How long did it take tsunami waves from the 2011 Japan earthquake to reach 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.

The tsunami waves generated by the 2011 Japan earthquake reached the coast of Antarctica approximately 18 hours after the initial earthquake occurred. Upon arrival, these waves, which measured roughly 1 foot (0.3 metre) in height, caused a portion of the Sulzberger Ice Shelf to break away from its outer edge.1