfg file. Other boundaries of the two faults are intersecting with the domain boundaries, thus they are not buried fault edges. Part of the scripts are as fellow:

[pylithapp.timedependent]
interfaces = [fault_up,fault_down]
[pylithapp.timedependent.interfaces]
fault_up = pylith.faults.FaultCohesiveDyn
fault_down = pylith.faults.FaultCohesiveKin

[pylithapp.timedependent.interfaces.fault_up]
label = fault_up
edge = fault_edge
[pylithapp.timedependent.interfaces.fault_down]
label = fault_down
edge = fault_edge


The nodes of the fault edge (the white line) don’t slip, causing a slip “gap” between the two faults. If I comment either of the lines of "edge = fault_edge” in the script, it fails to run.

In addition, how about the case if the two faults bend, such as one kink at the fault edge?  In fact, this case is similar with the example in the PyLith manual, i.e., ~/examples/2d/subduction/step03.cfg, except that I change it to 3D and change one kinematic fault to a dynamic fault. Thanks.

Best regards,
Huihui


> On 25 Oct 2017, at 11:26 PM, Brad Aagaard <baagaard at usgs.gov> wrote:
> 
> Huihui,
> 
> I do not know what you mean by "two adjacent planar faults". Are the faults parallel? perpendicular? Do they intersect? Please send a diagram of your fault geometry and indicate which edges you marked as buried fault edges.
> 
> Thanks,
> Brad
> 
> 
> On 10/25/2017 02:25 AM, Huihui Weng wrote:
>> Dear all,
>> I tried to build a model with two adjacent planar faults, one is kinematic fault and the other is dynamic fault. The PyLith of new version requires me to provide the fault edge, i.e., the group of nodes in the line that connects the two faults. But I find the fault edge always keep fixed. How can I set up the model to make the fault edge move to fill the “gap” of slip between these two faults? It does seem it is OK for 2D models of older Pylith versions. Thanks.
>> Best regards,
>> Huihui
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