Tsunami Triggered by the Lamb Wave From the 2022 Tonga Volcanic Eruption and Transition in the Offshore Japan Region
Abstract The 2022 volcanic eruption in Tonga caused an unusually large tsunami around the Pacific. It travels with a faster apparent velocity and has larger amplitudes at long distances than what would be expected from a conventional tsunami from the volcanic source. This tsunami was generated by th...
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| Format: | Article |
| Language: | English |
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Wiley
2022-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2022GL098752 |
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| author | Masumi Yamada Tung‐Cheng Ho Jim Mori Yasuhiro Nishikawa Masa‐Yuki Yamamoto |
| author_facet | Masumi Yamada Tung‐Cheng Ho Jim Mori Yasuhiro Nishikawa Masa‐Yuki Yamamoto |
| author_sort | Masumi Yamada |
| collection | DOAJ |
| description | Abstract The 2022 volcanic eruption in Tonga caused an unusually large tsunami around the Pacific. It travels with a faster apparent velocity and has larger amplitudes at long distances than what would be expected from a conventional tsunami from the volcanic source. This tsunami was generated by the moving atmospheric Lamb wave and traveled at the speed of the Lamb wave (0.31 km/s). Japanese data showed the amplitude of this first tsunami becomes small when approaching the coast, due to the weaker air‐sea coupling at the shallow depth. This wave split when passing the continental slope, and traveled at the speed of the ocean gravity wave. Therefore, the tsunami observed at the coast is delayed by thousands of seconds from the passage of the Lamb wave. Tsunamis generated by this atmospheric mechanism have not been previously observed by modern digital recording systems and should be considered in the tsunami warning systems. |
| format | Article |
| id | doaj-art-de58548a539c4c1fab0f14e67494bddb |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2022-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-de58548a539c4c1fab0f14e67494bddb2025-08-20T02:27:42ZengWileyGeophysical Research Letters0094-82761944-80072022-08-014915n/an/a10.1029/2022GL098752Tsunami Triggered by the Lamb Wave From the 2022 Tonga Volcanic Eruption and Transition in the Offshore Japan RegionMasumi Yamada0Tung‐Cheng Ho1Jim Mori2Yasuhiro Nishikawa3Masa‐Yuki Yamamoto4Disaster Prevention Research Institute Kyoto University Uji JapanDisaster Prevention Research Institute Kyoto University Uji JapanDisaster Prevention Research Institute Kyoto University Uji JapanSchool of System Engineering Kochi University of Technology Kami JapanSchool of System Engineering Kochi University of Technology Kami JapanAbstract The 2022 volcanic eruption in Tonga caused an unusually large tsunami around the Pacific. It travels with a faster apparent velocity and has larger amplitudes at long distances than what would be expected from a conventional tsunami from the volcanic source. This tsunami was generated by the moving atmospheric Lamb wave and traveled at the speed of the Lamb wave (0.31 km/s). Japanese data showed the amplitude of this first tsunami becomes small when approaching the coast, due to the weaker air‐sea coupling at the shallow depth. This wave split when passing the continental slope, and traveled at the speed of the ocean gravity wave. Therefore, the tsunami observed at the coast is delayed by thousands of seconds from the passage of the Lamb wave. Tsunamis generated by this atmospheric mechanism have not been previously observed by modern digital recording systems and should be considered in the tsunami warning systems.https://doi.org/10.1029/2022GL098752Hunga Tonga‐Hunga Ha'apaitsunamivolcanic erruptionLamb waveatmospheric pressureshock wave |
| spellingShingle | Masumi Yamada Tung‐Cheng Ho Jim Mori Yasuhiro Nishikawa Masa‐Yuki Yamamoto Tsunami Triggered by the Lamb Wave From the 2022 Tonga Volcanic Eruption and Transition in the Offshore Japan Region Geophysical Research Letters Hunga Tonga‐Hunga Ha'apai tsunami volcanic erruption Lamb wave atmospheric pressure shock wave |
| title | Tsunami Triggered by the Lamb Wave From the 2022 Tonga Volcanic Eruption and Transition in the Offshore Japan Region |
| title_full | Tsunami Triggered by the Lamb Wave From the 2022 Tonga Volcanic Eruption and Transition in the Offshore Japan Region |
| title_fullStr | Tsunami Triggered by the Lamb Wave From the 2022 Tonga Volcanic Eruption and Transition in the Offshore Japan Region |
| title_full_unstemmed | Tsunami Triggered by the Lamb Wave From the 2022 Tonga Volcanic Eruption and Transition in the Offshore Japan Region |
| title_short | Tsunami Triggered by the Lamb Wave From the 2022 Tonga Volcanic Eruption and Transition in the Offshore Japan Region |
| title_sort | tsunami triggered by the lamb wave from the 2022 tonga volcanic eruption and transition in the offshore japan region |
| topic | Hunga Tonga‐Hunga Ha'apai tsunami volcanic erruption Lamb wave atmospheric pressure shock wave |
| url | https://doi.org/10.1029/2022GL098752 |
| work_keys_str_mv | AT masumiyamada tsunamitriggeredbythelambwavefromthe2022tongavolcaniceruptionandtransitionintheoffshorejapanregion AT tungchengho tsunamitriggeredbythelambwavefromthe2022tongavolcaniceruptionandtransitionintheoffshorejapanregion AT jimmori tsunamitriggeredbythelambwavefromthe2022tongavolcaniceruptionandtransitionintheoffshorejapanregion AT yasuhironishikawa tsunamitriggeredbythelambwavefromthe2022tongavolcaniceruptionandtransitionintheoffshorejapanregion AT masayukiyamamoto tsunamitriggeredbythelambwavefromthe2022tongavolcaniceruptionandtransitionintheoffshorejapanregion |