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Prehistoric Tsunamis ...
Prehistoric tsunamis are tsunamis and so-called " megatsunamis" that occurred before recorded history. The events have been identified through oral tradition and/or geological evidence. Those events that have been identified through contemporary records are listed as historic tsunamis. List References {{portalbar, Oceans, Tsunamis Prehistoric tsunamis A tsunami ( ; from ja, 津波, lit=harbour wave, ) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater expl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tsunami
A tsunami ( ; from ja, 津波, lit=harbour wave, ) is a series of waves in a water body caused by the displacement of a large volume of water, generally in an ocean or a large lake. Earthquakes, volcanic eruptions and other underwater explosions (including detonations, landslides, glacier calvings, meteorite impacts and other disturbances) above or below water all have the potential to generate a tsunami. Unlike normal ocean waves, which are generated by wind, or tides, which are in turn generated by the gravitational pull of the Moon and the Sun, a tsunami is generated by the displacement of water from a large event. Tsunami waves do not resemble normal undersea currents or sea waves because their wavelength is far longer. Rather than appearing as a breaking wave, a tsunami may instead initially resemble a rapidly rising tide. For this reason, it is often referred to as a tidal wave, although this usage is not favoured by the scientific community because it mig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Etna
Mount Etna, or simply Etna ( it, Etna or ; scn, Muncibbeḍḍu or ; la, Aetna; grc, Αἴτνα and ), is an active stratovolcano on the east coast of Sicily, Italy, in the Metropolitan City of Catania, between the cities of Messina and Catania. It lies above the convergent plate margin between the African Plate and the Eurasian Plate. It is one of the tallest active volcanoes in Europe, and the tallest peak in Italy south of the Alps with a current height (July 2021) of , though this varies with summit eruptions. Over a six-month period in 2021, Etna erupted so much volcanic material that its height increased by approximately , and the southeastern crater is now the tallest part of the volcano. Etna covers an area of with a basal circumference of . This makes it by far the largest of the three active volcanoes in Italy, being about two and a half times the height of the next largest, Mount Vesuvius. Only Mount Teide on Tenerife in the Canary Islands surpasses it i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BBC Two
BBC Two is a British free-to-air public broadcast television network owned and operated by the BBC. It covers a wide range of subject matter, with a remit "to broadcast programmes of depth and substance" in contrast to the more mainstream and popular BBC One. Like the BBC's other domestic TV and radio channels, it is funded by the television licence, and is therefore free of commercial advertising. It is a comparatively well-funded public-service network, regularly attaining a much higher audience share than most public-service networks worldwide. Originally styled BBC2, it was the third British television station to be launched (starting on 21 April 1964), and from 1 July 1967, Europe's first television channel to broadcast regularly in colour. It was envisaged as a home for less mainstream and more ambitious programming, and while this tendency has continued to date, most special-interest programmes of a kind previously broadcast on BBC Two, for example the BBC Proms, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Réunion
Réunion (; french: La Réunion, ; previously ''Île Bourbon''; rcf, label= Reunionese Creole, La Rényon) is an island in the Indian Ocean that is an overseas department and region of France. It is located approximately east of the island of Madagascar and southwest of the island of Mauritius. , it had a population of 868,846. Like the other four overseas departments, Réunion also holds the status of a region of France, and is an integral part of the French Republic. Réunion is an outermost region of the European Union and is part of the eurozone. Réunion and the fellow French overseas department of Mayotte are the only eurozone regions located in the Southern Hemisphere. As in the rest of France, the official language of Réunion is French. In addition, a majority of the region's population speaks Réunion Creole. Toponymy When France took possession of the island in the seventeenth century, it was named Bourbon, after the dynasty that then ruled France. To br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Garth Tsunami
The Garth tsunami is a likely prehistoric tsunami off the Shetland Islands that may have occurred 5,500 years ago (3,500 BCE). Its origin is unknown; impact events, earthquakes, and submarine landslides similar to the Storegga Slide 8,100 years ago (6,100 BCE) have been proposed as factors contributing to the event. Evidence suggests a run-up of more than in the Shetland Islands. It probably had great impact on coastal communities in the region; mass burials dating approximately to that time in the Shetland and Orkney Islands have been interpreted to host its fatalities. Name, chronology and size The tsunami is named after Garth Loch. It likely took place approximately 5,500 years ago and also is known as the "5,500 BP event". It generated a run-up of more than in the Shetland Islands. This tsunami is one of three thought to have hit Scotland during the Holocene although the occurrence of this of a later one are considered uncertain. Deposits Deposits from the tsunami have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Isles
The Northern Isles ( sco, Northren Isles; gd, Na h-Eileanan a Tuath; non, Norðreyjar; nrn, Nordøjar) are a pair of archipelagos off the north coast of mainland Scotland, comprising Orkney and Shetland. They are part of Scotland, as are the Hebrides. The climate is cool and temperate and much influenced by the surrounding seas. There are a total of 36 inhabited islands. The landscapes of the fertile agricultural islands of Orkney contrast with the more rugged Shetland islands to the north, where the economy is more dependent on fishing and on the oil wealth of the surrounding seas. Both island groups have a developing renewable energy industry. Both have a Picts, Pictish and Norse activity in the British Isles, Norse history. Both were part of the Norway, Kingdom of Norway until they were absorbed into the Kingdom of Scotland in the 15th century. They remained part of it until the 1707 formation of the Kingdom of Great Britain and the 1801 formation of the United Kingdom. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Storegga Slide
The three Storegga Slides ( no, Storeggaraset) are amongst the largest known submarine landslides. They occurred at the edge of Norway's continental shelf in the Norwegian Sea, approximately 6225–6170 BCE. The collapse involved an estimated length of coastal shelf, with a total volume of of debris, which caused a tsunami in the North Atlantic Ocean. Description Storegga ( Norwegian: ''Great Edge'') is located at the edge of Norway's continental shelf in the Norwegian Sea, north-west of the Møre coast. In around 6200 BCE, structural failures of the shelf caused three underwater landslides, which triggered very large tsunamis in the North Atlantic Ocean. The collapses involved an estimated length of coastal shelf, with a total volume of of debris. Based on carbon dating of plant material recovered from sediment deposited by the tsunamis, the latest incident occurred around approximately 6225–6170 BCE. In Scotland, traces of the subsequent tsunami have been recorded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norwegian Sea
The Norwegian Sea ( no, Norskehavet; is, Noregshaf; fo, Norskahavið) is a marginal sea, grouped with either the Atlantic Ocean or the Arctic Ocean, northwest of Norway between the North Sea and the Greenland Sea, adjoining the Barents Sea to the northeast. In the southwest, it is separated from the Atlantic Ocean by a submarine ridge running between Iceland and the Faroe Islands. To the north, the Jan Mayen Ridge separates it from the Greenland Sea. Unlike many other seas, most of the bottom of the Norwegian Sea is not part of a continental shelf and therefore lies at a great depth of about two kilometres on average. Rich deposits of oil and natural gas are found under the sea bottom and are being explored commercially, in the areas with sea depths of up to about one kilometre. The coastal zones are rich in fish that visit the Norwegian Sea from the North Atlantic or from the Barents Sea (cod) for spawning. The warm North Atlantic Current ensures relatively stable and high w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atlit Yam
Atlit Yam is an ancient submerged Neolithic village off the coast of Atlit, Israel. It has been carbon-dated as to be between 8,900 and 8,300 years old. Among the features of the 10-acre site is a stone circle. History Atlit-Yam provides the earliest known evidence for an agro-pastoral-marine subsistence system on the Levantine coast. The site of Atlit Yam has been carbon-dated to be between 8,900 and 8,300 years old (calibrated dates) and belongs to the final Pre-Pottery Neolithic B period. It is currently between 8–12 m (25–40 ft) beneath sea level in the Mediterranean Sea, in the Bay of Atlit, at the mouth of the Oren river on the Carmel coast. It covers an area of ca. 40,000 square meters (10 acres). Underwater excavations have uncovered rectangular houses and a well. The site was covered by the eustatic rise of sea levels after the end of the last Ice Age. It is assumed that the contemporary coastline was about 1 km (a half-mile) west of the present coa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sicily
(man) it, Siciliana (woman) , population_note = , population_blank1_title = , population_blank1 = , demographics_type1 = Ethnicity , demographics1_footnotes = , demographics1_title1 = Sicilian , demographics1_info1 = 98% , demographics1_title2 = , demographics1_info2 = , demographics1_title3 = , demographics1_info3 = , timezone1 = CET , utc_offset1 = +1 , timezone1_DST = CEST , utc_offset1_DST = +2 , postal_code_type = , postal_code = , area_code_type = ISO 3166 code , area_code = IT-82 , blank_name_sec1 = GDP (nominal) , blank_info_sec1 = €89.2 billion (2018) , blank1_name_sec1 = GDP per capita , blank1_info_sec1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seton Portage, British Columbia
Seton Portage () is a community located on a narrow strip of land between Anderson Lake and Seton Lake in Squamish-Lillooet Regional District, British Columbia. The community is home to two Seton Lake First Nation communities at either end of the portage and a non-native recreational community between them. Local services include a post office, fire department, library, and general store, among other small businesses. The community is also the location of Seton Portage Historic Provincial Park, a small provincial park protecting a historically significant stretch of railway. Geology "The Portage" was formed about 10,000 years ago when the flank of the Cayoosh Range, which is the south flank of the valley, let go and slid into the middle of what had been a single lake. The result is a location similar to Interlaken, Switzerland, with two fjord-style lakes flanking a narrow and very short strip of land between them. Remnants of old lake bottom survive as benchlands lining the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Megatsunami
A 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 ordinary tsunamis. Ordinary tsunamis are caused by underwater tectonic activity (movement of the earth's plates) and therefore occur along plate boundaries and as a result of earthquakes and the subsequent rise or fall in the sea floor that displaces a volume of water. Ordinary tsunamis exhibit shallow waves in the deep waters of the open ocean that increase dramatically in height upon approaching land to a maximum run-up height of around in the cases of the most powerful earthquakes. By contrast, megatsunamis occur when a large amount of material suddenly falls into water or anywhere near water (such as via a meteor impact or volcanic activity). They can have extremely large initial wave heights ranging from hundreds and possibly up to thousands of metres, far beyond the height of any ordinary tsunami. These giant wave hei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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