Tectonics setting of New Zealand. Search for more papers by this author. Ents, orcs and hobbits may have trod upon New Zealand soils, but beneath the southern island lies a giant earthquake fault that may help seismologists understand how the Earth moves and bends, according to a Penn State seismologist. New Zealand's Alpine Fault to Produce a Massive Earthquake—so Scientists Drilled a Big Hole Into It By Rupert Sutherland On 5/18/17 at 6:26 AM EDT New Zealand's South Island. 166 the alpine fault, new zealand: surface geology and field relationships. Research published by scientists from GNS Science in 2012 documented an 8000 year-long record of 24 Alpine Fault earthquakes based on data collected near Lake McKerrow, northeast of Milford Sound. New Zealand’s Alpine Fault is a 600-kilometre right-lateral strike-slip fault that forms the main boundary between the Australian and Pacific plates. The fault is a strike-slip boundary in which the Australian Plate and the Pacific plate are moving horizontally past each other. The goal of the project was to create a safer and stronger South Island, through better preparation, as the Alpine Fault had the potential to impact the whole island, and beyond, she said. 20 years earlier, they had been in tourism in Fiordland NZ, taking international visitors on overnight cruises to see the fiords - and this will become relevant in a moment. But new evidence of a 19th century earthquake indicates that in at least one portion of the fault, smaller earthquakes may occur in between such large rupture events. An Alpine Fault rupture could produce one of the most destructive earthquakes since European settlement of New Zealand because of its geologic characteristics. A rupture along the full length of the fast-slipping Alpine Fault on New Zealand's South Island poses the largest potential seismic threat to the southern and central parts of the country. The Alpine Fault is a major plate boundary structure, which accommodates up to 50-80% of the total plate boundary motion across the South Island of New Zealand. and van der Pluijm [2005] also concluded that the hydrous minerals in the protolith dominate the compositions of the Olivine crystallographic preferred orientations (CPOs) are dominated by orthorhombic CPOs with a tight maxima of [100] orthogonal to (010). A discovery made in the wake of 2016's Kaikoura Earthquake could help scientists better understand how the big-risk Alpine Fault may unravel. The deadliest earthquake in New Zealand was the 1931 Hawke's Bay earthquake, (Napier earthquake) which claimed 256 lives followed by the June … A warning has been issued following a magnitude 5.5 earthquake which rocked New Zealand's South Island on Sunday.. ABSTRACTThe Alpine Fault is very well delineated by recent high-resolution aeromagnetic data sets over much of its length in New Zealand’s South Island. The Alpine Fault is sometimes compared with California’s San Andreas Fault, being another fast-moving strike slip fault near a plate boundary. The Alpine Fault. 55 were here. A group of researchers from Victoria University of Wellington and GNS Science has shown that New Zealand’s Alpine Fault has moved more in the last 25 million years than any other known onland fault on Earth. The drilling project at New Zealand’s Alpine Fault is the first to investigate a major fault that is due to rupture in a big earthquake in coming decades. However, the plates are locked and when they overcome these barriers, they produce large but … GNS Science, Lower Hutt, New Zealand. Langridge said researchers in California and New Zealand have a long history of earthquake science collaboration and are learning from each other about the treatment of active faults and fault segmentation for seismic hazard models. 1a) is a major active crustal-scale structure that ruptures in a large earthquake every 291±23 years, the last one of which occurred in 1717 (Cochran et al., 2017). High risk faults in New Zealand include the Alpine Fault, Wairararapa Fault, Wellington Fault, and Napier Fault. Based on the dates of each earthquake measured using radiocarbon analysis, the researchers calculated an average time between successive large earthquakes of 330 years. The Alpine Fault, which runs 600km along the entire spine of New Zealand's Southern Alps, has a record of rupturing every 300 years. In the south of the Island, it joins the east-directed Fiordland subduction zone while in the north, it splits into several strands that link with the west-directed North Island subduction zone. "One of the issues that makes the Alpine fault interesting is that while it is a strike slip fault for most of its length, it begins in a High Heat Flow and Geothermal Gradient. The last big earthquake happened in 1711. New Zealand’s Alpine Fault biggest mover in the world. The Alpine Fault connects two "subduction" margins where the ocean floor descends into the Earth's mantle. Search for more papers by this author. J. Beavan. We present a quantitative microstructural and seismic property analysis of harzburgitic and lherzolitic xenoliths from East Otago, New Zealand. New Zealand Now scientists have developed an 8,000-year history of major earthquakes at a site along the Alpine fault in New Zealand, that country's version of California's San Andreas fault. The Alpine Fault is a geological fault, known as a right-lateral strike-slip fault, that runs almost the entire length of New Zealand's South Island. Langridge said researchers in California and New Zealand have a long history of earthquake science collaboration and are learning from each other about the treatment of active faults and fault segmentation for seismic hazard models. Alpine Fault Locking Inferred from Geodetic Data. The geology of New Zealand makes that an incredibly complex question to answer - but a new study evaluating millions of different earthquake scenarios will give us a much better idea. New evidence of a 19th century earthquake on New Zealand's Alpine fault suggests that in at least one portion of the fault, smaller earthquakes may occur in between such large rupture events. The fault is the main constituent of the oblique transform boundary between … ... Alpine Fault Geometry and Physical Properties at Depth. At this point the surfaces of the two plates making up the South Islands alpine fault meet. A rupture along the full length of the fast-slipping Alpine Fault on New Zealand’s South Island poses the largest potential seismic threat to the southern and central parts of the country. A 'swarm of activity' along New Zealand's Alpine fault-line on Tuesday has prompted fears of devastating tsunamis and a 'megathrust' quake which has the power to kill hundreds of thousands. “It’s important because it points either towards or away from Wellington and that could have a significant impact on the level of ground shaking in the next earthquake.” The Alpine Fault runs right through the heart of New Zealand's glacier county on the country's south island. Guided educational tours to the natural exposure of the Alpine Fault at Gaunt Creek, near Whataroa, South Westland. Victoria University of Wellington, Wellington, New Zealand. New Zealand's Alpine Fault (Fig. * Magnitude-8.2: The disaster scenario on New Zealand's most dangerous fault * Preparing for the big one on the Alpine Fault * Alpine Fault moves more than any other known land fault An Alpine Fault earthquake will be felt by every South Islander and likely many North Islanders, too. Its plate movements, considered to be fast by global standards, at ≈ 3 centimetres per year, forged and shaped the Southern Alps mountain range. The Alpine Fault is sometimes compared with California’s San Andreas Fault, being another fast-moving strike slip fault near a plate boundary. The Alpine Fault. The Wairau Fault links up with the Alpine Fault near the Nelson Lakes it extends for about 140 kilometres, he says. Alpine Fault Tours began in 2012 when Gray and Vickie Eatwell bought a farm next to the natural exposure of the Alpine Fault, at Gaunt Creek, near Whataroa in South Westland, New Zealand. 8 Mar 2016. New study plumbs the depths of the Wairau and Alpine faults • Source: It's no surprise to most of us that New Zealand is perched on top of a collection of fault lines.
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