25. Tsunami Devastation - Sumatra. Check and double-click the Regional Plate Tectonics map overlay and the Epicenter placemark to fly to the Sumatra region that was devastated by a tsunami in late 2004. Turn on the Earthquakes layer in the Places panel. Which tectonic plate was subducted beneath which overriding tectonic plate at this locality to produce this massive earthquake? Notes: subduction zones are delineated on geologic maps by a line with triangles/teeth pointing toward the subduction zone. Recall from Chapter 2 of your textbook that volcanoes form on the overriding plate. a. Indian Plate is being subducted beneath the Burma Plate b. Burma Plate is being subducted beneath the Indian Plate c. Sunda Plate is being subducted beneath the Burma Plate d. Burma Plate is being subducted beneath the Sunda Plate.