Question: what type of plate boundary is located along the sumatra trench?
Answer: The red star shows the epicenter of the 2004 earthquake. This plate boundary is called the Sumatran Subduction Trench, and it is where the oceanic Indian/Australian plate is slowly descending beneath (subducting under) the continental Eurasian plate at a rate of about 4.5 cm/year (2 inches/year).