2022-05-12アメリカ・ローレンスリバモア国立研究所(LLNL)
ローレンス・リバモア国立研究所（LLNL）の科学者Keehoon Kimを含む17カ国の国際チームによる新しい研究は、全球気圧計が記録した大気圧波に基づいて、フンガの爆発規模が1883年のクラカトア噴火と同等であることを実証している。この研究は、5月12日発行のScience誌に掲載された。
＜関連情報＞
- https://www.llnl.gov/news/big-it-gets-hunga-volcano-comparable-krakatoa
- https://www.science.org/doi/10.1126/science.abo7063
2022年1月トンガ・フンガ噴火の大気波動と全球地震音響の観測 Atmospheric waves and global seismoacoustic observations of the January 2022 Hunga eruption, Tonga
ROBIN S. MATOZA,DAVID FEE,JELLE D. ASSINK,ALEXANDRA M. IEZZI,DAVID N. GREEN ,KEEHOON KIM ,LIAM TONEY,THOMAS LECOCQ,SIDDHARTH KRISHNAMOORTHY, [AND] DAVID C. WILSON, +67 authors
Science Published:12 May 2022
DOI: 10.1126/science.abo7063
Abstract
The 15 January 2022 climactic eruption of Hunga volcano, Tonga, produced an explosion in the atmosphere of a size that has not been documented in the modern geophysical record. The event generated a broad range of atmospheric waves observed globally by various ground-based and spaceborne instrumentation networks. Most prominent is the surface-guided Lamb wave (Unknown node type: font<?XML:NAMESPACE PREFIX = “[default] http://www.w3.org/1998/Math/MathML” NS = “http://www.w3.org/1998/Math/MathML” />Unknown node type: font0.01 Hz), which we observed propagating for four (+three antipodal) passages around the Earth over six days. Based on Lamb wave amplitudes, the climactic Hunga explosion was comparable in size to that of the 1883 Krakatau eruption. The Hunga eruption produced remarkable globally-detected infrasound (0.01–20 Hz), long-range (~10,000 km) audible sound, and ionospheric perturbations. Seismometers worldwide recorded pure seismic and air-to-ground coupled waves. Air-to-sea coupling likely contributed to fast-arriving tsunamis. We highlight exceptional observations of the atmospheric waves.
