3:00 PM - 3:15 PM
[SCG53-30] Physical and geological entity of brittle-ductile heterogeneous fault zones at transition depth
Keywords:Slow earthquakes, Brittle-ductile heterogeneity, Model
By considering a simplified one degree of freedom system consisting of a spring, mass, a dash pod and frictional slider, we derive an equation of motion. By assuming the linearity of the system, I obtained an analytical solution of the system. Analyses of the obtained solution show that following phenomenon are natural consequences of interplay between velocity strengthening behaviors and the fraction of the brittle patches as increasing depth and temperature. Such explained phenomenon include recurrence intervals, amount of stress drop, sensitivity to tides, duration of events, and seismic efficiency. Relative depths of megathrust earthquakes, long-term and short-term slow slip events and tremor generating regions, which are puzzling and controversial, are also explained.