Alpine Fault. The effect of fluid differentials on an Alpine Fault earthquake is obviously significant but presently unquantified. A team of experts has been tasked with creating an action plan for an Alpine Fault mega-quake, thought to be due within the next 60 years. The effects go on. The Hope Fault, which caused a magnitude 7 to 7.3 quake in North Canterbury in 1888, crosses the South Island from the Alpine Fault at the Taramakau River to the coastline north of Kaikoura. Associate Professor Tom Wilson from Canterbury University, whose specialist area is disaster risk and resilience, speaks on the impacts of an Alpine Fault q Sure the Alpine will noot be acake walk for many. The rupture will produce one of the biggest earthquakes since European settlement of New Zealand, and it will have a major impact on the lives of many people.
It is hard to imagine how spectacularly bad this would be for Wellington. The lengthy Alpine Fault, which runs along the spine of the Southern Alps, has garnered much attention as it has a clear geographic record of rupturing every 300 years or so. All these things mean that the Alpine Fault is a globally significant geological structure. The synthetic records show that ground motion accelerations in Greymouth and Hokitika are expected to exceed 20%g and 50%g respectively during an Alpine fault earthquake, while ground motions in Christchurch are expected to be moderate, with peak ground accelerations (PGAs) of 8%g expected from an Alpine event and 6%g from a Hope fault event. The Wellington Fault is an active seismic fault in the southern part of the North Island of New Zealand.It is a dextral (right-lateral) strike-slip fault with variable amounts of vertical movement causing uplift to the northwest, as expressed by a series of ranges. By Rupert Sutherland, Victoria University of Wellington An international team that drilled almost a kilometre deep into New Zealand’s Alpine Fault, which is expected to rupture in a major earthquake in the next decades, has found extremely hot temperatures and high fluid pressures. Historical Seismicity.
A big quake on the Alpine Fault could block South Island highways in more than 120 places and leave 10,000 people cut off, new research has estimated. Just as the Kaikōura earthquake in 2016 had a significant impact on Wellington, we expect that when the Alpine Fault ruptures in a large magnitude earthquake it will be widely felt across the lower North Island. The effect in Christchurch from a Magnitude 8 earthquake on the Alpine Fault would likely be similar to the Canterbury 7.1 earthquake of September 2010, but hopefully much less than the 6.3 eathquake of 22 February 2011, which was almost underneath the city and at very shallow depth. Whenever a large quake happens in the South Island, the immediate thought is either "That was Wellington, or, That was the Alpine Fault." Discussion: Alpine Fault Rupture Mechanisms. But even then, … the Alpine fault in central South Island than at any other part of the plate boundary through New Zealand [Evison, 1971; Eberhart-Phillips, 1995]. [1] The Southern Alps have been uplifted on the fault over the last 12 million years in a series of earthquakes. Evidence for Ancient Alpine Fault Earthquakes. Image / GNS Science Bear in mind an M8 easily has the potential to cause the two sides of the fault to permanently move up to 4 metres vertically and 8 metres horizontally. Evidence for Alpine Fault Creep at the Surface. The lack of moderate or large-magnitude earthquakes on the Alpine fault since reliable record keeping started means that the seismic potential of the Alpine fault must be inferred from indirect New Zealand’s Alpine Fault reveals extreme underground heat and fluid pressure May 17, 2017 4.16pm EDT Rupert Sutherland , Te Herenga Waka — Victoria University of Wellington The Alpine Fault has a high probability (estimated at 30%) of rupturing in the next 50 years. Earthquake. The 2012 paper suggests simply that fault zones are sites of high fluid pressure gradient, and that “dynamic pressurisation likely promotes earthquake slip.” Stage two of the deep-drilling programme is scheduled for 2014. An 8.5 or even greater earthquake, which is defintely possible, hardly bears thinking about. When the Alpine Fault goes, and, surmising it is a sub-8 rupture, what would the effect be on buildings and soil in Christchurch? ... We don't know exactly what effect the Kaikoura earthquake had on the Alpine Fault, but it's likely too far away to have had any significant effect. * Alpine Fault moves more than any other fault in the world * Alpine Fault spreads across South Island, researchers say * When, not if: Alpine fault could cause 8 metres of movement. In between earthquakes, the Alpine Fault is locked. Alpine Fault Dynamic Rupture Model Alpine Fault Locking Inferred from Geodetic Data. The Alpine Fault is a geological fault that runs almost the entire length of New Zealand's South Island (c. 480 km) and forms the boundary between the Pacific Plate and the Indo-Australian Plate.
Alpine Fault Unzipping. Geologists working on Project AF8 believe that the next severe earthquake on the Alpine Fault is most likely to be a rupture that begins in South Westland and “unzips” northwards and will … About 50 emergency-related organisations from across the country were introduced to Project AF8 [Alpine Fault Magnitude 8], a group set up to "collectively plan for an Alpine Fault event".
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It is hard to imagine how spectacularly bad this would be for Wellington. The lengthy Alpine Fault, which runs along the spine of the Southern Alps, has garnered much attention as it has a clear geographic record of rupturing every 300 years or so. All these things mean that the Alpine Fault is a globally significant geological structure. The synthetic records show that ground motion accelerations in Greymouth and Hokitika are expected to exceed 20%g and 50%g respectively during an Alpine fault earthquake, while ground motions in Christchurch are expected to be moderate, with peak ground accelerations (PGAs) of 8%g expected from an Alpine event and 6%g from a Hope fault event. The Wellington Fault is an active seismic fault in the southern part of the North Island of New Zealand.It is a dextral (right-lateral) strike-slip fault with variable amounts of vertical movement causing uplift to the northwest, as expressed by a series of ranges. By Rupert Sutherland, Victoria University of Wellington An international team that drilled almost a kilometre deep into New Zealand’s Alpine Fault, which is expected to rupture in a major earthquake in the next decades, has found extremely hot temperatures and high fluid pressures. Historical Seismicity.
A big quake on the Alpine Fault could block South Island highways in more than 120 places and leave 10,000 people cut off, new research has estimated. Just as the Kaikōura earthquake in 2016 had a significant impact on Wellington, we expect that when the Alpine Fault ruptures in a large magnitude earthquake it will be widely felt across the lower North Island. The effect in Christchurch from a Magnitude 8 earthquake on the Alpine Fault would likely be similar to the Canterbury 7.1 earthquake of September 2010, but hopefully much less than the 6.3 eathquake of 22 February 2011, which was almost underneath the city and at very shallow depth. Whenever a large quake happens in the South Island, the immediate thought is either "That was Wellington, or, That was the Alpine Fault." Discussion: Alpine Fault Rupture Mechanisms. But even then, … the Alpine fault in central South Island than at any other part of the plate boundary through New Zealand [Evison, 1971; Eberhart-Phillips, 1995]. [1] The Southern Alps have been uplifted on the fault over the last 12 million years in a series of earthquakes. Evidence for Ancient Alpine Fault Earthquakes. Image / GNS Science Bear in mind an M8 easily has the potential to cause the two sides of the fault to permanently move up to 4 metres vertically and 8 metres horizontally. Evidence for Alpine Fault Creep at the Surface. The lack of moderate or large-magnitude earthquakes on the Alpine fault since reliable record keeping started means that the seismic potential of the Alpine fault must be inferred from indirect New Zealand’s Alpine Fault reveals extreme underground heat and fluid pressure May 17, 2017 4.16pm EDT Rupert Sutherland , Te Herenga Waka — Victoria University of Wellington The Alpine Fault has a high probability (estimated at 30%) of rupturing in the next 50 years. Earthquake. The 2012 paper suggests simply that fault zones are sites of high fluid pressure gradient, and that “dynamic pressurisation likely promotes earthquake slip.” Stage two of the deep-drilling programme is scheduled for 2014. An 8.5 or even greater earthquake, which is defintely possible, hardly bears thinking about. When the Alpine Fault goes, and, surmising it is a sub-8 rupture, what would the effect be on buildings and soil in Christchurch? ... We don't know exactly what effect the Kaikoura earthquake had on the Alpine Fault, but it's likely too far away to have had any significant effect. * Alpine Fault moves more than any other fault in the world * Alpine Fault spreads across South Island, researchers say * When, not if: Alpine fault could cause 8 metres of movement. In between earthquakes, the Alpine Fault is locked. Alpine Fault Dynamic Rupture Model Alpine Fault Locking Inferred from Geodetic Data. The Alpine Fault is a geological fault that runs almost the entire length of New Zealand's South Island (c. 480 km) and forms the boundary between the Pacific Plate and the Indo-Australian Plate.
Alpine Fault Unzipping. Geologists working on Project AF8 believe that the next severe earthquake on the Alpine Fault is most likely to be a rupture that begins in South Westland and “unzips” northwards and will … About 50 emergency-related organisations from across the country were introduced to Project AF8 [Alpine Fault Magnitude 8], a group set up to "collectively plan for an Alpine Fault event".
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