What happened in 2011 in Japan?

Devastating Tsunami in Japan (2011)

A significant seismic upthrust of between 6 to 8 meters (20 to 26 feet) occurred along a 180-kilometer (110-mile) stretch of seabed, located 60 kilometers (37 miles) off the east coast of Tōhoku. This geological event triggered a powerful tsunami that caused widespread devastation along Japan's Pacific coastline.