Shatsky Rise

The Shatsky Rise is an oceanic plateau located southeast of Japan on the floor of the Pacific Ocean. It includes what may be the largest volcano yet discovered on Earth, the Tamu Massif. The Rise and its volcanics are hypothesized to have formed during the Late Jurassic to Early Cretaceous epochs at the triple junction of three tectonic plates: the Pacific, the Farallon, and the Izanagi.