Quake tremors felt at Pitt St, Dunedin

Updated post
Mon, 12 Dec 2016 at 12:20 a.m.

█ Civil Defence Information
The first port of call is the otagocdem.govt.nz website.

2016-11-19-00-01-26[screenshot] GeoNet NZ

Severe M6.6 Earthquake
15 km SE of Hanmer Springs
A magnitude 6.6 earthquake occurred 15 km SE of Hanmer Springs, New Zealand at Mon Nov 14 2016 12:02 AM (NZDT) …

What to do after an earthquake
Expect aftershocks for hours, days, or weeks after the main quake. Aftershocks can cause building damage and falling debris that could injure you.

9 mins ago · Sources: GNS Science (GeoNet), getthru.govt.nz Google Link

geonet-nz-screenshot-14-11-16-at-12-26-pm[screenshot – click to enlarge] GeoNet NZ

█ Check out other Canterbury quakes felt after midnight at this page:
https://www.geonet.org.nz/quakes/region/canterbury

█ Christchurch Quake Map [go to Monday 14/11/16 (3) – last 3 hours]
http://www.christchurchquakemap.co.nz/all

quake-maps-3-quakes-post-12am-14-11-16[screenshots – click to enlarge]

Posted by Elizabeth Kerr

This post is offered in the public interest.

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38 Comments

Filed under #eqnz, Dunedin, Events, Geography, New Zealand, Public interest

38 responses to “Quake tremors felt at Pitt St, Dunedin

  1. Joy McMiken

    Woken from sleep. Walls creaking and general tremble.

    • Elizabeth

      Yep. Same here walls creaking (URM building), with indoor plants and pendant lights moving. For about 3 minutes. Reported to GeoNet.

  2. Gurglars

    Evacuated to Taiaroa Head, A few evacuated, but many staying at home. Not smart, better to be safe than glugging later.

  3. Elizabeth

    Mon, 14 Nov 2016
    ODT: PM confirms two dead after 7.5 quake
    New Zealand Prime Minister John Key has confirmed two people have been killed in this morning’s powerful earthquake. The 7.5 magnitude quake happened at 12.02am in North Canterbury and was followed by a series of other quakes and aftershocks. It was felt throughout New Zealand and triggered a tsunami alert down the length of the east coast, sending thousands of people fleeing for higher ground. “We don’t have any indications at the moment to believe it will rise, but we can’t rule that out,” Mr Key told reporters in Wellington, adding that details of the casualties were still being confirmed. Cont/

  4. Elizabeth

    Mon, 14 Nov 2016
    ODT: Dunedin state of emergency lifted
    Dunedin Civil Defence has lifted the state of emergency issued in response to a tsunami threat, but people should remain vigilant and stay off beaches. The emergency declaration followed today’s powerful 7.5 magnitude earthquake in North Canterbury at 12.02am felt throughout New Zealand. Dunedin Civil Defence Emergency Management (CDEM) now advised that the main tsunami threat had now passed. Cont/

    All people should continue to:

    1. Stay out of the water (sea, rivers and estuaries, including boating activities)
    2. Stay off beaches and shore areas
    3. Do not go sightseeing
    4. Share this information with family, neighbours and friends
    5. Listen to the radio and/or TV for updates
    6. Follow instructions of local civil defence authorities.

  5. Elizabeth

    Best coverage by The Press:

    Earthquake: Deaths, major damage after severe 7.5 quake hits Hanmer Springs, tsunami warning issued

    Go to http://www.stuff.co.nz/national/86416268/severe-66-earthquake-hits-hamner-springs-felt-as-far-away-as-auckland

  6. Elizabeth
  7. Elizabeth

    MSN: 7.5 magnitude earthquake: In pictures (33 slides)

    RNZ Published on Nov 14, 2016
    Earthquake: updated press conference – John Key and Gerry Brownlee
    Gerry Brownlee, Acting Civil Defence Minister and Bill Fry from GNS speak to media in the bunker at parliament.

    RNZ Published on Nov 14, 2016
    Earthquake: Press conference – Gerry Brownlee
    Gerry Brownlee, Acting Civil Defence Minister and Bill Fry from GNS speak to media in the bunker at parliament.

  8. Elizabeth

    via Stuff.co.nz

    Last updated 09:12, Nov 14 2016
    Dominion: 7.5 magnitude earthquake: what you need to know in the Capital
    Wellington was woken shortly after midnight when a powerful 7.5 magnitude quake hit in North Canterbury. You can follow live quake coverage here. Below is the key information for the Wellington region:

    Stay home – Wellington City Council is doing safety checks in the CBD. Absolutely no access to BNZ’s Harbour Quays building and TSB Arena.

    Transport – Damage to ferry terminal, so no ferries. Also, no trains as tracks are inspected. East By West ferry cancelled till further notice. Most bus services running as normal. Airport open as normal.

    READ MORE: 
    * Live quake coverage
    Severe 7.5 quake in North Canterbury
    * Video: scenes of chaos  
    Photos: Huge earthquake shocks New Zealand 
    Earthquake jolts NZ: What you need to know
    Earthquake: Report of fatality in Canterbury 
    Students told to stay at home after quake 
    Tsunami sirens sound across the country  
    Tracing the source of the big earthquake 

    Power – Few outages which should be restored soon. People without power should hopefully get it back on by mid to late morning.

    Water – Remains safe to drink but residents are advised to boil as a precaution and start stockpiling.

    Education – No blanket school closures but most are closed and some exams cancelled, so check with your schools. Massey and Victoria universities are closed.

    Stay in touch – Advice is to listen to the Civil Defence messages on radio and TV, and if you have a medical emergency, please call 111.

    Damage control – City Council says it needs to check hundreds of buildings. Stay away from CBD if at all possible.

    Tsunami threat – Largely over for Wellington, but warnings remain for part of the East Coast. Strong currents may be present.

    Weather – The capital can expect winds of up to 140kmh. King tides are likely given the week’s ‘supermoon’.

    NZ Post – There are no courier deliveries to businesses in the CBD, the airport, Island Bay or Petone.

    Stuff Link + Photos/Videos

  9. Hype O'Thermia

    How does the Compass food get here?

    “Trucking company Halls Group said freight was largely at a standstill in the South Island and the lower North Island.
    “Until we get roads we can’t move. Who knows what lies ahead. It’s very fluid. It’s impossible to answer questions until we know what road links can be used,” Halls South Island operations manager Bob Gairdner said.
    Road Transport Forum chief executive Ken Shirley said there will be severe disruption to freight as many freight companies had halted their southern-destined trucks at Palmerston North.
    “With the main Kaikoura route down and the inland Kaikoura route down, plus the problems with Lewis Pass there’s not a lot of freight getting through.”
    Interisland ferry freight operations out of Wellington had also been halted but the road option south wouldn’t be available anyway, Shirley said.
    Roading authorities are working to repair enough of the inland Kaikoura route to restore some vehicle access, as well as provide a Lewis Pass alternative.
    KiwiRail’s network along the Kaikoura coast is in tatters.
    “The weeks ahead are a worry. Logistics these days is governed by the just-in-time ethos,” Shirley said.
    “For a lot of these fast moving consumer goods, a couple of days will mean there will be shortages.
    “There are a myriad of specialised products and basic food items. Everything you can think of is moved on a truck.
    “It just highlights how dependent we are on the movement of freight.”
    In addition to the slips and road blockages, the biggest 50MAX nine axle trucks are restricted on some of the diversion routes available partly because of the size of bridges and culverts and wear and tear on them.

    from http://www.stuff.co.nz/business/86429807/trucking-companies-at-a-standstill

    • Elizabeth

      The supply chain rupture is another challenge for Compass in what has been a difficult first year of its 15-year outsourcing deal with SDHB.

      Sat, 19 Nov 2016
      ODT: Compass meals could be flown if need arises
      It will be meals on wings, rather than wheels, if the Compass Group starts flying food to the South Island after the rupture of its supply chain. The company has confirmed it is using the Lewis Pass, rail and shipping to keep the Southern District Health Board’s food service going after Monday’s devastating quake in North Canterbury that has cut off Kaikoura and part of State Highway 1. Compass will fly meals around the country if that becomes necessary. Cont/

      ****

      So much for Richard Thomson Greater-Dunedin-learned ‘economy and resilience’ – there’s no money being saved anywhere – especially since he does not understand food miles —or the potential for natural disaster.

      Personally, I don’t know anyone stupid enough to trust Thomson, Crombie and Grant, not with our health system and not with bulk food delivery. As it turns out, NEVER trust them with our electricity network companies.

      These three have the DCC and SDHB synthetically joined at the hip. Follow the money.

      Our ‘saviours’ will never be people who trough.

  10. Calvin Oaten

    Don’t go into the hospital for a lengthy stay as you might just starve to death. Now we’ll see how Richard Thomson and his team handle it all. Might be that he will wish for a wand to wave and reinstall the previous system regardless of its perceived shortcomings.

    • Elizabeth

      Very hopeful Calvin, in a good way! Even better sack Grant, Crombie and Thomson – for wasting our time and reducing our vitamin intake, with the taste and appearance of mono-coloured slop.

  11. Gurglars

    The Demise of the Compass contract? Or are Compass airfreighting meals?

  12. Elizabeth

    Monday, 14 November 2016
    ODT: Sharp aftershocks follow deadly quake
    A cluster of sharp aftershocks rattled people around the country on Monday evening, including three “severe” quakes near Seddon and another near Kaikoura – the largest a magnitude 5.8. […] Thousands from as far south as Canterbury and as far north as Auckland have reported feeling the sharp jolts. […] Help arrived yesterday afternoon  for Kaikoura residents and travellers hit hard by the deadly  7.5 event, which GeoNet now considers two separate earthquakes, with military choppers ferrying people and resources to the town. Cont/

    ****

    [TV3] newshub.co.nz Mon, 14 Nov 2016 at 4:24 p.m.
    Kaikoura quake damage worse than thought – John Key
    By Jenna Lynch
    The Prime Minister says the damage to the Kaikoura region from Monday’s magnitude 7.5 earthquake is worse than he thought. Massive slips could be seen as he flew over in a Defence Force NH90. “It’s just utter devastation, I just don’t know – that’s months of work,” John Key told Earthquake Minister Gerry Brownlee, Labour leader Andrew Little and pilots. […] Mr Key and Mr Brownlee estimated the cost of the clean-up will run into the hundreds of millions of dollars, and clearing the debris and blocked roads could take months. […] A number of NH90s are preparing to take in tonnes of food, water and other supplies tomorrow. […] There are 1200 tourists are stranded in Kaikoura. The Government is looking at options to try and help them get out.

    Gerry Brownlee prepares disaster response
    HMNZS Canterbury will support the ongoing response in the Kaikoura region, which has been hardest-hit by the earthquake. Acting Civil Defence Minister Gerry Brownlee says viewing the region from the air revealed extensive damage to essential connections and basic infrastructure.
    “The Prime Minister and I have now seen first-hand the numerous major slips, which have isolated Kaikoura from the north and south,” Mr Brownlee says. Our immediate priority is ensuring delivery of clean water, food and other essentials to the residents of Kaikoura and the estimated 1000 tourists in the town. The New Zealand Defence Force has been tasked with delivering the essential items Civil Defence is asking for – first by NH90 helicopters, which have already made a number of runs, and also on board the Canterbury. The economic impact on earthquake-affected areas will also be assessed in the coming days. Any suggestions the Earthquake Commission will be financially stretched in meetings its obligations are ill-founded. EQC is guaranteed by the Crown. Agencies will continue monitoring the situation closely. The public should be advised that aftershocks will continue to occur. It’s important that people look out for each other.”
    Newshub

  13. Elizabeth

    Update Fri 18 Nov 2016 – the largest quake on Monday has been upgraded by GNS scientists to magnitude 7.8

    Mon, 14 Nov 2016 at 2:09 p.m.
    Newshub: The biggest quakes in NZ’s history

    The 7.5 magnitude earthquake which struck near Culverden early on Monday was a significant jolt, but where did it put its mark in the history books? In terms of magnitude, Monday’s quake is far larger than the 6.3 Canterbury earthquake in February 2011 which killed 185 people, but is by no means the biggest our shaky isles have experienced. Cont/

    new-zealands-great-quakes-via-geonet-dnzgreatquakesswo1411_darfield_2

  14. Elizabeth

    Mon, 14 Nov 2016
    ODT: Scientists intrigued by twin quakes
    International scientists are intrigued at the complexity of the suspected twin quakes that rattled New Zealand early on Monday.
    Professor of Geosciences Kevin Furlong, of Pennsylvania State University in the US, said what GeoNet now considers two separate earthquakes, striking at Culverden just after midnight with a magnitude of 7.5, showed evidence of “complex rupture history”. The area where the quakes appeared, near the boundary of the Pacific and Australian tectonic plates, contained numerous faults with a wide range of orientations, Prof Furlong noted. “The main rupture and aftershocks may exploit this complicated tectonic zone resulting in a range of earthquake mechanisms for the aftershocks and in comparison to the main earthquake.”
    Dr Mark Quigley, formerly based at Canterbury University and now at the University of Melbourne, also commented on the quakes’ dynamic characteristics. “Preliminary data suggest that this is a structurally complicated earthquake, involving a mixture of reverse faults that thrust the northern South Island up over the Pacific Plate, and strike-slip faults, which slid northern crustal blocks sideways and towards the northeast relative to their southern counterparts,” Quigley said. Cont/

  15. Rob Hamlin

    It’s truly an ill wind that blows nobody any good. As the pressure goes on Kaikoura it comes off other previously sweaty local individuals and organisations eh? Said parties are probably right now doing a very good impression of a group of crabs digging themselves back into the sand.

  16. Calvin Oaten

    Are you suggesting Rob, that someone set off the earthquakes as a diversionary tactic. I doubt that there is the capability to do that, even as they shut down most other things that they touch. Still, Dave Cull has a very persuasive manner.

  17. Hype O'Thermia

    Dave Cull is a mover and shaker, passionate about transparency and 10,000 new jobs
    – ahh, make that 1000……..

    100?

    Cycleways and vanity projects! 10 at least!

  18. Rob Hamlin

    No Calvin, I do not think that earthquakes are in their gift, but the consequences stemming from them most certainly are. When the ooze underneath the Stadium was investigated it was found to be a mixture of hydraulically deposited mud and lenses of rocks. The numerous rock lenses were largely the outcome of earthquake induced landslides being washed out into the harbour by the Leith – so we do get big earthquakes here.

    Were we to get a jolt, what would happen to Dave’s drains and Grady’s poles and transformers and those around them? Not to mention the Stadium itself, which is, you may recall built on piles driven (as required!!!) into this earthquake-evident ooze, with no foundation (maybe inspired by the ‘bottomless’ St Clair Esplanade – or was it vise-versa?).

    The Stadium underpinnings were termed at the time as ‘friction’ piles, but as almost total liquifaction is the inevitable outcome when this harbour ooze is given a firm smack from below by the underlying basalt basin, there ain’t likely to be any friction at that moment. Without friction, the ‘r’ disappears and friction piles become fiction piles. At which point the large passive and transient loads imposed on the two stands by the roof – sensibly cantilevered as it is well out beyond the actual footprints of both North and South stands – will take over.

    It is perhaps interesting to note that, while it was the Victorian structures that got the stick and the wreckers ball in Christchurch, while most of the corpses were in more recent buildings. Likewise, it appears that the major casualty in Wellington this time round is Statistics House, a large modern building of what looks like some six stories. Apparently one of these six stories has ‘pancaked’, which sounds like an internal structural rather than a ground issue, and does not sound like a survivable event for any occupants of said floor – had they been there. Luckily as it was midnight, they weren’t. This square building apparently houses 500 people, so you can do a fag packet calculation as to what the casualties might have been had this quake happened in working hours.

    We now know that a considerable proportion of the concrete reinforcing steel recently supplied in this country is largely of ‘Weetbix’ tensile capacity. It would be interesting to know how many of the steel fittings that hold all the massive reinforced concrete slab walls of these now popular large ’tilt slab’ buildings upright and together are also made of the same stuff, and what the consequences for occupants and bystanders might be if they are.

    • Peter

      Rob. What a beautiful picture you paint re stadium and earthquakes. A truly awesome piece of wreckage, a testimony to stupidity and a soothing balm to aggrieved folk who hate corruption.

    • Hype O'Thermia

      http://www.stuff.co.nz/national/86497605/concerns-over-building-stability-in-central-wellington
      Seems like 2 buildings, the Stats “pancaking” one and this one which seems from the article to be Red Cross HQ* as well as having residential tenants.
      Both modern, not “heritage” buildings. Funny the way authorities have been all over our heritage buildings to the extent that owners demolished, or if not allowed to, went in for demolition by decay. And yet with moderate maintenance they seem to survive pretty well.

      Perhaps the authorities need to focus their safety glasses onto newer buildings.

      Radio news – Red Cross is in a neighbouring building, among some that have been evacuated because of the danger of the 10-storey one collapsing.

  19. Calvin Oaten

    Phew???!!! You don’t half paint a picture Rob. Fair enough too. The Stadium is literally floating as you suggest. Why? because there is no base under it, just stuff from ages and ages past. It is known that a solid basalt base is there but many many metres deep. Untouchable by any type of construction at $250m can be. Beyond the $250m (much greater than the ‘not a penny more’ than $188m) the Stadium would not have been built, end of story.

  20. Elizabeth

    Tue, 15 Nov 2016
    ODT: Concerns raised over evacuations
    It was a long night for the hundreds of Otago residents evacuated following tsunami warnings after yesterday’s massive earthquake. Those involved said the civil defence response ran smoothly, but there was also criticism that information about the tsunami risk was too slow to reach some people in the region. Cont/

  21. Elizabeth

    Wed, 16 Nov 2016
    ODT: Otago doing its bit for recovery
    Otago Civil Defence and Emergency Management Group regional manager Chris Hawker has headed to Canterbury to help with Civil Defence operations there after Monday’s magnitude-7.5 quake. […] The Otago Civil Defence and Emergency Management Group (CDEM) was responding to a request for help after the quake, near Hanmer Springs. Cont/

    ****

    Related Post and Comments:
    9.3.11 Dunedin earthquake proneness

    █ For more, enter the term *earthquake* in the search box at right.

  22. Elizabeth

    Wed, 16 Nov 2016
    ODT: Residents urged to learn from quake
    Queenstown residents would probably face a similar scenario to the one in Kaikoura should the Alpine Fault rupture, and they could be cut off by landslips for weeks. […] Emergency management officer for the Queenstown Lakes and Central Otago districts Trevor Andrews said the Wakatipu Basin was similar to Kaikoura in relying heavily on tourism, and its transport network was also particularly vulnerable to a major earthquake. Cont/

  23. Elizabeth

    At a glance (via ODT)
    • Transport costs will rise by up to 10.5%
    • Consumers will feel brunt of price rises
    • Tourism operators already experiencing cancellations
    • Road safety will become a major problem

    Fri, 18 Nov 2016
    ODT: Costs, cancellations among difficulties ahead
    Otago Chamber of Commerce chief executive Dougal McGowan is warning that tourism operators and businesses in the region are likely to face difficulties in the wake of the Kaikoura earthquake. […] Mr McGowan also questioned how prepared businesses were for another earthquake after the major quakes in Christchurch. His initial impressions were they had not prepared well and he hoped the quakes this week would spark them into action. Cont/
     

  24. Elizabeth

    Tweets (click on photos to enlarge):

  25. Elizabeth

    A very welcome editorial in summary.

    Sat, 19 Nov 2016
    ODT: Sheer magnitude of the issues
    OPINION Sometimes the full force of news strikes at once. And given the tendency of news organisations to look for drama, what at first sight is portrayed as potentially catastrophic on occasions turns out to be less than the real deal. Sometimes, however, it takes time for the full impact of a natural disaster or large complex announcements to be revealed. Such is  the case with Monday’s 7.8-magnitude earthquake. Given its complexity, it even had to be upgraded from 7.5 after a few days, as earth scientists examined it more closely. As each day passes, more emerges about the destruction and aftermath. This is the same pattern as with the two big Christchurch quakes. As weeks turned to months and then years, the breadth and depth of the damage became apparent, and the extent and length of the restoration stretched out. There must be similar fears for North Canterbury and Marlborough.

    Already, there is speculation the main truck railway line and the main highway might never be resurrected. Already, there are severe concerns about the future of Kaikoura. Already, there are worries about the short- and long-term effect on tourism.

    Meanwhile, the state of buildings in Wellington, particularly on the reclaimed waterfront, is proving to be shocking. More are deemed unsafe each day. Serious questions definitely need to be asked about how beams separated from floors in the relatively new Statistics building, and how so many others are unsound. What happens, then, when the big one strikes Wellington itself? How fortunate this quake was just after midnight on Monday when the central city was deserted and at low tide. How much more damage will be revealed in Wellington and at CentrePort in the coming weeks? Surely, there are lessons here, and from Christchurch, about the importance of decentralisation of  services and administration. All the Government’s eggs should not be in that shaky basket that is downtown Wellington. Cont/

  26. Elizabeth

    Sun, 27 Nov 2016 [via The Star]
    ODT: Impact highlights need to be prepared
    As the “whole-of-country response” continues in the wake of the 7.8 magnitude earthquake on November 14, Civil Defence Dunedin emergency management officer Glenn Mitchell is urging people to be prepared. […] The impact of the earthquake near Kaikoura had helped to highlight some of the issues Dunedin would face in the event of a local earthquake. Cont/

    Civil Defence Information
    The first port of call is the otagocdem.govt.nz website.

    In the event of an emergency striking Dunedin, there were some key things for households to have prepared. Those included vital supplies, access to important documents, identification, medication, and a means of feeding and/or controlling pets. (via ODT)

    EMERGENCY KIT
    Essential
    Water
    First aid kit
    Torch and radio
    Blankets or sleeping bags
    Non-perishable food
    Useful
    Fire extinguisher
    Can opener
    Wind and waterproof clothing, strong outdoor shoes
    Face and dust masks
    Emergency toilet provisions
    Primus or gas barbecue
    Personal
    Medication
    Pet supplies
    Also knowing where your important documentation (passports, insurance policies, driver’s licences etc) is is also helpful if you have to leave home without warning
    — Otago Civil Defence Emergency Management Group

    █ I would add a cheap windup phone charger/torch. Buy them at stores like Noel Leeming or Harvey Norman.

    • Hype O'Thermia

      The thing is, no matter where you keep your emergency pack, unless it’s strapped to your body at all times it’s liable to be somewhere you can’t get to it when you need it.

  27. Elizabeth

    ODT Insight : Otago’s coastal communities dodged a bullet when a tsunami generated by last month’s Kaikoura earthquake took aim at the South. Now the race is on to be ready when the next one strikes. Chris Morris reports.

    Many coastal communities did not have sirens and relied on volunteer firefighters to raise the alarm, but hard questions would need to be answered.

    Acting Civil Defence Minister Gerry Brownlee said problems with the Civil Defence response needed to be reviewed, and plans for a national text-based tsunami alert system would be accelerated.

    Sat, 3 Dec 2016
    ODT: Calls for fast-tracked tsunami alert system backed
    The man in charge of Otago Civil Defence is throwing his weight behind calls for a fast-tracked national tsunami alerting system. Chris Hawker, Otago Civil Defence and Emergency Management Group regional manager, said a combined system of cellphone text alerts, tsunami sirens or other technology was needed to communicate the warning as quickly as possible. Cont/

    ODT: Tsunami threat: A question of timing
    New Zealand Fire Service Otago and Southland assistant area commander Rodger Smith said the approach needed to be reviewed, including the timeliness of the Civil Defence response and the safety of volunteer firefighters. Cont/

    ODT: Serious tsunamis a real possibility
    A 2013 review by GNS Science predicted waves of 4m-6m were possible along Dunedin’s shores — depending on the source and the size of the quake — up from previous estimates of 3.8m in 2005. […] The greater uncertainty about the maximum magnitude of earthquakes on local faults meant the threats could be “severely” overestimated, or underestimated. Cont/

  28. Elizabeth

    Alert system can already spread information faster than the authorities following events like last month’s earthquake and tsunami warnings.

    Sun, 4 Dec 2016
    ODT: Inventor: alert ready to go
    As the Government considers a  national tsunami text alert system, a Dunedin developer says the answer is already here. Lert Info director Stuart Gunn’s text and email-based system, developed four years ago, now boasts about 10,000 subscribers throughout New Zealand. It drew information from official sources and allowed warnings and other information to be quickly sent to subscribers, with the alert “geo-fenced” — or restricted to certain areas — as needed. It was technically possible to broadcast an alert to every cellphone in an area butto do so would take a law change, Mr Gunn said. Cont/

  29. Gurglars

    I’ve joined Alert, let’s hope I hear the dingle.

  30. Elizabeth

    Sat, 10 Dec 2016
    ODT Insight: Quake lessons for Dunedin, prof says
    Civil Defence assumptions about the likelihood of a major earthquake in Dunedin need to be reconsidered following Kaikoura’s seismic shake, a University of Canterbury professor says. The call came as ODT Insight found authorities in Otago still had work to do to prepare for a magnitude 8-plus Alpine Fault earthquake, which scientists estimate has a 30% chance of striking within 50 years. Associate Prof Tim Davies, a specialist in natural hazards and disaster management, told ODT Insight last month’s Kaikoura earthquake should shake assumptions about where large earthquakes could occur. Seismologists have found at least 10 faults combined to produce Kaikoura’s 7.8-magnitude quake, although the largest of them — the Hope Fault — had hardly ruptured at all. Cont/

    ****

    Sat, 10 Dec 2016
    When the earth moves…
    An Alpine Fault earthquake will result in more scenes of destruction in the South Island, from damaged roads and buildings to landslips and evacuations, in a repeat of Christchurch and Kaikoura.
    A monster quake is brewing deep within the South Island’s Alpine Fault. But, as the clock ticks down, just how ready are we? What if the shaking started now? Chris Morris reports. […] It is a scenario being planned for by the South Island’s Civil Defence authorities as they prepare for the magnitude 8-plus earthquake believed to be brewing deep inside the Alpine Fault. It is the type of rupture that has occurred somewhere on the 600km fault, running up the spine of the South Island, on average every 300 years or so. Cont/
    █ See other infographics at the ODT story link.

    Brendon Bradley UC Published on May 31, 2016
    AlpineFaultScenarioM7 9Eq BlenderRenderOverlayCumulative 26May2016
    This is a Blender animation from a simulation of the Simulation of a potential Alpine Fault earthquake. The animation was developed by Nick Young of eResearch at the University of Auckland. The simulation was performed by the Bradley research group at the University of Canterbury using UC’s BlueGeneP Supercomputer (part of the NZ eScience Infrastructure, NeSI).

    -Mw7.9 Alpine fault event with Sth hypocentre.
    -Velocity model is South Island Vel Model, siVMv1.64, which contains the 3D ‘coarse’ travel time tomography model of Eberhart-Phillips et al. with the detailed CantVM1.64 model of the Canterbury basin.
    -Animation is with 0.4km grid spacing, so only longer period shaking is shown (the 0.1km grid spacing simulation is too large to upload to YouTube presently).

    Note: This is one possible rupture scenario for a large Alpine Fault event. We are currently considering numerous rupture scenarios (both the size of the fault that ruptures and also the location where the rupture initiates [the star]), as these factors have an important influence on the resulting ground shaking intensity.

    Information about the Alpine fault itself can be found at:
    http://www.gns.cri.nz/Home/Learning/Science-Topics/Earthquakes/Major-Faults-in-New-Zealand/Alpine-Fault

    Brendon Bradley UC Published on Aug 17, 2016
    Alpine fault ground motions: Effect of rupture initiation location
    Comparison of three hypothetical Mw7.9 Alpine fault earthquakes (identical fault geometry) with three different hypocentre (rupture initiation) locations: North, central, south (left to right) which produce uni-lateral (North/South) and bi-lateral (central) rupture, and lead to very different wave propagation over the South Island.
    Animation produced by Sung Bae, Viktor Polak and Brendon Bradley
    (ref: AlpineFault400m m7p90 411p0x17p3 s1129570 n2s VMSI v1p64 400m h0p400 EMODv3p0p4 160814)

    ****

    Sun, 11 Dec 2016
    ODT: Quakes put focus on civil defence
    The Kaikoura earthquakes have given community boards a chance to review their civil defence procedures, Otago Peninsula Community Board chairman Paul Pope says. While the fire brigade had done “very, very well” evacuating people from the low-lying peninsula areas after the tsunami warning was issued on the morning of November 14, there was still some confusion about where residents needed to go, Mr Pope said. He was working with civil defence and other groups to work out how better to help the peninsula community understand evacuation procedures, gain community feedback and let people know about low-lying areas on the peninsula. Cont/

  31. Elizabeth

    █ Civil Defence Information
    The first port of call is the otagocdem.govt.nz website.

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