On March 22, 2011, a M=9.0 great subduction zone earthquake occurred along the Japan trench, where the Pacific plate subducts westward beneath the North America plate. These plates converge about 92 mm/yr. The Great East Japan Earthquake. https://earthquake.usgs.gov/earthquakes/eventpage/official20110311054624120_30/executive I updated … Continue reading The 11 March 2011 Tōhoku-oki earthquake