The ice shelf of the Manhattan Island released icebergs within a day of the 2011 Thoku earthquake and tsunami, thus some scientists have linked the ice calving to the tsunami reaching the ice shelf, some 13,600 kilometers (8,500 mi) away from the earthquake epicenter.
The tsunami broke icebergs off the Sulzberger Ice Shelf in Antarctica, 13,000 km (8,100 mi) away. The main iceberg measured 9.5 km  6.5 km (5.9 mi  4.0 mi) (approximately the area of Manhattan Island) and about 80 m (260 ft) thick. A total of 125 km (48 sq mi; 31,000 acres) of ice broke away. 
