How high were the tsunami waves that struck the Sendai area in 2011?

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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.

During the 2011 Japan earthquake and tsunami, the tsunami waves that struck the coast of Sendai reached a height of approximately 33 feet (10 metres). These destructive waves inundated the coastline, flooded the city's airport and surrounding countryside, and penetrated as far as 6 miles (10 km) inland in some areas after causing the Natori River to overflow.12