A sloshing induced Tsunami: 2018 Palu Bay event

Han，Peida1; Yu，Heng2; Yu，Xiping3

2021-12-01

10.1016/j.apor.2021.102915

APPLIED OCEAN RESEARCH   影响因子和分区

0141-1187

A disastrous tsunami is generally known as the ocean water response to an offshore fault rupture as the consequence of a submarine earthquake. Such a physical understanding, however, cannot explain the generation of the 2018 Sulawesi earthquake induced Palu Bay tsunami. In this study, it is demonstrated that the sloshing effect dominates a tsunami event if it occurs in a semi-closed water body near the epicenter and the ground motion triggered by the earthquake is strong enough in the horizontal directions. The 2018 Palu Bay tsunami became disastrous since the sloshing effect played a significant role while landslides also contributed to the big runup at some particular locations. The present study is significant since sloshing is usually considered to play a minor role in amplifying a tsunami wave and has not been included in existing tsunami warning systems. Owing to such a limitation, the 2018 Palu Bay tsunami event was not correctly predicted at all. To prevent a future tragedy, an urgent update of the worldwide tsunami warning system in service may have to be performed to include an option for possible consideration of the sloshing effect.

2018 Sulawesi earthquake Numerical model Palu Bay Sloshing effect Tsunami generation

EI ; SCI

英语

通讯

WOS:000710658200002

20214311054145

Earthquakes ; Offshore oil well production

Seawater, Tides and Waves:471.4 ; Seismology:484 ; Oil Field Production Operations:511.1

ENGINEERING

2-s2.0-85117407584

Scopus

1.State Key Laboratory of Hydroscience and Engineering,Department of Hydraulic Engineering,Tsinghua University,China
2.State Key Laboratory of Hydraulic Engineering Simulation and Safety,School of Civil Engineering,Tianjin University,China
3.Department of Ocean Science and Engineering,Southern University of Science and Technology,China

Han，Peida,Yu，Heng,Yu，Xiping. A sloshing induced Tsunami: 2018 Palu Bay event[J]. APPLIED OCEAN RESEARCH,2021,117.

Han，Peida,Yu，Heng,&Yu，Xiping.(2021).A sloshing induced Tsunami: 2018 Palu Bay event.APPLIED OCEAN RESEARCH,117.

Han，Peida,et al."A sloshing induced Tsunami: 2018 Palu Bay event".APPLIED OCEAN RESEARCH 117(2021).