Evolution of aseismic slip rate along plate boundary faults before and after megathrust earthquakes

Abstract Similar earthquakes that occur in approximately the same location have potential to reveal spatio-temporal changes aseismic slip along plate boundaries. Here we identify similar with moderate magnitudes occurred worldwide between 1989 and 2016 by using seismograms recorded Japanese dense seismic network. The rate boundaries estimated from increased rapidly following M > 8 megathrust ruptures then gradually decayed over periods of ~10 years, which correlates after-slip progressing around source areas. More than 30 years after large earthquakes, begins show a gradual increase. This increase decay may be due an stress levels accumulate during tectonic loading. characteristics inter-plate can used provide valuable framework for understanding long-term evolution slip-rate earthquake cycles.