A huge sand dome formed by the 1854 earthquake tsunami in Suruga bay, central Japan

Daisuke Sugawara, Koji Minoura, Fumihiko Imamura, Tomoyuki Takahashi, Nobuo Shuto

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The 1854 Ansei-Tokai earthquake brought massive destruction to Suruga Bay, central Japan. The earthquake triggered a large-scale tsunami, which surged over the Pacific coast of Japan. Waves exceeding 13.2 m in height attacked Iruma, southeastern coast of Suruga Bay, and provoked peculiar types of tsunami sedimentation. On the coast of Iruma, a huge mound of shoreface sand, reaching more than 11.2 m above sea level, appeared after the tsunami run-up. We performed a historical and sedimentological survey to clarify the origin of the mound. Result of a field excavation and submarine investigation suggests that the sand came from the seafloor with a water depth of 20 to 30 m, and historical data illustrates a dramatic change of the landform by the tsunami run-up. Numerical examination of the tsunami implies that the coastal topography played an important role in excitation of the tsunami, and it induced the characteristic tsunami sedimentation.

Original languageEnglish
Pages (from-to)147-158
Number of pages12
JournalISET Journal of Earthquake Technology
Volume42
Issue number4
Publication statusPublished - 2005 Dec 1

Keywords

  • Coastal Topography
  • Earthquake Tsunami
  • Sand Dome
  • Tsunami Deposit

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

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