The Hunga Tonga-Hunga/Hunga-Ha'apai eruption on January 15, 2022 sent off a plume of ash material up to the stratosphere and triggered a meteotsunami and barometric pressure pulse that rippled through the atmosphere and oceans all around the world. The nature of the volcanic event and its global impacts on the oceans, atmosphere, lithosphere and the cryosphere are a matter of debate. Here we present a first overview of the time travel of the sound atmospheric pressure wave through the Antarctic continent based on in situ measurements, which represented a unique event observed through the polar ice sheet during the instrumental meteorological era. In addition, we estimated the tsunami travel time of the Hunga-Tonga event from a first order model to infer its impact over the Antarctic Sea ice and ice shelves. One outcome from our observations and modeling is the detection of the meteotsunami in the Antarctic Peninsula and the impact of the continental relief over the atmospheric pressure wave dispersion.

Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research Bremerhaven Am Handelshafen 12 27570 Bremerhaven Germany

ENEA Italian National Agency for New Technologies Energy and Sustainable Economic Development Laboratory for Observations and Measurements for Environment and Climate Via Anguillarese 301 00123 Rome Italy

Instituto Antártico Chileno Ministerio de Relaciones Exteriores Plaza Muñoz Gamero 1055 Punta Arenas Chile

Instituto Nacional de Meteorologia INMET Alameda Campinas 433 Jardim Paulista 01404 901 São Paulo SP Brazil

National Institute for Space Research INPE Av dos Astronautas 1758 Jardim da Granja 12227 010 São José dos Campos SP Brazil

National Institute for Space Research INPE Laboratory of Ocean and Atmosphere Studies LOA Earth Observation and Geoinformatics Division OBT Av dos Astronautas 1758 12227 010 São Jose dos Campos SP Brazil

Rio de Janeiro State University Centro de Pesquisa e Estudos sobre Desastres CEPEDES FGEL Rua São Francisco Xavier 524 Maracanã 20550 013 Rio de Janeiro RJ Brazil

Rio de Janeiro State University LARAMG Pavilhão Haroldo L Cunha Subsolo Rua São Francisco Xavier 524 Maracanã 20550 013 Rio de Janeiro RJ Brazil

Rio de Janeiro State University UERJ Faculty of Geography IGEOG LAGEPRO Rua São Francisco Xavier 524 Maracanã 20550 013 Rio de Janeiro RJ Brazil

University of Life Sciences Prague Kamýcká 129 165 00 Praha Suchdol Czech Republic

University of Tasmania AAD and AAPP Private Bag 80 Hobart Tasmania 7001 Australia

University of Wisconsin Madison Antarctic Meteorological Research and Data Center Space Science and Engineering Center Madison WI 53706 USA

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