The Geospatial Information Authority of Japan reported immediate subsidence caused by the 2011 Tōhoku earthquake . In Northern Japan , subsidence of 0.50 m ( 1.64 ft ) was observed on the coast of the Pacific Ocean in Miyako , Tōhoku , while Rikuzentakata , Iwate measured 0.84 m ( 2.75 ft ) . In the south at Sōma , Fukushima , 0.29 m ( 0.95 ft ) was observed . The maximum amount of subsidence was 1.2 m ( 3.93 ft ) , coupled with horizontal diastrophism of up to 5.3 m ( 17.3 ft ) on the Oshika Peninsula in Miyagi Prefecture
2011 Tōhoku earthquake
2011 Tōhoku earthquake and tsunami
Subsidence