Gridded Surface

To facilitate modeling larger earthquakes of various sizes, OpenSHA treats fault and rupture surfaces as gridded surfaces. Gridding makes it easier to both represent arbitrary degrees of surface complexity, and to reference a subset of a larger surface (e.g., for when an Earthquake Rupture occurs on only part of a fault). Depending on the type of Fault being gridded, OpenSHA can accomodate evenly discretized grids (e.g. the fault surface definitions of Frankel and Stirling) or approximately uniformely spaced grids (e.g., for subduction zones).