Tsunami potential in the Makran subduction zone: Amplification effects from earthquake rupture directivity and speed

Chen, Zhanying1,2,3; Lin, Jian1,2,4; Qiu, Qiang1,2,3; Zhou, Zhiyuan4; Zhang, Fan1,2,3

2023-11-01

10.1111/ter.12698

TERRA NOVA   影响因子和分区

0954-4879

1365-3121

The Makran subduction zone has historically experienced major earthquakes and tsunamis. Here, we integrate fault morphology, InSAR measurements, and high-resolution bathymetry to quantitively evaluate potential future tsunami sources and tsunami wave characteristics. We systematically investigate how earthquake rupture speed and direction could affect tsunami hazards for the Makran region. Our analyses reveal the following new understanding: (1) The estimated maximum slip deficit in the Makran region southeast of the Gwadar port is >4 m since the last significant 1851 rupture; (2) Earthquakes with finite rupture speed investigated in the range of 300-1,000 m/s are calculated to generate higher tsunami waves than the static rupture model; (3) For an east-to-west rupture direction, the tsunami waves are calculated to arrive at the Gwadar port 3-5 mins later but with higher waves than the static rupture model. Together, our results highlight the importance of the source earthquake rupture speed and directivity in controlling tsunamigenic effects.

earthquake rupture speed and direction Makran subduction zone numerical modeling tsunami hazard assessment

SCI

英语

通讯

China-Pakistan Joint Research Center["41890813","92258303","41976066","41976064","42076059"] ; National Natural Science Foundation of China["QYZDY-SSW-DQC005","133244KYSB20180029","131551KYSB20200021","Y4SL021001"]

Geology

Geosciences, Multidisciplinary

WOS:001109277600001

WILEY

GEOSCIENCES

2-s2.0-85177563310

Web of Science

1.Chinese Acad Sci, South China Sea Inst Oceanol, Innovat Acad South China Sea Ecol & Environm Engn, Key Lab Ocean & Marginal Sea Geol, Guangzhou, Peoples R China
2.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, Islamabad, Pakistan
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen, Peoples R China

Chen, Zhanying,Lin, Jian,Qiu, Qiang,et al. Tsunami potential in the Makran subduction zone: Amplification effects from earthquake rupture directivity and speed[J]. TERRA NOVA,2023,36(3):201-209.

Chen, Zhanying,Lin, Jian,Qiu, Qiang,Zhou, Zhiyuan,&Zhang, Fan.(2023).Tsunami potential in the Makran subduction zone: Amplification effects from earthquake rupture directivity and speed.TERRA NOVA,36(3),201-209.

Chen, Zhanying,et al."Tsunami potential in the Makran subduction zone: Amplification effects from earthquake rupture directivity and speed".TERRA NOVA 36.3(2023):201-209.