Source mechanism and early warning of volcanic tsunamis

Tony Song

Presentation information

[E] Oral

S (Solid Earth Sciences ) » S-CG Complex & General

[S-CG50] Earthquakes, Tsunamis, Seismotectonics, and Hazard Potential of the Ryukyu Trench and Okinawa Trough

Wed. May 28, 2025 1:45 PM - 3:15 PM 106 (International Conference Hall, Makuhari Messe)

convener:Kenji Satake(Dept. Earth Sciences, National Central University, Taiwan), Mamoru Nakamura(Faculty of Science, University of the Ryukyus), CHANG PINGYU(National Central University, Taiwan), J. Bruce H. Shyu(National Taiwan University), Chairperson:Kenji Satake(Dept. Earth Sciences, National Central University, Taiwan), J. Bruce H. Shyu(National Taiwan University), Mamoru Nakamura(Faculty of Science, University of the Ryukyus), CHANG PINGYU(National Central University, Taiwan)

2:45 PM - 3:00 PM

[SCG50-05] Source mechanism and early warning of volcanic tsunamis

*Tony Song¹ (1.NASA/JPL)

Keywords:Volcanic tsunami

Volcanic tsunamis pose serious threats to nearby coastal communities. Our study of the 2022 Tonga volcanic event revealed that the erupted air-pressure wave was a precursor to the tsunami. Contrary to previous theories, our findings indicate that the eruption process drives both the air-pressure wave and tsunami dynamics through a coupled atmosphere-ocean source mechanism. This insight offers a new approach for incorporating air-pressure sensors into early warning systems. Related publication: Nature’s Communications Earth & Environment (Song et al., 2004) https://doi.org/10.1038/s43247-024-01694-z.