RSQSim_v0

Description

RSQSim Basics

If using RSQSim you must cite these three papers: (Dieterich, 1995; Dieterich and Richard-Dinger, 2010;  Richard-Dinger and Dieterich, 2012)

RSQSim is a 3D boundary element code which relies on the rate and state friction formulation to generate synthetic earthquake catalogs. RSQSim utilizes quasi-static stress interactions between adjacent fault elements and discrete element states to speed up the computation. It assumes steady-state during the interseismic period, which allows for an analytical solution for time to failure, skipping inter-event time-stepping. During the coseismic period, the elastodynamics are grossly approximated by reducing the rate coefficient 'a' to weaken adjacent fault elements and introducing a parameter for dynamic overshoot. 

Input Data & Fault File Formatting

 1. Quad (Rectangular) Elements:: x y z l w strike dip rake sliprate section_number section_name 

- x, y, z: Coordinates of the center of the fault patch (in meters).

 - l, w: The along-strike and down-dip dimensions of the patch (in meters). 

- strike, dip: Orientation of the fault patch in degrees, adhering to the Aki and Richards (2002) convention. 

- rake: Direction of motion of the hanging wall relative to the footwall in degrees (Aki and Richards, 2002 convention). 

- sliprate: Long-term average slip rate (in m/s). 

2. Triangular Elements Schema: x1 y1 z1 x2 y2 z2 x3 y3 z3 rake sliprate section_number section_name 

- x1 y1 z1 to x3 y3 z3: Explicit 3D coordinates for the three vertices of the triangular element. 

- Ordering Rule: Vertices must be ordered according to the right-hand rule such that they produce an upward-facing normal vector for dipping faults.

 - rake / sliprate: Consistent with the quad format definitions above.