The ice shelf released icebergs within a day of the 2011 Tōhoku earthquake and tsunami . Scientists have linked the ice calving to the tsunami reaching the ice shelf , some away from the earthquake epicenter . The main iceberg was approximately the area of Manhattan Island . In total , the icebergs calved from the ice shelf totalled an area of nearly 125 km2 ( 48 mi2 ) . This section of the shelf had not moved since 1946
2011 Tōhoku earthquake and tsunami
2011 Tōhoku earthquake and tsunami
Sulzberger Bay