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 language | English |
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Pages (from-to) | 147-158 |
Number of pages | 12 |
Journal | ISET Journal of Earthquake Technology |
Volume | 42 |
Issue number | 4 |
Publication status | Published - 2005 Dec |
Keywords
- Coastal Topography
- Earthquake Tsunami
- Sand Dome
- Tsunami Deposit
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction