Application of high resolution DEM data to detect rock damage from geomorphic signals along the central San Jacinto Fault

摘要: Abstract We analyze geomorphic properties extracted from LiDAR and SRTM (Shuttle Radar Topography Mission) data to test whether the damage zone along central San Jacinto Fault (SJF) can be resolved with remotely-sensed in a quantitative fashion. The SJF is one of most active faults southern California, well expressed geomorphology fast slip rate, as seen geology by GPS. use ArcMap TauDEM toolbox compare several morphometric parameters, including drainage density (Dd), on both sides fault, using 1 km 5 km buffer for data, respectively. also spatial patterns Dd near two different definitions Dd. high resolution allows us focus single eliminating effects parallel nearby faults. From we find that highest values occur areas between fault strands, followed generally rocks northeast side lowest occurring southwest fault. shows band centered main trace ~ 1 km width. Our results indicate there strong correlation proximity zones structural complexity displaying interpret this largely an effect degree rock damage, these are expected more damaged, field observations support contention. If correct, then it appears damaged. South trifurcation area evidence signal reversed larger scale, inferred possibly caused extension Coyote Creek Clark implications observed asymmetry could geological rupture propagation direction, because preferred direction predicted produce asymmetric structure would recorded volume surrounding