Convergent-plate boundary—complicated boundaryShallow—both the downgoing and overriding plateNormal faults form as the downgoing slab bends.Large thrust faults occur at the contact between plates. The subducting slab bends the overriding plate downward.The overriding plate can snap back, creating a huge earthquake.Cascadia (1700) ~M9.0Chile (1960) M9.5Alaska (1964) M9.2Sumatra (2004) M9.1Chile (2010) M8.8NE Japan (2011) M9.0