Early Afterslip of the 2015 Mw8.2 Illapel, Chile Megathrust Earthquake: Overlapping Slip Regions Challenge the Fixed Asperity Model

William D Barnhart1, Jessica R Murray2, Richard W Briggs3, Francisco G Gomez4, Charles Miles5, Jerry L Svarc6, Sebastian Riquelme7 and Bryan Stressler1, (1)University of Iowa, Iowa City, IA, United States, (2)USGS Western Regional Offices Menlo Park, Menlo Park, United States, (3)USGS Central Region Offices Denver, Denver, CO, United States, (4)Organization Not Listed, Washington, DC, United States, (5)University of Missouri Columbia, Columbia, MO, United States, (6)California Geological Survey Menlo Park, Menlo Park, CA, United States, (7)University of Chile, National Seismological Center, Santiago, Chile