[8]. Where will the next earthquake centred on the Alpine Fault begin? D'autres semblent aussi avoir pris le temps de l'apprécier. It remained the single largest earthquake to strike Hawke's Bay until 1931, where a magnitude 7.8 quake leveled much of Napier and Hastings and killed 256 people. of the Alpine Fault R.M. Here the relative motion between the two plates averages 37–40 mm a year. Alpine Fault. dating trees buried by landslides using radiocarbon dating and tree growth rings (dendrochronology). Virginia currently works as a Professor at the University of Mainz. [2] In outcrop the fault zone is overlain by mylonites which formed at depth and have been uplifted by the fault. The 1888 North Canterbury earthquake occurred at 4:10 am on 1 September following a sequence of foreshocks that started the previous evening, and whose epicentre was in the North Canterbury region of the South Island of New Zealand. [23] Wellman also proposed in 1964 that the Alpine Fault was a Cenozoic structure, which was in conflict with the older Mesozoic age accepted at the time. There have been no major earthquakes on the Alpine Fault in historic times, its southern and northern offshoots have, however, experienced sizable earthquakes: In 2012, GNS Science researchers published an 8000-year timeline of 24 major earthquakes on the (southern end of the) fault from sediments at Hokuri Creek, near Lake McKerrow in north Fiordland. The Marlborough Fault System is a set of four large dextral strike-slip faults and other related structures in the northern part of South Island, New Zealand, which transfer displacement between the mainly transform plate boundary of the Alpine fault and the mainly destructive boundary of the Kermadec Trench, and together form the boundary between the Australian and Pacific Plates. [1] [3], The Pacific Plate and Indo-Australian Plate boundary forms the Macquarie Fault Zone in the Puysegur Trench off the southwestern corner of the South Island and comes onshore as the Alpine Fault just north of Milford Sound. The horizontal movement along the fault is not smooth, as both sides are locked together. Guided educational tours to the natural exposure of the Alpine fault, at Gaunt Creek, near Whataroa, South Westland. JFAST gathered important data about the rupture mechanism and physical properties of the fault that caused the huge earthquake and tsunami which devastated much of northeast Japan. The 2014 Eketahuna earthquake struck at 3:52 pm on 20 January, centred 15 km east of Eketahuna on the south-east of New Zealand's North Island. A transform (oceanic) or strike-slip (continental) fault is one where the relative motion is horizontal. The geology of New Zealand is noted for its volcanic activity, earthquakes and geothermal areas because of its position on the boundary of the Australian Plate and Pacific Plates. Alpine Fault discography (all) Severance (2005) Fire at Will Records Sampler (2012) > Iraena's Ashes Alpine Fault. This method can even indicate rocks rich in high-pressure water, the source of hot springs like those at Hanmer Springs. The Australian plate is sliding horizontally towards the north-east, at the same time as the Pacific plate is pushing up, forming the Southern Alps. In earthquake terms, the 850 kilometres (530 mi) long fault is remarkably consistent, rupturing on average every 330 years, at intervals ranging from 140 years to 510 years. Three feature sets are delineated. [9] However, it is now inferred by multiples lines of evidence that the Alpine Fault ruptures creating major earthquakes about every few hundred years. The Alpine fault is the Pacific-Australian plate boundary in the South Island of New Zealand. This includes mylonites and the Alpine Schist, which increases in metamorphic grade towards the fault. The uplift is due to an element of convergence between the plates, meaning that the fault has a significant high-angle reverse oblique component[ clarification needed ] to its displacement. Holes were drilled for explosives, and when the explosives were set off, a multi-channel seismograph recorded the seismic waves. Tremors continued almost continuously until midnight and sporadic strong aftershocks were felt for several days. However, most of the motion on the fault is strike-slip (side to side), with the Tasman district and West Coast moving North and Canterbury and Otago moving South. GNS Science has this earthquake catalogued and places the epicenter 35 km east of Taihape, near the border of Hawke's Bay. The work involves scientists from several disciplines working together, using different methods, such as: Using techniques like these, scientists such as Mark Yetton of the University of Canterbury have found out that major earthquakes happened on the central Alpine Fault in 1100, 1450, 1620 and 1717. The Alpine Fault is a geological fault, specifically a right-lateral strike-slip fault, that runs almost the entire length of New Zealand’s South Island. This is distributed as 36–39 mm of horizontal and 6–10 mm upwards movement on the fault's plane per year. [25], The Deep Fault Drilling Project (DFDP) was an attempt in 2014 to retrieve rock and fluid samples and make geophysical measurements inside the Alpine Fault zone at depth. The average slip rates in the fault's central region are about 38mm a year, very fast by global standards. Alpine Fault. One set, comprising foliation and foliation‐parallel veins and fractures, has a constant orientation. Famous examples of these include the San Andreas Fault of California, the Alpine Fault of New Zealand's south island, and the Anatolian Fault in Turkey [4], The Indo-Australian Plate is subducting towards the east south of the South Island and the Pacific Plate is subducting towards the West to the north. Lateral displacements of this magnitude could not be explained by pre-plate tectonics geology and his ideas were not initially widely accepted until 1956. It forms part of the Marlborough Fault System, which accommodates the transfer of displacement along the oblique convergent boundary between the Indo-Australian Plate and Pacific Plate, from the transform Alpine Fault to the Hikurangi Trench subduction zone. [1] The Southern Alps have been uplifted on the fault over the last 12 million years in a series of earthquakes. The Hope Fault is thought to represent the primary continuation of the Alpine Fault. Type: Full-length Release date: November 11th, 2011 Catalog ID: N/A Label: Independent Format: CD Reviews: None yet Songs; Lineup; Reviews; Additional notes; 1. Virginia Toy is a New Zealand geologist who studies fault zones and earthquakes in New Zealand, Japan and Ecuador. Into the Night 05:10 Show lyrics (loading lyrics...) 2. This fault has ruptured four times in the past 900 years, each time producing an earthquake of about magnitude 8. Travelers talk about “tectonic plates” (5 reviews) “fault line” (4 reviews) “continental plates” (3 reviews) Improve This Listing. Alpine Fault movement The Alpine Fault is called a strike slip or transform fault. See this Interactive map of the Alpine Fault and links to a virtual field trip on the University of Otago Geology website. This displacement was inferred by Wellman due in part to the similarity of rocks in Southland and Nelson on either side of the Alpine Fault. In the new study, the interval between earthquakes ranged from 160 to 350 years and the probability of an earthquake occurring in the following 50 years was estimated at 29 per cent. [5] Then uplift slowly began as the plate motion became slightly oblique to the strike of the Alpine Fault. Part 2 of Alpine Fault in Profile. The Australian plate is sliding horizontally towards the north-east, at the same time as the Pacific plate is pushing up, forming the Southern Alps. Le temps de l'apprécier. Project type: PGDipSci. [27] [28] One of the goals of the project was to use the deformed rocks from the fault zone to determine its resistance to stress. A recent slips at Havelock Creek rock types – but what was it fault! 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