2011 Tōhoku earthquake and tsunami 2011 Tōhoku earthquake and tsunami The was a magnitude 9.0–9.1 (M) undersea megathrust earthquake off the coast of Japan that occurred at 14:46 JST (05:46 UTC) on Friday 11 March 2011, with the epicentre approximately east of the Oshika Peninsula of Tōhoku and the hypocenter at an underwater depth of approximately . The earthquake is often referred to in Japan as the and is also known as the 2011 Tōhoku earthquake, and the 3.11 earthquake. It was the most powerful earthquake ever recorded in Japan, and the fourth most powerful earthquake in the world since modern record-keeping began in 1900.
2011 Guerrero earthquake similar intensities to that of the Guerrero earthquake are required per year to total the energy unleashed by a magnitude 7.5 event. Many locals perceived an apparent increase in recent earthquake occurrences, though at the time seismologists registered normal levels of seismic activity in the area. In 2009, a similar magnitude 5.8 M earthquake struck Guerrero near Acapulco at a depth of 35 km (22 mi), killing at least two people. 2011 Guerrero earthquake The 2011 Guerrero earthquake struck with a moment magnitude of 5.7 in southern Mexico at on Thursday, 5 May. It was positioned west of Ometepec, Guerrero,