What are the name of the techtonic plates that caused the Samoan tsunami?

The Samoan tsunami was primarily caused by the interaction of the Pacific Plate and the Indo-Australian Plate. The movement and subduction of these tectonic plates along the Tonga Trench generated significant seismic activity, leading to the tsunami. This region is known for its complex tectonic activity, which contributes to the occurrence of earthquakes and tsunamis.