eprintid: 10196971 rev_number: 9 eprint_status: archive userid: 699 dir: disk0/10/19/69/71 datestamp: 2024-09-16 10:36:37 lastmod: 2024-09-16 10:36:37 status_changed: 2024-09-16 10:36:37 type: article metadata_visibility: show sword_depositor: 699 creators_name: Svennevig, Kristian creators_name: Hicks, Stephen P creators_name: Forbriger, Thomas creators_name: Lecocq, Thomas creators_name: Widmer-Schnidrig, Rudolf creators_name: Mangeney, Anne creators_name: Hibert, Clément creators_name: Korsgaard, Niels J creators_name: Lucas, Antoine creators_name: Satriano, Claudio creators_name: Anthony, Robert E creators_name: Mordret, Aurélien creators_name: Schippkus, Sven creators_name: Rysgaard, Søren creators_name: Boone, Wieter creators_name: Gibbons, Steven J creators_name: Cook, Kristen L creators_name: Glimsdal, Sylfest creators_name: Løvholt, Finn creators_name: Van Noten, Koen creators_name: Assink, Jelle D creators_name: Marboeuf, Alexis creators_name: Lomax, Anthony creators_name: Vanneste, Kris creators_name: Taira, Taka’aki creators_name: Spagnolo, Matteo creators_name: De Plaen, Raphael creators_name: Koelemeijer, Paula creators_name: Ebeling, Carl creators_name: Cannata, Andrea creators_name: Harcourt, William D creators_name: Cornwell, David G creators_name: Caudron, Corentin creators_name: Poli, Piero creators_name: Bernard, Pascal creators_name: Larose, Eric creators_name: Stutzmann, Eleonore creators_name: Voss, Peter H creators_name: Lund, Bjorn creators_name: Cannavo, Flavio creators_name: Castro-Díaz, Manuel J creators_name: Chaves, Esteban creators_name: Dahl-Jensen, Trine creators_name: Pinho Dias, Nicolas De creators_name: Déprez, Aline creators_name: Develter, Roeland creators_name: Dreger, Douglas creators_name: Evers, Läslo G creators_name: Fernández-Nieto, Enrique D creators_name: Ferreira, Ana MG creators_name: Funning, Gareth creators_name: Gabriel, Alice-Agnes creators_name: Hendrickx, Marc creators_name: Kafka, Alan L creators_name: Keiding, Marie creators_name: Kerby, Jeffrey creators_name: Khan, Shfaqat A creators_name: Dideriksen, Andreas Kjær creators_name: Lamb, Oliver D creators_name: Larsen, Tine B creators_name: Lipovsky, Bradley creators_name: Magdalena, Ikha creators_name: Malet, Jean-Philippe creators_name: Myrup, Mikkel creators_name: Rivera, Luis creators_name: Ruiz-Castillo, Eugenio creators_name: Wetter, Selina creators_name: Wirtz, Bastien title: A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days ispublished: pub divisions: UCL divisions: B04 divisions: C06 divisions: F57 note: This version is the author-accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: Climate change is increasingly predisposing polar regions to large landslides. Tsunamigenic landslides have occurred recently in Greenland (Kalaallit Nunaat), but none have been reported from the eastern fjords. In September 2023, we detected the start of a 9-day-long, global 10.88-millihertz (92-second) monochromatic very-long-period (VLP) seismic signal, originating from East Greenland. In this study, we demonstrate how this event started with a glacial thinning–induced rock-ice avalanche of 25 × 106 cubic meters plunging into Dickson Fjord, triggering a 200-meter-high tsunami. Simulations show that the tsunami stabilized into a 7-meter-high long-duration seiche with a frequency (11.45 millihertz) and slow amplitude decay that were nearly identical to the seismic signal. An oscillating, fjord-transverse single force with a maximum amplitude of 5 × 1011 newtons reproduced the seismic amplitudes and their radiation pattern relative to the fjord, demonstrating how a seiche directly caused the 9-day-long seismic signal. Our findings highlight how climate change is causing cascading, hazardous feedbacks between the cryosphere, hydrosphere, and lithosphere. date: 2024-09-13 date_type: published publisher: American Association for the Advancement of Science (AAAS) official_url: https://doi.org/10.1126/science.adm9247 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 2312242 doi: 10.1126/science.adm9247 lyricists_name: Hicks, Stephen lyricists_id: SHICK07 actors_name: Hicks, Stephen actors_id: SHICK07 actors_role: owner full_text_status: public publication: Science volume: 385 number: 6714 pagerange: 1196-1205 issn: 0036-8075 citation: Svennevig, Kristian; Hicks, Stephen P; Forbriger, Thomas; Lecocq, Thomas; Widmer-Schnidrig, Rudolf; Mangeney, Anne; Hibert, Clément; ... Wirtz, Bastien; + view all <#> Svennevig, Kristian; Hicks, Stephen P; Forbriger, Thomas; Lecocq, Thomas; Widmer-Schnidrig, Rudolf; Mangeney, Anne; Hibert, Clément; Korsgaard, Niels J; Lucas, Antoine; Satriano, Claudio; Anthony, Robert E; Mordret, Aurélien; Schippkus, Sven; Rysgaard, Søren; Boone, Wieter; Gibbons, Steven J; Cook, Kristen L; Glimsdal, Sylfest; Løvholt, Finn; Van Noten, Koen; Assink, Jelle D; Marboeuf, Alexis; Lomax, Anthony; Vanneste, Kris; Taira, Taka’aki; Spagnolo, Matteo; De Plaen, Raphael; Koelemeijer, Paula; Ebeling, Carl; Cannata, Andrea; Harcourt, William D; Cornwell, David G; Caudron, Corentin; Poli, Piero; Bernard, Pascal; Larose, Eric; Stutzmann, Eleonore; Voss, Peter H; Lund, Bjorn; Cannavo, Flavio; Castro-Díaz, Manuel J; Chaves, Esteban; Dahl-Jensen, Trine; Pinho Dias, Nicolas De; Déprez, Aline; Develter, Roeland; Dreger, Douglas; Evers, Läslo G; Fernández-Nieto, Enrique D; Ferreira, Ana MG; Funning, Gareth; Gabriel, Alice-Agnes; Hendrickx, Marc; Kafka, Alan L; Keiding, Marie; Kerby, Jeffrey; Khan, Shfaqat A; Dideriksen, Andreas Kjær; Lamb, Oliver D; Larsen, Tine B; Lipovsky, Bradley; Magdalena, Ikha; Malet, Jean-Philippe; Myrup, Mikkel; Rivera, Luis; Ruiz-Castillo, Eugenio; Wetter, Selina; Wirtz, Bastien; - view fewer <#> (2024) A rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days. Science , 385 (6714) pp. 1196-1205. 10.1126/science.adm9247 <https://doi.org/10.1126/science.adm9247>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10196971/1/MainManuscript_Dickson%20Fjord_copyeditcleaned.pdf