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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Megatsunami | 10/10 | https://en.wikipedia.org/wiki/Megatsunami | reference | science, encyclopedia | 2026-05-05T07:35:36.838495+00:00 | kb-cron |
=== Norway === Although known earlier to the local population, a crack 2 metres (6.6 ft) wide and 500 metres (1,640 ft) in length in the side of the mountain Åkerneset in Norway was rediscovered in 1983 and attracted scientific attention. Located at (62°10'52.28"N, 6°59'35.38"E), it since has widened at a rate of 4 centimetres (1.6 in) per year. Geological analysis has revealed that a slab of rock 62 metres (203 ft) thick and at an elevation stretching from 150 to 900 metres (492 to 2,953 ft) is in motion. Geologists assess that an eventual catastrophic collapse of 18,000,000 to 54,000,000 cubic metres (24,000,000 to 71,000,000 cu yd) of rock into Sunnylvsfjorden is inevitable and could generate megatsunamis of 35 to 100 metres (115 to 328 ft) in height on the fjord′s opposite shore. The waves are expected to strike Hellesylt with a height of 35 to 85 metres (115 to 279 ft), Geiranger with a height of 30 to 70 metres (98 to 230 ft), Tafjord with a height of 14 metres (46 ft), and many other communities in Norway's Sunnmøre district with a height of several metres, and to be noticeable even at Ålesund. The predicted disaster is depicted in the 2015 Norwegian film The Wave.
== See also == 2004 Indian Ocean earthquake and tsunami List of tsunamis Teletsunami Tsunamis in lakes Volcanic tsunami
== References ==
=== Footnotes ===
=== Bibliography === Day, S.J.; Carracedo, J.C.; Guillou, H.; Gravestock, P. (1999). "Recent structural evolution of the Cumbre Vieja volcano, La Palma, Canary Islands: volcanic rift zone re-configuration as a precursor to flank instability" (PDF). J. Volcanol. Geotherm. Res. 94 (1–4): 135–167. Bibcode:1999JVGR...94..135D. CiteSeerX 10.1.1.544.8128. doi:10.1016/S0377-0273(99)00101-8. Lander, James F. Tsunamis Affecting Alaska 1737–1996. Boulder, Colorado: NOAA National Geophysical Data Center, September 1996. Pararas-Carayannis, G. (2002). "Evaluation of the Threat of Mega Tsunami Generation from Postulated Massive Slope Failure of Island Stratovolcanoes on La Palma, Canary Islands, and on The Island of Hawaii, George" (PDF). Science of Tsunami Hazards. 20 (5): 251–277. Voight, B.; Janda, R.; Glicken, H.; Douglass, P.M. (1983). "Nature and mechanics of the Mount St Helens rockslide-avalanche of 18 May 190". Géotechnique. 33 (10): 243–273. Bibcode:1983Getq...33..243V. doi:10.1680/geot.1983.33.3.243. Ward, S.N.; Day, S. (2001). "Cumbre Vieja Volcano – Potential collapse and tsunami at La Palma, Canary Islands" (PDF). Geophysical Research Letters. 28 (17): 3397–3400. Bibcode:2001GeoRL..28.3397W. doi:10.1029/2001GL013110.
== Further reading == Bonelli Rubio, J.M. (1950). Contribucion al estudio de la erupcion del Nambroque o San Juan. Madrid: Inst. Geografico y Catastral. BBC 2 TV; 2000. Transcript "Mega-tsunami; Wave of Destruction", Horizon. First screened 21.30 hrs, Thursday, 12 October 2000. Carracedo, J.C. (1994). "The Canary Islands: an example of structural control on the growth of large oceanic-island volcanoes". J. Volcanol. Geotherm. Res. 60 (3–4): 225–241. Bibcode:1994JVGR...60..225C. doi:10.1016/0377-0273(94)90053-1. Carracedo, J.C. (1996). "A simple model for the genesis of large gravitational landslide hazards in the Canary Islands". In McGuire, W; Jones; Neuberg, J.P. (eds.). Volcano Instability on the Earth and Other Planets. Special Publication. Vol. 110. London: Geological Society. pp. 125–135. Carracedo, J.C. (1999). "Growth, Structure, Instability and Collapse of Canarian Volcanoes and Comparisons with Hawaiian Volcanoes". J. Volcanol. Geotherm. Res. 94 (1–4): 1–19. Bibcode:1999JVGR...94....1C. doi:10.1016/S0377-0273(99)00095-5. Moore, J.G. (1964). Giant Submarine Landslides on the Hawaiian Ridge. US Geologic Survey. pp. D95–8. Professional Paper 501-D. Pinter, N.; Ishman, S.E. (2008). "Impacts, mega-tsunami, and other extraordinary claims". GSA Today. 18 (1): 37–38. Bibcode:2008GSAT...18a..37P. doi:10.1130/GSAT01801GW.1. Rihm, R; Krastel, S. & CD109 Shipboard Scientific Party; 1998. "Volcanoes and landslides in the Canaries". National Environment Research Council News. Summer, 16–17. Siebert, L. (1984). "Large volcanic debris avalanches: characteristics of source areas, deposits and associated eruptions". J. Volcanol. Geotherm. Res. 22 (3–4): 163–197. Bibcode:1984JVGR...22..163S. doi:10.1016/0377-0273(84)90002-7. Vallely, G.A. (2005). "Volcanic edifice instability and tsunami generation: Montaña Teide, Tenerife, Canary Islands (Spain)". Journal of the Open University Geological Society. 26 (1): 53–64. Sandom, J.G., 2010, The Wave – A John Decker Thriller, Cornucopia Press, 2010. A thriller in which a megatsunami is intentionally created when a terrorist detonates a nuclear bomb on La Palma in the Canary Islands. Ortiz, J.R., Bonelli Rubio, J.M., 1951. La erupción del Nambroque (junio-agosto de 1949). Madrid: Talleres del Instituto Geográfico y Catastral, 100 p., 1h. pleg.;23 cm
== External links ==
Mega Tsunami: history, causes, effects World's Biggest Tsunami: The largest recorded tsunami with a wave 1720 feet tall in Lituya Bay, Alaska. Benfield Hazard Research Centre BBC – Mega-tsunami: Wave of Destruction BBC Two program broadcast 12 October 2000 La Palma threat "over-hyped" Archived 24 March 2017 at the Wayback Machine, BBC News, 29 October 2004 Mega-hyped Tsunami story A detailed of analysis demolishing the La Palma Tsunami speculation.