Re-evaluating Global Threat of Tsunamis Generated by Air-pressure Waves from Volcano Explosions
Description:
The eruption of Hunga Tonga-Hunga Ha’apai (HTHH) on January 15, 2022, unexpectedly triggered a global tsunami. While the waves had a significant impact along Pacific coasts, they were also detected at gauges worldwide, extending beyond the Pacific region. A similar phenomenon occurred globally on August 27, 1883, when the Krakatau explosion generated one of history's most devastating tsunamis, which was observed and recorded across the world.
Both these global tsunamis were partly caused by air pressure waves resulting from the volcanic eruptions. The HTHH tsunami provided valuable observational data, enabling a thorough quantitative assessment using modeling techniques. Tsunami models, constrained by atmospheric pressure wave (Lamb waves) measurements demonstrated very good comparisons with sea-level recordings globally. We apply the modeling expertise obtained from the analysis of the HTHH volcanic tsunami generated by the air-pressure waves to re-examine the global tsunami generation by the Krakatau volcano. Analyzing these events lays the groundwork for evaluating the potential threat posed by this new type of tsunami, which volcanoes and other large-scale explosive events could produce.
Session: Six Decades of Tsunami Science: From the Source of the 1964 Tsunami to Modern Community Preparedness - I
Type: Oral
Date: 5/2/2024
Presentation Time: 02:15 PM (local time)
Presenting Author: Vasily
Student Presenter: No
Invited Presentation: Yes
Authors
Vasily Titov Presenting Author Corresponding Author vasily.titov@noaa.gov National Oceanic and Atmospheric Administration |
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Re-evaluating Global Threat of Tsunamis Generated by Air-pressure Waves from Volcano Explosions
Session
Six Decades of Tsunami Science: From the Source of the 1964 Tsunami to Modern Community Preparedness