Preliminary estimation of the tsunami hazards associated with the Makran subduction zone at the northwestern Indian Ocean |
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| Authors: | Mohammad Heidarzadeh Moharram D Pirooz Nasser H Zaker Ahmet C Yalciner |
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| Institution: | (1) School of Civil Engineering, College of Engineering, University of Tehran, Enghelab Ave., P.O. Box 11155-4563, Tehran, Iran;(2) Graduate Faculty of Environment, University of Tehran, Tehran, Iran;(3) Department of Civil Engineering, Ocean Engineering Research Center, Middle East Technical University, 06531 Ankara, Turkey |
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| Abstract: | We present a preliminary estimation of tsunami hazard associated with the Makran subduction zone (MSZ) at the northwestern
Indian Ocean. Makran is one of the two main tsunamigenic zones in the Indian Ocean, which has produced some tsunamis in the
past. Northwestern Indian Ocean remains one of the least studied regions in the world in terms of tsunami hazard assessment.
Hence, a scenario-based method is employed to provide an estimation of tsunami hazard in this region for the first time. The
numerical modeling of tsunami is verified using historical observations of the 1945 Makran tsunami. Then, a number of tsunamis
each resulting from a 1945-type earthquake (M
w 8.1) and spaced evenly along the MSZ are simulated. The results indicate that by moving a 1945-type earthquake along the
MSZ, the southern coasts of Iran and Pakistan will experience the largest waves with heights of between 5 and 7 m, depending
on the location of the source. The tsunami will reach a height of about 5 m and 2 m in northern coast of Oman and eastern
coast of the United Arab Emirates, respectively. |
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| Keywords: | Tsunami Indian Ocean Makran subduction zone (MSZ) Deterministic tsunami hazard assessment Numerical modeling |
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