Coseismic displacement measurement of the 2010 El Mayor, Mexico earthquake by subpixel correlation from optical satellite images

摘要

In order to grasp the quantitative and spatial information of the earth surface deformation due to earthquakes, well-georectified remotely sensed data with high pixel resolution taken before and after the event are useful. Among satellite optical sensors, Terra and PRISM loaded on Terra and ALOS, respectively, have the function of along-track stereoscopic shooting to generate a digital elevation model (DEM), then an orthorectified image based on derived DEM is also created by a single fight observation. This paper performs to apply the subpixel-based image processing using pre- and post-earthquake orthorectified images to map the displacement distribution around the fault rupture region of the 2010 El Mayor (Baja) earthquake.