M8.4 - Japan, 1933
3,000 deaths. One of the world's deadliest earthquakes.
Because this earthquake occurred about 290 km (180 mi) off the coast of Honshu, most of the casualties and damage were caused by the large tsunami that was generated, instead of directly from the earthquake itself. About 5,000 houses in Japan were destroyed, of which nearly 3,000 were washed away. Maximum wave heights of 28.7 m (94 ft) were observed at Ryori Bay, Honshu. The tsunami also caused slight damage in Hawaii, where a 2.9-meter (9.5-foot) was recorded at Napoopoo.
Source : http://earthquake.usgs.gov/learn/today/