Hikurangi Margin
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Hikurangi Margin
The Hikurangi Margin (also known as the Hikurangi Subduction Zone) is New Zealand's largest subduction zone and fault. Tectonics The Hikurangi Subduction Zone is an active subduction zone extending off the east coast of New Zealand's North Island, where the Pacific and Australian plates collide. The subduction zone where the Pacific Plate goes under the Kermadec Plate offshore of Gisborne accommodates approximately /yr of plate movement while off the Wairarapa shore this decreases to perhaps as low as /yr. It is the southern portion of the Tonga–Kermadec–Hikurangi subduction zone and its main feature is the Hikurangi Trench. The tectonics of this area can be most easily resolved by postulating between the Havre Trough to the east of the South Kermadec Ridge Seamounts, the Whakatane graben and the Taupo Volcanic Zone on the North Island of New Zealand there is a continuation of the Tonga micro-plate into the Kermadec microplate which probably extends to Cook Strait. The on ...
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Hikurangi
Hikurangi is a settlement in Northland, New Zealand. The city of Whangārei is 17 km (11 miles) to the south, and Kawakawa is 39 km (24 miles) northwest. The Glenbervie Forest is southeast of the settlement. State Highway 1 once passed through the town, but now bypasses it to the west. Mount Hikurangi is a volcanic dome rising 365 metres (1,198 ft) to the west of the town. It is 1.2 million years old, and part of the Harbour Fault which also includes Parakiore, near Kamo, and Parihaka in Whangarei. Hikurangi is a service town for the local dairy industry. History An area of of land at Hikurangi was purchased from local Maori by the District Commissioner of Lands in 1862. The land was considered desirable because it contained mature timber and high quality flax, and transport routes were established. The area became a timber milling centre with the establishment of a road to Whangarei in 1875, and the first of several sawmills soon after. Kauri gum- ...
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The University Of Waikato
, mottoeng = For The People , established = 1964; years ago , endowment = (31 December 2021) , budget = NZD $263.6 million (31 December 2020) , chancellor = Sir Anand Satyanand, GNZM, QSO, KStJ , vice_chancellor = Neil Quigley , city = Hamilton , province = Waikato , country = New Zealand (Māori: ''Kirikiriroa, Waikato, Aotearoa'') , administrative_staff = 1,499 (FTS, 2020) , students = 10,448 (EFTS, 2020) , type = Public research university , campus = Suburban 65 ha (160 acres) , colours = UW Red, Gold and Black , affiliations = ACU, ASAIHL, AACSB, AMBA, EQUIS , website Waikato.ac.nz, logo = The University of Waikato ( mi, Te Whare Wānanga o Waikato), is a public research university in Hamilton, New Zealand established in 1964. An additional campus is located in Tauranga. The university performs research in the disciplines of education, social sciences, and management and is an innovator in environmental science, marine and freshwater ecology, en ...
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1947 Gisborne Earthquakes And Tsunami
The 1947 Gisborne earthquakes and tsunami occurred east of Gisborne and offshore from New Zealand's North Island. Both the two earthquakes are estimated to have measured at most 7.1 on the moment magnitude scale. The first earthquake, which struck offshore Poverty Bay on 26 March 1947 at 8:32am NZST, seemed like a minor earthquake in Gisborne, but was 7.0–7.1 . It generated a tsunami with a maximum measured run-up height of 10 metres that struck the coast from Māhia Peninsula to Tokomaru Bay, swamping the coast between Muriwai and Tolaga Bay 30 minutes after the quake. The tsunami was not observed outside of New Zealand. Four people at the Tatapouri Hotel, 13 kilometres by road north of Gisborne, saw the tsunami coming and rushed up a hill. Two waves swept through the ground floor of the hotel up to window sill height, and retreating water then washed small buildings out to sea. A little further north at Turihaua, a 10-metre high wave hit a cottage, sweeping two men who wer ...
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2016 Te Araroa Earthquake
The 2016 Te Araroa earthquake was an earthquake measuring 7.1 on the moment magnitude scale that occurred at 04:37:55 NZST on 2 September 2016 (16:37:55 UTC 1 September). The epicentre was located north-east of Te Araroa off the East Cape of the North Island of New Zealand with a focal depth of . The earthquake was widely felt throughout the North Island and in the upper South Island. There were no reported casualties, and buildings predominantly suffered only a little bit of damage. Earthquake Foreshock A magnitude 5.7 earthquake was recorded at 10:04:35 NZST on 1 September 2016, one day prior to the main earthquake. Aftershocks A series of aftershocks followed the earthquake, the largest being a magnitude 6.2 earthquake which occurred at 05:15:05 NZST on 2 September. Dozens of smaller aftershocks were also recorded, with 18 measuring magnitude 5.0 or greater as of 4 November 2016. GeoNet forecast the probability of one or more additional aftershocks measuring betw ...
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Cape Kidnappers
for "''the jawbone of Māui''" * for "''the fish hook of Māui''" , , type = Cape , photo = Cape Kidnappers.jpg , photo_width = , photo_alt = , photo_caption = Looking northeast towards Cape Kidnappers / Te Kauwae-a-Māui , map = New Zealand , map_width = , map_caption = Location of Cape Kidnappers / Te Kauwae-a-Māui in New Zealand , map_alt = , relief = yes , label = Cape Kidnappers , label_position = , mark = , marker_size = , location = , coordinates = , coordinates_ref = , range = , part_of = , water_bodies = South Pacific Ocean , elevation_ft = , elevation_ref = , surface_elevation_ft = , surface_elevation_ref = , highest_point = , highest_elevation = , highest_coords = , length = , width = , area = , d ...
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Slow Earthquake
A slow earthquake is a discontinuous, earthquake-like event that releases energy over a period of hours to months, rather than the seconds to minutes characteristic of a typical earthquake. First detected using long term strain measurements, most slow earthquakes now appear to be accompanied by fluid flow and related tremor, which can be detected and approximately located using seismometer data filtered appropriately (typically in the 1–5 Hz band). That is, they are quiet compared to a regular earthquake, but not "silent" as described in the past. Slow earthquakes should not be confused with tsunami earthquakes, in which relatively slow rupture velocity produces tsunami out of proportion to the triggering earthquake. In a tsunami earthquake, the rupture propagates along the fault more slowly than usual, but the energy release occurs on a similar timescale to other earthquakes. __TOC__ Causes Earthquakes occur as a consequence of gradual stress increases in a region, and ...
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Ruatoria
Ruatoria ( mi, Ruatōria) is a town in the Waiapu Valley of the Gisborne Region in the northeastern corner of New Zealand's North Island. The town was originally known as Cross Roads then Manutahi and was later named Ruatorea in 1913, after the Māori Master female grower ''Tōrea'' who had some of the finest storage pits in her Iwi at the time (Te-Rua-a-Tōrea ). In 1925 the name was altered to "Ruatoria", although some texts retain the original spelling. Ruatoria's Whakarua Park is the home of the East Coast Rugby Football Union. Demographics The population of Ruatoria was 759 in the 2018 census, an increase of 39 from 2013. There were 396 males and 360 females. 20.2% of people identified as European/Pākehā and 95.3% as Māori. 32.0% were under 15 years old, 21.3% were 15–29, 37.6% were 30–64, and 9.1% were 65 or older. The statistical area of Ruatoria-Raukumara, which at 693 square kilometres is much larger than this town, had a population of 1,233 at the 2018 New Zeal ...
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Oceanography (journal)
''Oceanography'' is a quarterly peer-reviewed scientific journal that publishes articles about ocean science and its applications. It is published by The Oceanography Society, a nonprofit professional society based in the United States. In addition to its scientific articles, the journal also has a special section for news and information, society meeting reports, book reviews, and shorter editor-reviewed articles on public policy and education. One section, titled "Breaking Waves", is for short papers describing novel multidisciplinary approaches to oceanographic problems. The journal and all its back issues, dating to 1988, are available both in print and in full PDF format online in the journal website's archives. ''Oceanography'' is abstracted and indexed in the Science Citation Index Expanded. According to the ''Journal Citation Reports'', the journal had an impact factor of 3.431 in 2019. In 2022, the journal had an h-index The ''h''-index is an author-level metri ...
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Cook Strait
Cook Strait ( mi, Te Moana-o-Raukawa) separates the North and South Islands of New Zealand. The strait connects the Tasman Sea on the northwest with the South Pacific Ocean on the southeast. It is wide at its narrowest point,McLintock, A H, Ed. (1966''Cook Strait''from An Encyclopaedia of New Zealand, updated 18-Sep-2007. Note: This is the distance between the North Island and Arapaoa Island; some sources give a slightly larger reading of around , that between the North Island and the South Island. and is considered one of the most dangerous and unpredictable waters in the world. Regular ferry services run across the strait between Picton in the Marlborough Sounds and Wellington. The strait is named after James Cook, the first European commander to sail through it, in 1770. In Māori it is named ''Te Moana-o-Raukawa'', which means ''The Sea of Raukawa''. Raukawa is a type of woody shrub native to New Zealand. History Approximately 18,000 years ago during the Last Gla ...
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South Kermadec Ridge Seamounts
The South Kermadec Ridge Seamounts are a continuation of the volcanic island arc, formed at the convergent boundary where the Pacific Plate subducts under the Indo-Australian Plate. The subducting Pacific Plate created the Kermadec Trench, the second deepest submarine trench, to the east of the islands. The seamounts lie along the western aspect of the undersea Kermadec Ridge, which runs southwest from the Kermadec Islands towards the North Island of New Zealand and northeast towards Tonga (Kermadec-Tonga Arc). This area of the Kermadec Arc - Havre Trough is a relatively young oceanic arc-back-arc system as it became active in the Quaternary. The seamounts include: * Speight Knoll * Oliver Knoll * Haungaroa Seamount * Kuiwai Seamount * Cole Seamount * Ngātoroirangi Seamount * Sonne Seamount * Kibblewhite Seamount * Gill Seamount **Situated in the middle of a deep basin (3000m deep) to the west of Kibblewhite and actually closer to the Lau-Colville Ridge than the ...
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