Abstract Tectonic weakening of bedrock along the Alpine Fault Zone (AFZ) in South Westland and northern Fiordland, New Zealand, has favoured erosion of schist‐derived mylonite and cataclasite by a variety of slope failures. 2017 is the 300th anniversary of the last major rupture on the 850-km long Alpine Fault. The Southern Alps have been uplifted over 20 kilometres over 12 million years but erosion has kept their height below 4,000 metres. You can pick out the line of the Alpine Fault on this satellite image of the South Island. In the North. The seismicity rate of the Alpine fault is low but comparable to locked sections of the San Andreas fault, with large earthquakes expected. A project set to drill 1.3 kilometres into the Alpine Fault has been called off 400 metres shy of its goal. The Alpine Fault is believed to align with the Macquarie Fault Zone in the Puysegur Trench off the southwestern corner of the South Island. By Alice Lake-Hammond. 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. Filter. Whataroa Tourism; Whataroa Accommodation; Whataroa Bed and Breakfast; Whataroa Holiday Rentals; Whataroa Holiday Packages; Whataroa Flights; Whataroa Restaurants How often does the Alpine Fault rupture? The scenarios were designed and developed as part of Project AF8, or Alpine Fault Magnitude 8, a partnership of all the Emergency Management Groups in the South Island. “Hands on Alpine Fault learnings plus a bush short walk in Whataroa ... Read reviews in English Go back. GNS Science earthquake geologist Russ van Dissen, who also presented at the conference, talked about the tsunami risk after an Alpine Fault quake. - Check out Tripadvisor members' 349 candid photos and videos of Alpine Fault Tours "What it [the figures] also tells us is that these events have been popping off through time and there's really no reason for them to stop happening.". Earthquakes along the fault have formed the Southern Alps . The Alpine Fault is called a strike slip or transform fault. The Alpine Fault. . From there, the Alpine Fault runs along the western edge of the Southern Alps, before splitting into a set of smaller dextral strike-slip faults north of Arthur’s Pass, known as the Marlborough Fault System. The last Alpine Fault quake, which occurred in 1717, measured an approximate magnitude 8.1 - making it about three times stronger than the Kaikoura quake of 2016. The Alpine Fault runs for about 600km up the spine of the South Island, and is one of the world’s major geological features. Although the Alpine Fault seems so obvious today, but it was not recognised until 1941 by two … The length of the rupture will be … This fault has ruptured four times in the past 900 years, each time producing an earthquake of about magnitude 8. Each time it has ruptured, it has also moved vertically, lifting the Southern Alps in the process. Alpine Fault movement. 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. The Otago University study said a 200m wide 'fault avoidance zone' should be created to prevent further development in the area. Date of experience: November 2020. The 2004 Boxing Day tsunami and the 2011 liquefaction of buildings in Christchurch were two past examples of secondary hazards, she said. Work during the 1990s has established that the Alpine Fault is a major source of potential seismic hazard and incorporation of data from the fault into seismic hazard maps has greatly changed the perception of earthquake hazard in the South Island. "It was scientifically credible, but also it provided probably the most significant test for Civil Defence around the South Island," Orchiston said. "The Alpine Fault is a spectacular fault, it's more than 800 kilometres long at its full extent," Orchiston said. We've known about the Alpine Fault for around 80 years. Regardless of the epicentre, Marlborough was looking at an intensity 6 or 7 earthquake on the Mercalli scale when the Alpine Fault finally gave. The Alpine Fault quickly became accepted as a notable feature of the geology of New Zealand, and by 1948 was included on standard geological maps. There were 4 of us on this tour and all enjoyed learning more about the geology of such an impressive landscape. Motion on the fault is in a direction that plunges approximately 22°, indicating that the fault in … One major geographic feature of the South Island of New Zealand is the Southern Alps, a mountain range caused by tectonic uplift along the Alpine Fault. The Southern Alps have been uplifted on the fault over the last 12 million years in a series of earthquakes. Awesome experience. The glaciers and rivers have removed the rest of the material and spread it out across the lowland plains or onto the sea floor. From there, the Alpine Fault runs along the western edge of the Southern Alps, before splitting into a set of smaller dextral strike-slip faults north of Arthur's Pass , known as the Marlborough Fault System . From there, the Alpine Fault runs along the western edge of the Southern Alps, before splitting into a set of smaller dextral strike-slip faults north of Arthur’s Pass, known as the Marlborough Fault System. Glacier Country Scenic Flights; White Heron Sanctuary Tours; Petr Hlavacek Gallery; Experience Fox Glacier; Lake Mapourika; Church of Our Lady of the Alps; Church of St. James; Hukawai Lodge; Hukawai Art Gallery; Tours in Whataroa. Forming the western edge of the Southern Alps, it is clearly visible from space. Alpine Fault Tours Exposed, Whataroa: See 24 reviews, articles, and 43 photos of Alpine Fault Tours Exposed, ranked No.3 on Tripadvisor among 4 attractions in Whataroa. Less certain is where the megaquake will hit, but the most likely is a south-to-north quake centred at Milford Sound, with intensity-7, 6 and 5 quakes rippling up the South Island. The Darfield earthquake had a magnitude of M7.1. During the Eo‐Oligocene, extensional oblique‐slip (transtension) on these fault systems led to the subsidence and final submergence of Fiordland. Boat Tours in Whataroa; Bus Tours in Whataroa; Walking Tours in Whataroa The massive Alpine Fault is due for another big earthquake and scientists have been drawing up a scenario of what the devastation would look like. Earthquake epicentres indicate that the arc defines the position of the fault just off Fiordland's outer coast and then to near the north end of Puysegur Trench at 46.9° S, 165.25° E. Along the fault vertically to a depth of 10 km the Fiordland rocks are 0.6 Mg/m 3 denser than those to the northwest. The team developed its co-ordinated response discussions around a south-to-north earthquake as it was most likely, she said. 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. From there, the Alpine Fault runs along the western edge of the Southern Alps, then splits into three parallel faults north of Arthur's Pass , merging into the Kermadec-Tonga Subduction Zone in the Hikurangi Trench off the coast of the North Island. 8.2b). Helpful. PO Box 13 678, There is no way of predicting exactly when an earthquake will occur. A number of outstanding problems remain in regard to the Alpine Fault, two of which are: As with many natural systems, there was a spread of intervals with the longest being about 510 years and the shortest about 140 years. Scroll down to discover how! Although the Alpine Fault seems so obvious today, but it was not recognised until 1941 by … This is based on how regularly it has ruptured in the past. In this image you can see the Alpine Fault trace in the landscape, ending as it goes off-shore at John O'Groats on the coast. Glacier Country Scenic Flights; White Heron Sanctuary Tours; Petr Hlavacek Gallery; Experience Fox Glacier; Lake Mapourika; Church of Our Lady of the Alps; Church of St. James; Hukawai Lodge; Hukawai Art Gallery; Tours in Whataroa. 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. In Newsletter, Response Planning. 0. Milford Sound is the most likely epicentre for a magnitude-8 earthquake on the Alpine Fault. How often does the Alpine Fault rupture? Even the trees that have survived an earthquake will bear the scars of the shaking, in the form of periods of poor growth recorded in their rings. These include the Clarence, Awatere and Hope Faults, all of which take some of the seismic load off the northern part of the Alpine Fault and transfer it through Marlborough. The Alpine Fault is where two great tectonic plates (the Pacific and Australian) plates collide. It has ruptured four times in the last 900 years, resulting in earthquakes of around magnitude 8, and is now considered highly probable to go again in the next 50 years. 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. The other options are a north-to-south tear starting in Greymouth and heading southwest, or an epicentre near Fox Glacier, heading up and down the fault. This year has continued our recent run of declared states of emergency around the country with what will be the largest All of Government response seen in New Zealand probably since the last world … Boat Tours in Whataroa; Bus Tours in Whataroa; Walking Tours in Whataroa Read more. 32 11. Camp Glenorchy project manager Steve Hewland talks about the resilience factors of the newly-built camping ground near Queenstown. The Alpine Fault splits the South Island in two, and forms the abrupt western edge of the Southern Alps. Scientists believe the Alpine Fault has a high probability (estimated at 30%) of rupturing in the next 50 years. Most New Zealanders alive today will still be alive when the Alpine Fault rips in a magnitude-8 earthquake, leading scientists say. The trenches, each of about 20m-long will allow the geologists to take photos and make detailed drawings of the recently deposited strata to a depth of 2m. The alpine fault earthquake will alter tectonic stress distribution, and other faultlines may rupture in the days or years following it. "The tsunami, in the Alpine Fault case, might be [caused by] submarine landslides being generated off the West Coast, and it will impact the West Coast. The fault mover 30mm a year! A south-to-north earthquake is most likely along the South Island's Alpine Fault. Reviewed 17 December 2016 via mobile . Elizabeth, our tour guide, was very knowledgeable and enthusiastic showing off this area of NZ and explaining how the tectonic plates work. Alpine Fault Tours, Whataroa Picture: Touching the Alpine Fault! "When we think of earthquakes, our mind goes straight to shaking, straight to the panic we feel when the ground moves," Orchiston said. The alpine fault is located in New Zeland. South Island and those that are Cl1!t off to the north-west by the Alpine Fault at the south end of the island. Things to do near Alpine Fault Tours. Image: LEARNZ. The Alpine Fault marks the boundary of the Pacific and Australian Plates. The Alpine Fault runs for about 600km up the spine of the South Island, and is one of the world’s major geological features. 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 … Alpine Fault Tours Exposed, Whataroa: See 24 reviews, articles, and 43 photos of Alpine Fault Tours Exposed, ranked No.3 on Tripadvisor among 4 attractions in Whataroa. Image: NASA. But most dangers would not appear until after the Alpine Fault earthquake, Orchiston said. The Alpine Fault was inferred to continue south-west from Lake McKerrow along the northern Fiord-land Coast (see also Grindley, 1958). This fault has ruptured four times in the past 900 years, each time producing an earthquake of about magnitude 8. 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. The Alpine Fault is believed to align with the Macquarie Fault Zone in the Puysegur Trench off the southwestern corner of the South Island. 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