How did the 2011 tsunami affect the Sulzberger Ice Shelf in Antarctica?

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earthquake damage, Honshu, Japan, 2011 — Japan earthquake and tsunami of 2011 Aerial view of damage to a portion of the northeastern coast of Honshu, Japan, following the offshore earthquake and resultant tsunami there on March 11, 2011.

Approximately 18 hours after the 2011 Japan earthquake, tsunami waves measuring roughly 1 foot (0.3 metre) in height reached the coast of Antarctica. The energy from these waves caused a portion of the Sulzberger Ice Shelf to break off from its outer edge.1