New Zealand new earthquake fault ‘similar to Alpine’ fault

August 2, 2013NEW ZEALANDAn Otago geologist’s draft manuscript suggests there’s a tectonic fault system off the South Island’s east coast potentially comparable in size to the Alpine Fault. University of Otago geologist Phil Ford has privately written a draft proposal, as yet unpublished, and detailing the possibility of the major South Island intra-plate fault, with possible seismic and tsunami hazard implications. His draft uses previous research that identified beach deposits on the coast east of Milton as potential evidence of tsunami relating to the Akatore fault, or another, hitherto unidentified, offshore system. Proposing to name it as the Indiania Fault System (IFS), he says it appears to run for most of the offshore length of the South Island, similar in size to the Alpine Fault. Using New Zealand Institute of Water and Atmospheric Research bathymetric charts, some portions of a fault parallel with the coast were apparent, the paper says. “It is immediately apparent that portions of the suggested system must be covered by South Island river run-off sediment, at least in places, just as the active and earthquake-related fault in the Christchurch area is covered in gravels and other… sediments onshore.” East of Canterbury and Otago the seafloor feature runs south off southeast Southland and down towards northwest of the Auckland Islands. “A strike length of greater than 1000km is clear, more than comparable with the Alpine Fault at about 800km south-southwest of the South Island. Both the southern IFS elements and southern Alpine Fault offshore continuations are clear and readily visible on seafloor bathymetry displays.”
He said the potential of that suggested system warranted immediate research and if shown to be an active fault system then the scale must be “very significant” given a potential overall length of 1600km. “If the proposed system is accepted by the New Zealand geological fraternity then early notice of serious tsunami vulnerability needs to be passed to governing authorities and civil defense organizations.” GNS Science engineering geologist David Barrell said he was not aware of the proposal but scientists recognized a system of faults off the southeast coast. The faults, many apparently inactive or remnants of geological activity from the formation of New Zealand, were parallel to the coast and associated with, for example, the Great South Basin or the Waipounamu fault zone. “It’s a fault system that has a history that starts back not long after New Zealand parted company from Australia and Antarctica more than 100 million years ago. It’s got more of the appearance of a fossil fault rather than anything we would regard as major relating to the present tectonic setting of New Zealand.” Unpublished manuscripts needed peer review and publication in a reputable journal before being accepted as official, he said. University of Otago geophysicist Dr Andrew Gorman said he would want much more data before making such an assertion and there were other theories. “I still think the major worry in Otago and Southland is the Alpine Fault itself, and also from the sorts of smaller faults through the South Island.” –Stuff
Six quakes rattle NZ: A flurry of six earthquakes have struck the country overnight, with the strongest, a magnitude 4.9, hitting off Seddon. The 4.9 magnitude quake, which struck just before 1am, was centered 25 km south-east of Seddon at a depth of 22km. It was followed by several smaller aftershocks, the biggest of which was a magnitude 4.5 quake 30 km east of Seddon at 6.38 am. GeoNet had reported a magnitude 4.5 quake 15 km northwest of Christchurch at 4.12 am, but this has since been removed. –Stuff
This entry was posted in Civilizations unraveling, Earth Changes, Earth Watch, Earthquake Omens?, High-risk potential hazard zone, Infrastructure collapse, Land fissures, cracks, sinkholes, Lithosphere collapse & fisssure, Potential Earthchange hotspot, Seismic tremors, Signs of Magnetic Field weakening, Tectonic plate movement, Time - Event Acceleration, Volcano Watch. Bookmark the permalink.

4 Responses to New Zealand new earthquake fault ‘similar to Alpine’ fault

  1. It seems the earth is uneasy yet again around the world…

    Thank you so much for all your informative posts… Sue Dreamwalker

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  2. Irene C says:

    God says that He will create a new heaven and new earth. For anyone who has ever given birth, there is a lot of pain prior to the new wonder. In my opinion, these birth pains are coming faster than before. My prayer is that everyone will be ready. Maranatha

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  3. Louise Page says:

    The discovery of new fault lines is exactly what I have referred to as to be going to happen (blog)(also the finding of undersea volcanoes – some in Norway) . With each new large quake event and observation of some tremors/quakes happening away from known faults, that accumulation of new knowledge such as the discovery of new fault lines will continue.
    There is so much in ‘nature’ yet to be discovered and some of it may not be very friendly unfortunately. But, some new info may be very important for we humans to plan our lives and future around. I, for one, am not surprised by these continual findings.

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  4. peter payne says:

    i agree. two weeks intense shallow quakes numbering 2oooplus and counting is youthful in planetary terms but deeply concerning in new zealand human terms. A 1800km faultline makes the transalpine one a baby at mere 800.I am grateful to friends across the world Brian Andrew Dunn Susen Seguna and Twiglet Hecate for watching this activity. I predict at least six more M5 quakes in the near future at Seddon Cook Strait. i hope i am wrong. pete NZ

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