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A gigantic boulder transported by the 2011 Tohoku‐oki tsunami
Author(s) -
Iwai Shohei,
Goto Kazuhisa,
Ishizawa Takashi
Publication year - 2019
Publication title -
island arc
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.554
H-Index - 58
eISSN - 1440-1738
pISSN - 1038-4871
DOI - 10.1111/iar.12321
Subject(s) - geology , seismology , period (music) , tsunami wave , archaeology , geography , physics , acoustics
At the Koikorobe coast in Iwate Prefecture, we identified two especially large boulders. A boulder, 13.3 × 9.82 × 5.65 m 3 and estimated to be 1454 t, is likely not to have been moved by the 2011 tsunami according to the comparison of pre‐tsunami and post‐tsunami aerial photographs between 1977 and 2013. On the other hand, the other boulder, 10.0 × 6.61 × 5.3 m 3 and estimated to be 690 t, was moved during the same period. This is the largest natural boulder that has been moved by a recent tsunami in the world.