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2012 Kermadec Islands Eruption
The 2012 Kermadec Islands eruption was a major undersea volcanic eruption that was produced by the previously little-known Havre Seamount near the L'Esperance and L'Havre Rocks in the Kermadec Islands of New Zealand. The large volume of low density pumice produced by the eruption accumulated as a large area of floating pumice, a ''pumice raft,'' that was originally covering a surface of , spread to a continuous float of between and within three months dispersed to an area of more than twice the size of New Zealand.Website of the expedition ''Mesh'' The thickness of the raft may initially have been as high as and was reduced to around within a month. Three months after the eruption, the mass had dispersed into very dilute rafts and ribbons of floating pumice clasts. Most pumice clasts became waterlogged and sank to the sea floor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Havre Seamount
Havre Seamount is an active volcanic seamount lying within the Kermadec Islands group of New Zealand, in the south-west Pacific Ocean, on the Tonga-Kermadec Ridge. Its 2012 Kermadec Islands eruption, most recent eruption took place in July 2012. See also *Monowai (seamount) References Active volcanoes Seamounts of New Zealand Geography of the Kermadec Islands Volcanoes of New Zealand {{OutlyingNZ-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seismic Activity
An earthquakealso called a quake, tremor, or tembloris the shaking of the Earth's surface resulting from a sudden release of energy in the lithosphere that creates seismic waves. Earthquakes can range in intensity, from those so weak they cannot be felt, to those violent enough to propel objects and people into the air, damage critical infrastructure, and wreak destruction across entire cities. The seismic activity of an area is the frequency, type, and size of earthquakes experienced over a particular time. The seismicity at a particular location in the Earth is the average rate of seismic energy release per unit volume. In its most general sense, the word ''earthquake'' is used to describe any seismic event that generates seismic waves. Earthquakes can occur naturally or be induced by human activities, such as mining, fracking, and nuclear weapons testing. The initial point of rupture is called the hypocenter or focus, while the ground level directly above it is the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queensland University Of Technology
The Queensland University of Technology (QUT) is a public university, public research university located in the city of Brisbane in Queensland, Australia. It has two major campuses, a modern city campus in Gardens Point, Brisbane, Gardens Point and a historical campus in Kelvin Grove, Queensland, Kelvin Grove. The university offers courses in fields including architecture, engineering, information technology, healthcare, teaching, law, arts and design, science and mathematics. QUT operated as the Queensland Institute of Technology (QIT'')'' established in 1965 receiving university status by act of Parliament of Queensland in 1988. Queensland University of Technology commenced operations the following year in January 1989. The Brisbane College of Advanced Education, an amalgamation of tertiary colleges dating back to 1849, merged with QUT expanding to its Kelvin Grove site in 1990. In 2022, QUT enrolled 50,216 students, including 37,860 undergraduate and 11,760 postgraduate stud ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Auckland
Auckland ( ; ) is a large metropolitan city in the North Island of New Zealand. It has an urban population of about It is located in the greater Auckland Region, the area governed by Auckland Council, which includes outlying rural areas and the islands of the Hauraki Gulf, and which has a total population of as of It is the List of cities in New Zealand, most populous city of New Zealand and the List of cities in Oceania by population, fifth-largest city in Oceania. The city lies between the Hauraki Gulf to the east, the Hunua Ranges to the south-east, the Manukau Harbour to the south-west, and the Waitākere Ranges and smaller ranges to the west and north-west. The surrounding hills are covered in rainforest and the landscape is dotted with 53 volcanic centres that make up the Auckland Volcanic Field. The central part of the urban area occupies a narrow isthmus between the Manukau Harbour on the Tasman Sea and the Waitematā Harbour on the Pacific Ocean. Auckland is one of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Faleolo
Faleolo is a village on the island of Upolu in Samoa. The village is just south of Faleolo International Airport Faleolo International Airport is an airport located west of Apia, the capital of Samoa. Until 1984, Faleolo could not accommodate jets larger than a Boeing 737. Services to the United States, Australia, or New Zealand, could only land at Pago ... and is part of A'ano Alofi 4 Electoral Constituency (''Faipule District'') which forms part of the larger A'ana political district. As of the 2021 census, the population is 15. References Populated places in A'ana {{Samoa-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eddies
In fluid dynamics, an eddy is the swirling of a fluid and the reverse current created when the fluid is in a turbulent flow regime. The moving fluid creates a space devoid of downstream-flowing fluid on the downstream side of the object. Fluid behind the obstacle flows into the void creating a swirl of fluid on each edge of the obstacle, followed by a short reverse flow of fluid behind the obstacle flowing upstream, toward the back of the obstacle. This phenomenon is naturally observed behind large emergent rocks in swift-flowing rivers. An eddy is a movement of fluid that deviates from the general flow of the fluid. An example for an eddy is a vortex which produces such deviation. However, there are other types of eddies that are not simple vortices. For example, a Rossby wave is an eddy which is an undulation that is a deviation from mean flow, but does not have the local closed streamlines of a vortex. Swirl and eddies in engineering The propensity of a fluid to swirl is us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NBC News
NBC News is the news division of the American broadcast television network NBC. The division operates under NBCUniversal Media Group, a division of NBCUniversal, which is itself a subsidiary of Comcast. The news division's various operations report to the president of NBC News, Rebecca Blumenstein. The NBCUniversal News Group also comprises MSNBC, the network's 24-hour liberal cable news channel, as well as business and consumer news channels CNBC and CNBC World, the Spanish language and United Kingdom-based Sky News. NBC News aired the first regularly scheduled news program in American broadcast television history on February 21, 1940. The group's broadcasts are produced and aired from 30 Rockefeller Plaza, NBCUl's headquarters in New York City. The division presides over the flagship evening newscast ''NBC Nightly News'', the world's first of its genre morning television program, ''Today (American TV program), Today'', and the longest-running television series in American hi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Tongariro
Mount Tongariro (; ) is a compound volcano in the Taupō Volcanic Zone of the North Island of New Zealand. It is located to the southwest of Lake Taupō, and is the northernmost of the three active volcanoes that dominate the landscape of the central North Island. Geology Mount Tongariro is part of the Tongariro volcanic centre, which consists of four massifs made of andesite: Tongariro, Kakaramea-Tihia Massif, Pihanga, and Ruapehu at the southern end of the North Island Volcanic Plateau. The andesitic eruptions formed Tongariro, a steep stratovolcano, reaching a height of . Tongariro is composed of layers of both lava and tephra and the eruptions that built the current stratovolcano commenced about 275,000 years ago. Tongariro consists of at least 12 cones. Ngauruhoe, while often regarded as a separate mountain, is geologically a cone of Tongariro. It is also the most active vent, having erupted more than 70 times since 1839, the last episode in 1973 to 1975. Activ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monowai Seamount
Monowai Seamount is a Volcano, volcanic seamount to the north of New Zealand. It is formed by a large caldera and a volcanic cone just south-southeast from the caldera. The volcanic cone rises to depths of up to but its depth varies with ongoing volcanic activity, including sector collapses and the growth of lava domes. The seamount and its volcanism were discovered after 1877, but only in 1980 was it named "Monowai" after a research ship of the same name. The subduction of the Pacific plate beneath the Australia plate has given rise to volcanic and hydrothermal activity on the Kermadec Ridge that Monowai is part of. The volcano is located at the site where the Osbourn Trough and the Louisville seamount chain subduct in the Tonga Trench and this subduction process probably has influenced its volcanism. Monowai is one of the most active volcanoes in the Kermadec Islands, Kermadec volcanic arc, with many eruptions since 1977, and perhaps the most active submarine volcano in the wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic Ash
Volcanic ash consists of fragments of rock, mineral crystals, and volcanic glass, produced during volcanic eruptions and measuring less than 2 mm (0.079 inches) in diameter. The term volcanic ash is also often loosely used to refer to all explosive eruption products (correctly referred to as '' tephra''), including particles larger than 2 mm. Volcanic ash is formed during explosive volcanic eruptions when dissolved gases in magma expand and escape violently into the atmosphere. The force of the gases shatters the magma and propels it into the atmosphere where it solidifies into fragments of volcanic rock and glass. Ash is also produced when magma comes into contact with water during phreatomagmatic eruptions, causing the water to explosively flash to steam leading to shattering of magma. Once in the air, ash is transported by wind up to thousands of kilometres away. Due to its wide dispersal, ash can have a number of impacts on society, including animal a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Magma Chamber
A magma chamber is a large pool of liquid rock beneath the surface of the Earth. The molten rock, or magma, in such a chamber is less dense than the surrounding country rock, which produces buoyant forces on the magma that tend to drive it upwards. If the magma finds a path to the surface, then the result will be a volcanic eruption; consequently, many volcanoes are situated over magma chambers. These chambers are hard to detect deep within the Earth, and therefore most of those known are close to the surface, commonly between 1 km and 10 km down. Dynamics of magma chambers Magma rises through cracks from beneath and across the crust because it is less dense than the surrounding rock. When the magma cannot find a path upwards it pools into a magma chamber. These chambers are commonly built up over time, by successive horizontal or vertical magma injections. The influx of new magma causes reaction of pre-existing crystals and the pressure in the chamber to increa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
