Evaluation of tsunami wave energy generated by earthquakes in the Makran subduction zone

Amin Rashidi, Zaher Hossein Shomali, Denys Dutykh, Nasser Keshavarz Faraj Khah

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The MAKRAN subduction zone, an approximate 1000 km section of the EURASIAN–ARABIAN plate, is located offshore of SOUTHERN IRAN and PAKISTAN. In 1945, the MAKRAN subduction zone (MSZ) generated a tsunamigenic earthquake with a magnitude of Mw 8.1. The region has also experienced large historical earthquakes but the data regarding these events are poorly documented. Therefore, the need to investigate tsunamis in MAKRAN must be taken into serious consideration. Using hydrodynamic numerical simulation, we evaluate the tsunami wave energy generated by bottom motion for a tsunamigenic source model distributed along the full length of the MAKRAN subduction zone. The whole rupture of the plate boundary is divided into 20 segments with width of the order of 200 km and a co-seismic slip of 10 m but with various lengths. Exchanges between kinetic and potential components of tsunami wave energy are shown. The total tsunami wave energy displays only 0.33 % of the seismic energy released from the earthquake source. As a result, for every increase in magnitude by one unit, the associated tsunami wave energy becomes about 103 times greater.

Original languageBritish English
Pages (from-to)131-139
Number of pages9
JournalOcean Engineering
Volume165
DOIs
StatePublished - 1 Oct 2018

Keywords

  • Co-seismic displacement
  • Makran region
  • Tsunami modeling
  • Tsunami wave
  • Wave energy

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