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Solid Earth–atmosphere interaction forces during the 15 January 2022 Tonga eruption

Garza-Girón, Ricardo and Lay, Thorne and Pollitz, Frederick and Kanamori, Hiroo and Rivera, Luis (2023) Solid Earth–atmosphere interaction forces during the 15 January 2022 Tonga eruption. Science Advances, 9 (2). Art. No. add4931. ISSN 2375-2548. PMCID PMC9833673. doi:10.1126/sciadv.add4931.

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Rapid venting of volcanic material during the 15 January 2022 Tonga eruption generated impulsive downward reaction forces on the Earth of ~2.0 × 10¹³ N that radiated seismic waves observed throughout the planet, with ~25 s source bursts persisting for ~4.5 hours. The force time history is determined by analysis of teleseismic P waves and Rayleigh waves with periods approximately <50 s, providing insight into the overall volcanic eruption process. The atmospheric acoustic-gravity Lamb wave expanding from the eruption produced broadband ground motions when transiting land, along with driven and conventional tsunami waves. Atmospheric standing acoustic waves near the source produced oscillatory peak forces as large as 4 × 10¹² N, exciting resonant solid Earth Rayleigh wave motions at frequencies of 3.7 and 4.6 mHz.

Item Type:Article
Related URLs:
URLURL TypeDescription CentralArticle
Garza-Girón, Ricardo0000-0001-9775-9635
Lay, Thorne0000-0003-2360-4213
Pollitz, Frederick0000-0002-4060-2706
Kanamori, Hiroo0000-0001-8219-9428
Rivera, Luis0000-0002-0726-5445
Additional Information:We thank participants of the UCSC Seismology Laboratory coffee hours for discussion of this analysis. Helpful comments on the manuscript were provided by E. Cochran, S. Prejean, and an anonymous reviewer. We thank the facilities of Incorporated Research Institutions for Seismology (IRIS) Data Services and specifically the IRIS Data Management Center, which were used for access to waveforms, and Green’s functions used in this study. IRIS Data Services are funded through the Seismological Facility for the Advancement of Geoscience (SAGE) Award of the National Science Foundation under Cooperative Support Agreement EAR-1851048. This work is supported by National Science Foundation grant EAR-1802364 (T.L.).
Group:Division of Geological and Planetary Sciences, Seismological Laboratory
Funding AgencyGrant Number
Issue or Number:2
PubMed Central ID:PMC9833673
Record Number:CaltechAUTHORS:20230125-514504700.11
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:118933
Deposited By: Research Services Depository
Deposited On:30 Jan 2023 18:29
Last Modified:30 Jan 2023 18:29

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