Potential tsunami hazard of the southern Vanuatu subduction zone: tectonics, case study of the Matthew Island tsunami of 10 February 2021 and implication in regional hazard assessment

Roger, Jean; Pelletier, Bernard; Gusman, Aditya; Power, William; Wang, Xiaoming; Burbidge, David; Duphil, Maxime

doi:https://doi.org/10.5194/nhess-23-393-2023

Articles | Volume 23, issue 2

https://doi.org/10.5194/nhess-23-393-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Tsunamis: from source processes to coastal hazard and...

https://doi.org/10.5194/nhess-23-393-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 23, issue 2

Research article

|

02 Feb 2023

Research article |

| 02 Feb 2023

Potential tsunami hazard of the southern Vanuatu subduction zone: tectonics, case study of the Matthew Island tsunami of 10 February 2021 and implication in regional hazard assessment

Jean Roger, Bernard Pelletier, Aditya Gusman, William Power, Xiaoming Wang, David Burbidge, and Maxime Duphil

Data sets

Digital Elevation Model of Norfolk Island and Sydney Bay, Australia J. Roger https://doi.org/10.21420/H889-5393

ETOPO1 1 Arc-Minute Global Relief Model: Procedures, Data Sources and Analysis C. Amante and B. W. Eakins https://doi.org/10.7289/V5C8276M

Sea level station monitoring facility VLIZ (Flanders Marine Institute)/IOC (Intergovernmental Oceanographic Commission) https://doi.org/10.14284/482

NZ Deep-ocean Assessment and Reporting of Tsunami (DART) Data set GNS Science https://doi.org/10.21420/8TCZ-TV02

The GEBCO_2021 Grid - a continuous terrain model of the global oceans and land GEBCO Bathymetric Compilation Group 2021 https://doi.org/10.5285/c6612cbe-50b3-0cff-e053-6c86abc09f8f

Short summary

On 10 February 2021 a magnitude 7.7 earthquake occurring at the southernmost part of the Vanuatu subduction zone triggered a regional tsunami that was recorded on many coastal gauges and DART stations of the south-west Pacific region. Beginning with a review of the tectonic setup and its implication in terms of tsunami generation in the region, this study aims to show our ability to reproduce a small tsunami with different types of rupture models and to discuss a larger magnitude 8.2 scenario.