Triggering an unexpected earthquake in an uncoupled subduction zone
Matthew Herman, Kevin P. Furlong
Abstract
7.6 strike-slip earthquake within the Shumagin Gap. Stress modeling indicates that this strike-slip earthquake is in fact favored if the Shumagin Gap has low coupling, whereas a highly coupled Shumagin Gap inhibits that type and location of earthquake. The initial thrust earthquake and its afterslip enhanced the strike-slip loading within the subducting slab, helping to trigger the October event.
Topics & Concepts
SubductionGeologySeismologyEpisodic tremor and slipCoupling (piping)TectonicsMaterials scienceMetallurgyearthquake and tectonic studiesHigh-pressure geophysics and materialsEarthquake Detection and Analysis