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{{short description|A very large wave created by a large, sudden displacement of material into a body of water}}File:Lituya Bay megatsunami diagram (English).png|thumb|right|250px|Diagram of the 1958 Lituya Bay megatsunami1958 Lituya Bay megatsunamiA megatsunami is a very large wave created by a large, sudden displacement of material into a body of water.Megatsunamis have quite different features from other, more usual types of tsunamis. Most tsunamis are caused by underwater tectonic activity (movement of the earth's plates) and therefore occur along plate boundaries and as a result of earthquake and rise or fall in the sea floor, causing water to be displaced. Ordinary tsunamis have shallow waves out at sea, and the water piles up to a wave height of up to about 10 metres (33 feet) as the sea floor becomes shallow near land. By contrast, megatsunamis occur when a very large amount of material suddenly falls into water or anywhere near water (such as via a meteor impact), or are caused by volcanic activity. They can have extremely high initial wave heights of hundreds and possibly thousands of metres, far beyond any ordinary tsunami, as the water is "splashed" upwards and outwards by the impact or displacement. As a result, two heights are sometimes quoted for megatsunamis – the height of the wave itself (in water), and the height to which it surges when it reaches land, which depending upon the locale, can be several times larger.Modern megatsunamis include the one associated with the 1883 eruption of Krakatoa (volcanic eruption), the 1958 Lituya Bay megatsunami (landslide into a bay), and the wave resulting from the Vajont Dam landslide (caused by human activity destabilizing sides of valley). Prehistoric examples include the Storegga Slide (landslide), and the Chicxulub, Chesapeake Bay and Eltanin meteor impacts.


{{Unsourced section|date=September 2018}}A megatsunami is a tsunami—a large wave due to displacement of a body of water—with an initial wave amplitude (height) measured in several tens, hundreds, or possibly thousands of metres.Normal tsunamis generated at sea result from movement of the sea floor. They have a small wave height offshore, are very long (often hundreds of kilometres), and generally pass unnoticed at sea, forming only a slight swell usually of the order of {{convert|30|cm|abbr=on}} above the normal sea surface. When they reach land, the wave height increases dramatically as the base of the wave pushes the water column above it upwards.By contrast, megatsunamis are caused by giant landslides and other impact events. This could also refer to a meteorite hitting an ocean. Underwater earthquakes or volcanic eruptions do not normally generate such large tsunamis, but landslides next to bodies of water resulting from earthquakes can, since they cause a large amount of displacement. If the landslide or impact occurs in a limited body of water, as happened at the Vajont Dam (1963) and Lituya Bay (1958) then the water may be unable to disperse and one or more exceedingly large waves may result.A way to visualize the difference, is that an ordinary tsunami is caused by sea floor changes, somewhat like pushing up on the floor of a large tub of water to the point it overflows, and causing a surge of water to "run off" at the sides. In this analogy, a megatsunami would be more similar to dropping a large rock from a considerable height into the tub, at one end, causing water to splash up and out, and overflow at the other end.Two heights are sometimes quoted for megatsunamis – the height of the wave itself (in water), and the height to which it surges when it reaches land, which depending upon the locale, can be several times larger.

Recognition of the concept of megatsunami

Geologists searching for oil in Alaska in 1953 observed that in Lituya Bay, mature tree growth did not extend to the shoreline as it did in many other bays in the region. Rather, there was a band of younger trees closer to the shore. Forestry workers, glaciologists, and geographers call the boundary between these bands a trim line. Trees just above the trim line showed severe scarring on their seaward side, whilst those from below the trim line did not. The scientists hypothesized that there had been an unusually large wave or waves in the deep inlet. Because this is a recently deglaciated fjord with steep slopes and crossed by a major fault, one possibility was a landslide-generated tsunami.On 9 July 1958, a 7.8 {{M|w}} strike-slip earthquake in southeast Alaska caused 90 million tonnes of rock and ice to drop into the deep water at the head of Lituya Bay. The block fell almost vertically and hit the water with sufficient force to create a wave that surged up the opposite side of the head of the bay to a height of 1720 feet (524 m), and was still many tens of metres high further down the bay, when it carried eyewitnesses Howard Ulrich and his son Howard Jr. over the trees in their fishing boat. They were washed back into the bay and both survived.

Analysis of mechanism

The mechanism giving rise to megatsunamis was analysed for the Lituya Bay event in a study presented at the Tsunami Society in 1999;The Mega-Tsunami of July 9, 1958 in Lituya Bay, Alaska: Analysis of Mechanism – George Pararas-Carayannis, Excerpts from Presentation at the Tsunami Symposium of Tsunami Society of May 25–27, 1999, in Honolulu, Hawaii, USA this model was considerably developed and modified by a second study in 2010.Although the earthquake which caused the megatsunami was considered very energetic, and involving strong ground movements, several possible mechanisms were not likely or able to have caused the resulting megatsunami. Neither water drainage from a lake, nor landslide, nor the force of the earthquake itself led to the megatsunami, although all of these may have contributed.Instead, the megatsunami was caused by a massive and sudden impulsive impact when about 40 million cubic yards of rock several hundred metres above the bay was fractured from the side of the bay, by the earthquake, and fell "practically as a monolithic unit" down the almost vertical slope and into the bay. The rockfall also caused air to be "dragged along" due to viscosity effects, which added to the volume of displacement, and further impacted the sediment on the floor of the bay, creating a large crater. The study concluded that:A 2010 model examined the amount of infill on the floor of the bay, which was many times larger than that of the rockfall alone, and also the energy and height of the waves, and the accounts given by eyewitnesses, concluded that there had been a "dual slide" involving a rockfall, which also triggered a release of 5 to 10 times its volume of sediment trapped by the adjacent Lituya Glacier, as an almost immediate and many times larger second slide, a ratio comparable with other events where this "dual slide" effect is known to have happened.JOURNAL, Ward, Steven N., Day, Simon, 2010, Lituya Bay Landslide and Tsunami — A Tsunami Ball Approach,weblink Journal of Earthquake and Tsunami, 4, 4, 285–319, 10.1142/S1793431110000893,

List of megatsunamis


  • The asteroid linked to the extinction of dinosaurs, which created the Chicxulub crater in Yucatán approximately 66 million years ago, would have caused an over {{convert|100|m}} tall megatsunami. The height of the tsunami was limited due to relatively shallow sea in the area of the impact; in deep sea it would be {{convert|4.6|km}} tall.BOOK,weblink Tsunami: The Underrated Hazard, Edward, Bryant, June 2014, Springer, 978-3-319-06133-7, 178, . A more recent simulation of the global effects of the megatsunami showed initial wave height of {{convert|1.5|km}}, with later waves up to {{convert|100|m}} height in the Gulf of Mexico, and up to {{convert|14|m}} in the North Atlantic and South Pacific.WEB,weblink Dinosaur-Killing Asteroid Created A Mile-High Tsunami That Swept Through The World's Oceans,, January 8, 2019,
  • A series of megatsunamis were generated by the bolide impact that created the Chesapeake Bay impact crater, about 35.5 million years ago.JOURNAL, 10.1016/S0037-0738(96)00048-6, Poag, C. W., 1997, The Chesapeake Bay bolide impact: A convulsive event in Atlantic Coastal Plain evolution, Sedimentary Geology (journal), Sedimentary Geology, 108, 1–4, 45–90, 1997SedG..108...45P, harv,
  • During the Messinian the coasts of northern Chile were likely struck by various megatsunamis.JOURNAL, Le Roux, Jacobus P., 2015, A critical examination of evidence used to re-interpret the Hornitos mega-breccia as a mass-flow deposit caused by cliff failure,weblink Andean Geology, 41, 1, 139–145,
  • A megatsunami affected the coast of south–central Chile in the Pliocene as evidenced by the sedimentary record of Ranquil Formation.JOURNAL, Le Roux, J.P., Nielsen, Sven N., Kemnitz, Helga, Henriquez, Álvaro, 2008, A Pliocene mega-tsunami deposit and associated features in the Ranquil Formation, southern Chile,weblink Sedimentary Geology (journal), Sedimentary Geology, 203, 1, 164–180, 10.1016/j.sedgeo.2007.12.002, 11 April 2016, 2008SedG..203..164L,
  • The Eltanin impact in the southeast Pacific Ocean 2.5 million years ago caused a megatsunami that was over 200 m (660 ft) high in southern Chile and the Antarctic Peninsula; the wave swept across much of the Pacific Ocean.
  • The northern half of the East Molokai Volcano suffered a catastrophic collapse and likely megatsunami about 1.5 million years ago and now lies as a debris field scattered northward across the ocean bottom,WEB,weblink Hawaiian landslides have been catastrophic,, Monterey Bay Aquarium Research Institute, 2015-10-22, while what remains on the island are the highest sea cliffs in the world.Culliney, John L. (2006) Islands in a Far Sea: The Fate of Nature in Hawaii. Honolulu: University of Hawaii Press. p. 17.
  • The existence of large scattered boulders in only one of the four marine terraces of Herradura Bay south of the Chilean city of Coquimbo has been interpreted by Roland Paskoff as the result of a mega-tsunami that occurred in the Middle Pleistocene.JOURNAL, Paskoff, Roland, Roland Paskoff, 1991, Likely occurrence of mega-tsunami in the Middle Pleistocene near Coquimbo, Chile,weblink Andean Geology, Revista geológica de Chile, 18, 1, 87–91, 17 July 2016,
  • A massive collapse of the western edge of the Lake Tahoe basin, which formed McKinney Bay around 50,000 years ago, is thought to have generated a tsunami/seiche wave with a height approaching {{convert|330|ft|abbr=on}}.CONFERENCE, Gardner, J.V., The Lake Tahoe debris avalanche, Geological Society of Australia, 15th Annual Geological Conference, July 2000,
  • In the North Sea, the Storegga Slide caused a megatsunami approximately 8,200 years ago.JOURNAL, 10.1016/j.marpetgeo.2004.10.003, Bondevik, S., F., Lovholt, C., Harbitz, J., Mangerud, A., Dawsond, J. I., Svendsen, 2005, The Storegga Slide tsunami—comparing field observations with numerical simulations, Marine and Petroleum Geology, 22, 1–2, 195–208, harv, It is estimated to have completely flooded the remainder of Doggerland.NEWS,weblink Prehistoric North Sea 'Atlantis' hit by 5m tsunami, Paul, Rincon, 1 May 2014, 22 February 2017,, BBC News,
  • Approximately 8,000 years ago, a massive volcanic landslide off Mt. Etna, Sicily caused a megatsunami which devastated the eastern Mediterranean coastline on three continents. Wave heights on the coast of Calabria are estimated to have reached a maximum of 40m.JOURNAL, 10.1029/2006GL027790, Pareschi, M. T., Boschi, E., Favalli, M., 2006, Lost tsunami, Geophysical Research Letters, 33, 22, L22608, 2006GeoRL..3322608P, harv,


c. 2000 BC: Réunion

c. 1600 BC: Santorini


1792: Mount Unzen, Japan

In 1792, Mount Unzen in Japan erupted, causing part of the volcano to collapse into the sea. The landslide caused a megatsunami that reached {{convert|100|m|ft}} high and killed 15,000 people in the local fishing villages.{{Citation needed|date=June 2011}}

1883: Krakatoa

The eruption of Krakatoa created pyroclastic flows which generated megatsunamis when they hit the waters of the Sunda Strait on 27 August 1883. The waves reached heights of up to 24 metres (79 feet) along the south coast of Sumatra and up to 42 metres (138 feet) along the west coast of Java.Bryant, Edward, Tsunami: The Underrated Hazard, Springer: New York, 2014, {{ISBN|978-3-319-06132-0}}, pp. 162–163.

1958: Lituya Bay, Alaska, US

File:Lituya-Bay-overview-with-arrows.png|thumb|Damage from the 1958 Lituya Bay megatsunami can be seen in this oblique aerial photograph of Lituya BayLituya BayOn July 9, 1958, a giant landslide at the head of Lituya Bay in Alaska, caused by an earthquake, generated a wave that washed out trees to a maximum altitude of {{convert|520|m|ft}} at the entrance of Gilbert Inlet.JOURNAL,weblink Modeling the 1958 Lituya Bay Mega-Tsunami, II, Mader, Charles L., Gittings, Michael L., Science of Tsunami Hazards, 2002, 20, 5, 241–250, The wave surged over the headland, stripping trees and soil down to bedrock, and surged along the fjord which forms Lituya Bay, destroying a fishing boat anchored there and killing two people.WEB,weblink Don J., Miller, 3, Giant Waves in Lituya Bay, Alaska,,weblink" title="">weblink 13 October 2013,

1963: Vajont Dam, Italy

On October 9, 1963, a landslide above Vajont Dam in Italy produced a {{convert|250|m|ft|abbr=on}} surge that overtopped the dam and destroyed the villages of Longarone, Pirago, Rivalta, Villanova and Faè, killing nearly 2,000 people.WEB,weblink Archived copy, 2009-07-29, yes,weblink" title="">weblink 2009-07-29, Vaiont Dam photos and virtual field trip (University of Wisconsin), retrieved 2009-07-01

1980: Spirit Lake, Washington, US

On May 18, 1980, the upper 460 metres (1,509 feet) of Mount St. Helens collapsed, creating a massive landslide. This released the pressure on the magma trapped beneath the summit bulge which exploded as a lateral blast, which then released the pressure on the magma chamber and resulted in a plinian eruption.One lobe of the avalanche surged onto Spirit Lake, causing a megatsunami which pushed the lake waters in a series of surges, which reached a maximum height of 260 metres (853 feet){{harvnb|Voight|Jandra|Glicken|Douglass|1983}} above the pre-eruption water level (~975 m asl/3,199 ft). Above the upper limit of the tsunami, trees lie where they were knocked down by the pyroclastic surge; below the limit, the fallen trees and the surge deposits were removed by the megatsunami and deposited in Spirit Lake.USGS] Website]. Geology of Interactions of Volcanoes, Snow, and Water: Tsunami on Spirit Lake early during 18 May 1980 eruption

Potential future megatsunamis

In a BBC television documentary broadcast in 2000, experts said that they thought that a massive landslide on a volcanic ocean island is the most likely future cause of a megatsunami.Mega-tsunami: Wave of Destruction. Transcript. BBC Two television programme, first broadcast 12 October 2000 The size and power of a wave generated by such means could produce devastating effects, travelling across oceans and inundating up to {{convert|25|km|0}} inland from the coast. This research, however, was later found to be flawed. The documentary was produced before the experts' scientific paper was published and before responses were given by other geologists. There have been megatsunamis in the past, and future megatsunamis are possible but current geological consensus is that these are only local. A megatsunami in the Canary Islands would diminish to a normal tsunami by the time it reached the continents. Also, the current consensus for La Palma is that the region conjectured to collapse is too small and too geologically stable to do so in the next 10,000 years, although there is evidence for past megatsunamis local to the Canary Isles thousands of years ago. Similar remarks apply to the suggestion of a megatsunami in Hawaii.

British Columbia

Some geologists consider an unstable rock face at Mount Breakenridge, above the north end of the giant fresh-water fjord of Harrison Lake in the Fraser Valley of southwestern British Columbia, Canada, to be unstable enough to collapse into the lake, generating a megatsunami that might destroy the town of Harrison Hot Springs (located at its south end).WEB,weblink Landslides in the Vancouver-Fraser Valley-Whistler region, Evans, S.G., Savigny, K.W., 1994, Geological Survey of Canada, Ministry of Forests, Province of British Columbia, 36 p, 2008-12-28,

Canary Islands

Geologists Dr. Simon Day and Dr. Steven Neal Ward consider that a megatsunami could be generated during an eruption of Cumbre Vieja on the volcanic ocean island of La Palma, in the Canary Islands, Spain.{{harvnb|Day|Carracedo|Guillou|Gravestock|1999}}{{harvnb|Ward|Day|2001}}In 1949, this volcano erupted at its Duraznero, Hoyo Negro and Llano del Banco vents, and there was an earthquake with an epicentre near the village of Jedey. The next day Juan Bonelli Rubio, a local geologist, visited the summit area and found that a fissure about {{convert|2.5|km|mi}} long had opened on the east side of the summit. As a result, the west half of the volcano (which is the volcanically active arm of a triple-armed rift) had slipped about {{convert|2|m|ft}} downwards and {{convert|1|m|ft}} westwards towards the Atlantic Ocean.{{harvnb|Bonelli|1950}}Cumbre Vieja is currently dormant, but will almost certainly erupt again. Day and Ward hypothesize that if such an eruption causes the western flank to fail, a mega-tsunami could be generated.La Palma is currently the most volcanically active island in the Canary Islands Archipelago. It is likely that several eruptions would be required before failure would occur on Cumbre Vieja. However, the western half of the volcano has an approximate volume of {{convert|500|km3|cumi}} and an estimated mass of {{convert|1.5|e12MT|ST}}. If it were to catastrophically slide into the ocean, it could generate a wave with an initial height of about {{convert|1000|m}} at the island, and a likely height of around {{convert|50|m|0}} at the Caribbean and the Eastern North American seaboard when it runs ashore eight or more hours later. Tens of millions of lives could be lost in the cities and/or towns of St. John's, Halifax, Boston, New York, Baltimore, Washington, D.C., Miami, Havana and the rest of the Eastern Coasts of the United States and Canada, as well as many other cities on the Atlantic coast in Europe, South America and Africa. The likelihood of this happening is a matter of vigorous debate.{{harvnb|Pararas-Carayannis|2002}}The last eruption on the Cumbre Vieja occurred in 1971 at the Teneguia vent at the southern end of the sub-aerial section without any movement. The section affected by the 1949 eruption is currently stationary and does not appear to have moved since the initial rupture.As per Bonelli RubioGeologists and volcanologists are in general agreement that the initial study was flawed. The current geology does not suggest that a collapse is imminent. Indeed, it seems to be geologically impossible right now, the region conjectured as prone to collapse is too small and too stable to collapse within the next 10,000 years.New Research Puts 'Killer La Palma Tsunami' At Distant Future, Science Daily, September 21, 2006, based on materials from the Delft University of Technology They also concluded that a landslide is likely to happen as a series of smaller collapses rather than a single landslide from closer study of deposits left in the ocean by previous landslides. A megatsunami does seem possible locally in the distant future as there is geological evidence from past deposits suggesting that a megatsunami occurred with marine material deposited 41 to 188 meters above sea level between 32,000 and 1.75 million years ago.Pérez-Torrado, F. J; Paris, R; Cabrera, M. C; Schneider, J-L; Wassmer, P; Carracedo, J. C; Rodríguez-Santana, A; & Santana, F; 2006. Tsunami deposits related to flank collapse in oceanic volcanoes: The Agaete Valley evidence, Gran Canaria, Canary Islands. Marine Geol. 227, 135–149 This seems to have been local to Gran Canaria.Day and Ward have admitted that their original analysis of the danger was based on several worst case assumptions.WEB,weblink Tidal wave threat 'over-hyped', BBC NEWS, Ali Ayres, 2004-10-29, JOURNAL, Science of Tsunami Hazards, 20, 5, 251–277,weblink 7 September 2014, Evaluation of the threat of mega tsunami generation from postulated massive slope failures of the island volcanoes on La Palma, Canary Islands, and on the island of Hawaii, George, Pararas-Carayannis, 2002, A 2008 paper looked into this very worst-case scenario, the most massive slide that could happen (though unlikely and probably impossible right now with the present day geology). Although it would be a megatsunami locally in the Canary Isles, it would diminish in height to a regular tsunami when it reaches the continents as the waves interfere and spread across the oceans.Løvholt, F., G. Pedersen, and G. Gisler. "Oceanic propagation of a potential tsunami from the La Palma Island." Journal of Geophysical Research: Oceans 113.C9 (2008).For more details see Cumbre Vieja#Criticism


Sharp cliffs and associated ocean debris at the Kohala Volcano, Lanai and Molokai indicate that landslides from the flank of the Kilauea and Mauna Loa volcanoes in Hawaii may have triggered past megatsunamis, most recently at 120,000 BP.JOURNAL, McMurtry, Gary M., Fryer, Gerard J., Tappin, David R., Wilkinson, Ian P., Williams, Mark, Fietzke, Jan, Garbe-Schoenberg, Dieter, 1 September 2004, Megatsunami deposits on Kohala volcano, Hawaii, from flank collapse of Mauna Loa, Geology, 32, 9, 741, 10.1130/G20642.1,weblink 2004Geo....32..741M, Watts, Philip, harv, WEB,weblink A Gigantic Tsunami in the Hawaiian Islands 120,000 Years Ago, Gary M., McMurtry, Gerard J., Fryer, David R., Tappin, Ian P., Wilkinson, Mark, Williams, Jan, Fietzke, Dieter, Garbe-Schoenberg, Philip, Watts, September 1, 2004, Geology, 32, SOEST Press Releases, 2008-12-20, JOURNAL, McMurtry, G. M., Tappin, D. R., Fryer, G. J., Watts, P., December 2002, Megatsunami Deposits on the Island of Hawaii: Implications for the Origin of Similar Deposits in Hawaii and Confirmation of the 'Giant Wave Hypothesis', AGU Fall Meeting Abstracts, 51, OS51A–0148, 2002AGUFMOS51A0148M, harv, A tsunami event is also possible, with the tsunami potentially reaching up to about {{convert|1|km|ft}} in heightWEB,weblink The Megatsunami: Possible Modern Threat, Britt, Robert Roy, 14 December 2004, LiveScience, 2008-12-20, According to the documentary National Geographic's Ultimate Disaster: Tsunami, if a big landslide occurred at Mauna Loa or the Hilina Slump, a {{convert|30|m|ft|adj=on}} tsunami would take only thirty minutes to reach Honolulu. There, hundreds of thousands of people could be killed as the tsunami could level Honolulu and travel {{convert|25|km|mi}} inland. Also, the West Coast of America and the entire Pacific Rim could potentially be affected.However, other research suggests that such a single large landslide is not likely. Instead, it would collapse as a series of smaller landslides.WEB,weblink Evaluation of the threat of mega tsunami generation from postulated massive slope failures of island volcanoes on La Palma, Canary Islands, and on the island of Hawaii, Pararas-Carayannis, George, 2002,, 2008-12-20, In 2018, shortly after the beginning of the 2018 lower Puna eruption, a National Geographic article responded to such claims with "Will a monstrous landslide off the side of Kilauea trigger a monster tsunami bound for California? Short answer: No.""No, Hawaii's Volcano Won't Trigger a Mega-Tsunami", National Geographic, Sarah Gibbons, May 17, 2018In the same article, geologist Mika McKinnon stated:Another volcanologist, Janine Krippner, added:Despite this, evidence suggests that catastrophic collapses do occur on Hawaiian volcanoes and generate massive, yet local tsunamis.weblink

Cape Verde Islands

Steep cliffs on the Cape Verde Islands have been caused by catastrophic debris avalanches. These have been common on the submerged flanks of ocean island volcanoes and more can be expected in the future.BOOK, Le Bas, T.P., Slope Failures on the Flanks of Southern Cape Verde Islands, Lykousis, Vasilios, Submarine mass movements and their consequences: 3rd international symposium, Springer, 2007, 978-1-4020-6511-8, harv, {{inconsistent citations, }}

See also



Further reading

  • BBC 2 TV; 2000. Transcript "Mega-tsunami; Wave of Destruction", Horizon. First screened 21.30 hrs, Thursday, 12 October 2000.
  • JOURNAL, 10.1016/0377-0273(94)90053-1, Carracedo, J.C., 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, 1994, 1994JVGR...60..225C, harv,
  • BOOK, Carracedo, J.C., A simple model for the genesis of large gravitational landslide hazards in the Canary Islands, McGuire, W, Jones, Neuberg, J.P., Volcano Instability on the Earth and Other Planets, Geological Society, London, 1996, 125–135, 110, Special Publication,
  • JOURNAL, Carracedo, J.C., Growth, Structure, Instability and Collapse of Canarian Volcanoes and Comparisons with Hawaiian Volcanoes, J. Volcanol. Geotherm. Res., 94, 1–4, 1–19, 1999, 10.1016/S0377-0273(99)00095-5, 1999JVGR...94....1C, harv,
  • JOURNAL, 10.1016/S0377-0273(99)00101-8, Day, S.J., Carracedo, J.C., Guillou, H., Gravestock, P., Recent structural evolution of the Cumbre Vieja volcano, La Palma, Canary Islands: volcanic rift zone re-configuration as a precursor to flank instability, J. Volcanol. Geotherm. Res., 94, 1–4, 135–167, 1999, harv, 1999JVGR...94..135D,weblink,
  • JOURNAL, Moore, J.G., Giant Submarine Landslides on the Hawaiian Ridge, US Geologic Survey, Professional Paper 501-D, D95–8, 1964, harv,
  • JOURNAL, Pararas-Carayannis, G., 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, Science of Tsunami Hazards, 20, 5, 251–277, 2002, harv,
  • JOURNAL, Pinter, N., Ishman, S.E., Impacts, mega-tsunami, and other extraordinary claims, GSA Today, 18, 1, 37–38, 2008, 10.1130/GSAT01801GW.1,weblink harv,
  • Rihm, R; Krastel, S. & CD109 Shipboard Scientific Party; 1998. Volcanoes and landslides in the Canaries. National Environment Research Council News. Summer, 16–17.
  • JOURNAL, Siebert, L., Large volcanic debris avalanches: characteristics of source areas, deposits and associated eruptions, J. Volcanol. Geotherm. Res., 22, 3–4, 163–197, 1984, 10.1016/0377-0273(84)90002-7, 1984JVGR...22..163S, harv,
  • JOURNAL, Vallely, G.A., Volcanic edifice instability and tsunami generation: Montaña Teide, Tenerife, Canary Islands (Spain), Journal of the Open University Geological Society, 26, 1, 53–64, 2005, harv,
  • JOURNAL, Voight, B., Janda, R., Glicken, H., Harry Glicken, Douglas, P.M., Nature and mechanics of the Mount St Helens rockslide-avalanche of 18 May 190, Géotechnique, 33, 10, 243–273, 1983, 10.1680/geot.1983.33.3.243, harv,
  • JOURNAL, Ward, S.N., Day, S., Cumbre Vieja Volcano — Potential collapse and tsunami at La Palma, Canary Islands, Geophysical Research Letters, 28, 17, 3397–3400, 2001, 10.1029/2001GL013110,weblink 2001GeoRL..28.3397W, harv,
  • 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.
  • Bonelli Rubio, J.M., 1950. Contribucion al estudio de la erupcion del Nambroque o San Juan. Madrid: Inst. Geografico y Catastral, 25 pp.
  • 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

{{physical oceanography}}{{Natural disasters}}

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