Numerical simulation of the 1992 Flores tsunami: Interpretation of tsunami phenomena in northeastern Flores Island and damage at Babi Island

Fumihiko Imamura, Edison Gica, Tomoyuki Takahashi, Nobuo Shuto

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

Numerical analysis of the 1992 Flores Island, Indonesia earthquake tsunami is carried out with the composite fault model consisting of two different slip values. Computed results show good agreement with the measured runup heights in the northeastern part of Flores Island, except for those in the southern shore of Hading Bay and at Riangkroko. The landslides in the southern part of Hading Bay could generate local tsunamis of more than 10 m. The circular-arc slip model proposed in this study for wave generation due to landslides shows better results than the subsidence model, It is, however, difficult to reproduce the tsunami runup height of 26.2 m at Riangkroko, which was extraordinarily high compared to other places. The wave propagation process on a sea bottom with a steep slope, as well as landslides, may be the cause of the amplification of tsunami at Riangkroko. The simulation model demonstrates that the reflected wave along the northeastern shore of Flores Island, accompanying a high hydraulic pressure, could be the main cause of severe damage in the southern coast of Babi Island.

Original languageEnglish
Pages (from-to)555-568
Number of pages14
JournalPure and Applied Geophysics PAGEOPH
Volume144
Issue number3-4
DOIs
Publication statusPublished - 1995 Sep 1
Externally publishedYes

Keywords

  • The 1992 Flores earthquake tsunami
  • hydraulic pressure
  • landslide
  • numerical simulation
  • tsunami damage

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

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