Sequence of sedimentation processes caused by the 1992 Flores tsunami: Evidence from Babi Island

K. Minoura, F. Imamura, T. Takahashi, N. Shuto

研究成果: Article査読

75 被引用数 (Scopus)

抄録

Sedimentation processes caused by a modern tsunami have been discussed from the point of view of geologic and numerical investigations of the 1992 Flores tsunami in Indonesia. Geologic evidence on Babi Island shows an invasion of two waves of different direction and magnitude, which resulted in widespread deposition of marine sand on the north and south-southwest shores. On the latter, coarse and well-sorted carbonate sand containing molluscan shells suggests that much more destructive waves swept across the southern coast, as compared with the northern coast, where the deposit included medium carbonate sand with a silty component. A physical explanation for such destructive waves on the southern coast of Babi is provided by a numerical simulation of the tsunami generation and propagation. The geologic and numerical results indicate that an isolated island surrounded by a circular shoreline or reef edge will be subject to the most destructive waves on the coast on the back side of the island relative to the tsunami source.

本文言語English
ページ(範囲)523-526
ページ数4
ジャーナルGeology
25
6
DOI
出版ステータスPublished - 1997 6

ASJC Scopus subject areas

  • 地質学

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