Figure 1
From: Resolving Fine-Scale Heterogeneity of Co-seismic Slip and the Relation to Fault Structure
Correlation maps for the 1992 Landers and 1999 Hector Mine earthquakes.
Deformation maps showing north-south (a,c, left column) and east-west (b,d, right column) component of displacement with positive values indicating movement to the north and east, respectively for the (a,b, top) Landers and (c,d, bottom) Hector Mine events. The inset map in a, top right, shows the regional location of the 1992 Landers28 and 1999 Hector Mine29 rupture in red lines overlaid onto a hillshade10 m national elevation dataset digital elevation model, with yellow stars denoting the location of the epicenter. The inset figures in (a,c) show fault-parallel displacement (black line) within a 138 m wide stacked profile (also shown on the correlation maps as a black rectangle), illustrating how fault offset is measured using linear regressions (red lines), which are manually fit to the deformation signal on either side of the fault. A total of 1081 profiles were measured for Landers and 470 for Hector Mine; these measurements were compiled along-strike to create the co-seismic slip profiles shown in Fig. 2a,b. The displacement maps were computed using COSI-Corr and plotted within ENVI 4.8 (http://www.exelisvis.com/ProductsServices/ENVIProducts/ENVI.aspx) and Arcmap 10.1 (http://www.esri.com/software/arcgis/arcgis-for-desktop). Air photo data compiled by the U.S. Geological Survey (http://www.usgs.gov).
