000007050 001__ 7050
000007050 005__ 20241106120533.0
000007050 0247_ $$2DOI$$a10.1126/science.adm9247
000007050 037__ $$aSCART-2024-0158
000007050 100__ $$aSvennevig, K.
000007050 245__ $$aA rockslide-generated tsunami in a Greenland fjord rang Earth for 9 days
000007050 260__ $$c2024
000007050 520__ $$aClimate change is increasingly predisposing polar regions to large landslides. Tsunamigenic landslides have occurred recently in Greenland (Kalaallit Nunaat), but none have been reported from the eastern fjords. In September 2023, we detected the start of a 9-day-long, global 10.88-millihertz (92-second) monochromatic very-long-period (VLP) seismic signal, originating from East Greenland. In this study, we demonstrate how this event started with a glacial thinning–induced rock-ice avalanche of 25 × 106 cubic meters plunging into Dickson Fjord, triggering a 200-meter-high tsunami. Simulations show that the tsunami stabilized into a 7-meter-high long-duration seiche with a frequency (11.45 millihertz) and slow amplitude decay that were nearly identical to the seismic signal. An oscillating, fjord-transverse single force with a maximum amplitude of 5 × 1011 newtons reproduced the seismic amplitudes and their radiation pattern relative to the fjord, demonstrating how a seiche directly caused the 9-day-long seismic signal. Our findings highlight how climate change is causing cascading, hazardous feedbacks between the cryosphere, hydrosphere, and lithosphere.
000007050 536__ $$aBRAIN/$$c2/$$f191/P1/GEOCAMB
000007050 594__ $$aNO
000007050 6531_ $$arockslide
000007050 6531_ $$alandslide
000007050 6531_ $$aseismology
000007050 6531_ $$atsunami
000007050 6531_ $$aseiche
000007050 6531_ $$apolar regions
000007050 700__ $$aHicks, S.P.
000007050 700__ $$aForbriger, T.
000007050 700__ $$aLecocq, T.
000007050 700__ $$aWidmer-Schnidrig, R.
000007050 700__ $$aMangeney, A.
000007050 700__ $$aHibert, C.
000007050 700__ $$aKorsgaard, N.J.
000007050 700__ $$aLucas, A.
000007050 700__ $$aSatriano, C.
000007050 700__ $$aAnthony, R.E.
000007050 700__ $$aMordret, A.
000007050 700__ $$aSchippkus, S.
000007050 700__ $$aRysgaard, S.
000007050 700__ $$aBoone, W.
000007050 700__ $$aGibbons, S.J.
000007050 700__ $$aCook, K.L.
000007050 700__ $$aGlimsdal, S.
000007050 700__ $$aLøvholt, F.
000007050 700__ $$aVan Noten, Koen
000007050 700__ $$aAssink, J.D.
000007050 700__ $$aMarboeuf, A.
000007050 700__ $$aLomax, A.
000007050 700__ $$aVanneste, K.
000007050 700__ $$aTaira, T.
000007050 700__ $$aSpagnolo, M.
000007050 700__ $$aDe Plaen, R.
000007050 700__ $$aKoelemeijer, P.
000007050 700__ $$aEbeling, C.
000007050 700__ $$aCannata, A.
000007050 700__ $$aHarcourt, W.D.
000007050 700__ $$aCornwell, D.G.
000007050 700__ $$aCaudron, C.
000007050 700__ $$aPoli, P.
000007050 700__ $$aBernard, P.
000007050 700__ $$aLarose, E.
000007050 700__ $$aStutzmann, E.
000007050 700__ $$aVoss, P.H.
000007050 700__ $$aLund, B.
000007050 700__ $$aCannavo, F.
000007050 700__ $$aCastro-Díaz, M.J.
000007050 700__ $$aChaves, E.
000007050 700__ $$aDahl-Jensen, T.
000007050 700__ $$aPinho Dias, N.D.
000007050 700__ $$aDéprez, A.
000007050 700__ $$aDevelter, R.
000007050 700__ $$aDreger, D.
000007050 700__ $$aEvers, L.G.
000007050 700__ $$aFernández-Nieto, E.D.
000007050 700__ $$aFerreira, A.M.G.
000007050 700__ $$aFunning, G.
000007050 700__ $$aGabriel, A.-A.
000007050 700__ $$aHendrickx, M.
000007050 700__ $$aKafka, A.L.
000007050 700__ $$aKeiding, M.
000007050 700__ $$aKerby, J.
000007050 700__ $$aKhan, S.A.
000007050 700__ $$aDideriksen, A.K.
000007050 700__ $$aLamb, O.D.
000007050 700__ $$aLarsen, T.B.
000007050 700__ $$aLipovsky, B.
000007050 700__ $$aMagdalena, I.
000007050 700__ $$aMalet, J.-P.
000007050 700__ $$aMyrup, M.
000007050 700__ $$aRivera, L.
000007050 700__ $$aRuiz-Castillo, E.
000007050 700__ $$aWetter, S.
000007050 700__ $$aWirtz, B.
000007050 773__ $$c1196–1205$$pScience$$v385$$y2024
000007050 8560_ $$fthomas.lecocq@ksb-orb.be
000007050 8564_ $$s16730489$$uhttps://publi2-as.oma.be/record/7050/files/MainManuscript_Dickson Fjord_copyeditcleaned.pdf
000007050 8564_ $$s4266$$uhttps://publi2-as.oma.be/record/7050/files/MainManuscript_Dickson Fjord_copyeditcleaned.jpg?subformat=icon-180$$xicon-180
000007050 8564_ $$s4862$$uhttps://publi2-as.oma.be/record/7050/files/MainManuscript_Dickson Fjord_copyeditcleaned.gif?subformat=icon$$xicon
000007050 8564_ $$s6039617$$uhttps://publi2-as.oma.be/record/7050/files/DicksonFjd4-LR1.gif$$yBefore & After view - The 25 million m³ rock mass fell into the fjord and generated a tsunami and a seiche that lasted for 9 days...
000007050 8564_ $$s1156793$$uhttps://publi2-as.oma.be/record/7050/files/DicksonFjd4-LR1.gif?subformat=icon$$xicon$$yBefore & After view - The 25 million m³ rock mass fell into the fjord and generated a tsunami and a seiche that lasted for 9 days...
000007050 85642 $$ahttps://doi.org/10.1126/science.adm9247
000007050 85642 $$ahttps://youtu.be/60T9TKuuujs
000007050 905__ $$apublished in
000007050 980__ $$aREFERD