19–23 Jun 2023
Hofburg Palace & Online
Europe/Vienna timezone

Acoustic Data Analysis of the Tonga Submarine Volcanic Eruptions in January 2022

20 Jun 2023, 09:00


Board: 27
E-poster T1.4 Multi-Discipline Studies of the Earth’s Subsystems Lightning talks: P1.3, P1.4, P5.2


Mr Uchenna Onwuhaka Madu (Nigeria Atomic Energy Commission (NAEC))


One of the sources of acoustic signals is underwater volcanic eruptions. Climatic phase of such underwater eruptions results in an ash cloud being ejected into the stratosphere thus generating infrasound signals while at the same time generating acoustic signals. The active volcano in Hunga Tonga-Hunga Ha'apai (HTHH) one of the Tonga Island groups erupted violently on 15 January 2022 triggering tsunamis. International Monitoring System (IMS) infrasound and hydroacoustic stations recorded the event from the foreshock to aftershock. Submarine and subaerial components were identified in the study of acoustic signals obtained from these IMS stations. A complex source sequence was detected by the stations analysed during the eruption phase. DTK-GPMCC was used to study the wave properties with the time frequency bands at lower frequency (0.001-1Hz). The wave parameters of back-azimuth, frequency, the root-mean-square amplitude, and the apparent velocity were calculated. Result of the event showed acoustic gravity, Lamb wave and infrasonic features. This study is an indication of the importance of IMS stations towards the understanding of submarine volcanic eruptions.

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Importance of International Monitoring System stations towards the understanding of submarine volcanic eruptions.

E-mail [email protected]

Primary author

Mr Uchenna Onwuhaka Madu (Nigeria Atomic Energy Commission (NAEC))


Mr Awwal Bisallah (Nigeria Atomic Energy Commission (NAEC)) Mr Chad Chinaemelu Anyaegbu (Nigeria Atomic Energy Commission (NAEC))

Presentation materials