Articles | Volume 22, issue 3
Research article
01 Apr 2022
Research article |  | 01 Apr 2022

Characteristics of two tsunamis generated by successive Mw 7.4 and Mw 8.1 earthquakes in the Kermadec Islands on 4 March 2021

Yuchen Wang, Mohammad Heidarzadeh, Kenji Satake, and Gui Hu

Data sets

Sea Level Station Monitoring Facility IOC

M 8.1 - Kermadec Islands, New Zealand USGS

Model code and software

Global ocean & land terrain models GEBCO

Short summary
Tsunami waveforms contain the features of its source, propagation path, and local topography. On 4 March 2021, two tsunamis were generated by earthquakes in the Kermadec Islands, New Zealand, within 2 h. This rare case gives us a valuable opportunity to study the characteristics of two tsunamis. We analyzed the records of two tsunamis at tide gauges with spectral analysis tools. It is found that two tsunamis superpose during the few hours after the arrival of the second tsunami.
Final-revised paper