Current research projects: (1) source mechanism of episodic slow slip events and non-volcanic tremors in subduction zones and their relation to megathrust earthquakes, (2) pore fluid pressure coupling with frictional strength and slip and application to megathrust ruptures, (3) effects of subducted seamounts on seismic coupling, (4) frictional behavior of oceanic transform faults and earthquake scaling characteristics, (5) dynamic and static stress triggering of shallow fault creep events and earthquakes, and (6) glacier-bedrock sliding process