Hard News by Russell Brown

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Hard News: The new wave

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  • Tony Parker,

    The all clear has been given in Napier. They closed off parts of the city 200m from the shoreline apparantly.

    Napier • Since Nov 2008 • 232 posts Report

  • dc_red,

    I for one can't wait for the Herald's inevitable "You're Vuze on What Should be Dun About All These Sunami's"

    Oil Patch, Alberta • Since Nov 2006 • 706 posts Report

  • Sacha,

    Or "Tell us why tsunamis annoy you as much as bank fees do"

    Ak • Since May 2008 • 19745 posts Report

  • Tom Beard,

    I for one can't wait for the Herald's inevitable "You're Vuze on What Should be Dun About All These Sunami's"

    Send them back to Samoa! Damn immigants.

    Wellington • Since Nov 2006 • 1040 posts Report

  • Yamis,

    Since Nov 2006 • 903 posts Report

  • Luke Williamson,

    Referendum: Do you think tsumami should be larger than 50cm as part of good parenting?

    Warkworth • Since Oct 2007 • 297 posts Report

  • Paul Campbell,

    "How you can profit from the new beach front real-state boom after the tsunamis ..."

    oh wait, that's the SST

    Dunedin • Since Nov 2006 • 2623 posts Report

  • Joe Wylie,

    No, but I think that somethings wrong with the spelling.

    Nah, that's the kind of tsunami you get in a vat of soy sauce - or maybe just a large wave chocka with anchovies.

    flat earth • Since Jan 2007 • 4593 posts Report

  • Paul Campbell,

    you know I think the data on the tsunami warning map is running an hour or so later than real time ....

    Dunedin • Since Nov 2006 • 2623 posts Report

  • Jolisa,

    Gawd, Yamis - you're right. No laughing matter in Samoa.

    Joe: what exquisite taste in humour.

    Auckland, NZ • Since Nov 2006 • 1472 posts Report

  • Tom Beard,

    Thanks, Yamis. First reports seemed to indicate that the coasts had been evacuated, so we thought we could afford to be a bit flippant. But this is a real tragedy.

    Wellington • Since Nov 2006 • 1040 posts Report

  • Glenn Pearce,

    you know I think the data on the tsunami warning map is running an hour or so later than real time ....

    Either that or Civil Defense is about to get very embarrased.

    On the map North Cape is just starting to flicker

    Auckland • Since Feb 2007 • 504 posts Report

  • Lucy Stewart,

    Gawd, Yamis - you're right. No laughing matter in Samoa.

    At least it sounds like they had a decent evacuation plan going. It could have been much, much worse.

    Wellington • Since Nov 2006 • 2105 posts Report

  • Sacha,

    Not tsunami related, but gosh those private schools clearly need the recent cash injection from govt.

    Luxury hotel and spa Hotel du Vin has been sold to Dilworth School for an undisclosed figure and is to be converted into a rural campus.

    Ak • Since May 2008 • 19745 posts Report

  • Ben Gracewood,

    you know I think the data on the tsunami warning map is running an hour or so later than real time ....

    I was thinking that too, but now it looks like Civil Defence and NZ Herald completely screwed the pooch. I hope no one gets injured.

    Orkland • Since Nov 2006 • 168 posts Report

  • Kim_Wright,

    I notice a few people have been comparing a 1m tsunami wave with regular large tides... tsunami waves travel dangerously fast and even the small ones can cause strange currents, eddies and fast flows when they hit coastal landforms so it is prudent to warn for small waves and stay ourt of the water and low-lying areas (up to a point of course it's not going to createhuge run-ups).

    You can't really use the "we get bigger storm tides than that" argument when it comes to these types of phenomena..... it's showing a bit more on the geonet gauges now so looks like intial wave arrival times were a bit out.

    It also pays to remember that tsunami are a series of waves not one wave and the first wave is not always the biggest....

    Wellington • Since May 2009 • 57 posts Report

  • LegBreak,

    What Don said about being more at risk within Wellington harbour.
    This from Te Ara's excellent entry on NZ's tsunami history (about the 1855 Wairarapa earthquake:)

    About 20 minutes after the earthquake, tsunami waves surged into Wellington Harbour through its narrow entrance, then for many hours bounced repeatedly back and forth, reflected off the harbour sides. Water also flooded into Lyall Bay from Cook Strait and Evans Bay from Wellington Harbour, putting the low isthmus between them (the site of Wellington Airport) under nearly a metre of water.

    Not expert at all, but wouldn’t that be totally different from a tsunami coming towards Wellington?

    In the 1855 quake the ground in Wellington itself moved significantly, raising the Basin and parts of the Miramar peninsular.

    So the waves would have started from inside the harbour itself, and then washed around for a long time.

    Wellington • Since Nov 2006 • 1162 posts Report

  • Paul Campbell,

    and look at the Chathams now too - I hope it's the data that's late

    Dunedin • Since Nov 2006 • 2623 posts Report

  • ChrisW,

    you know I think the data on the tsunami warning map is running an hour or so later than real time ....

    Either that or Civil Defense is about to get very embarrased.
    On the map North Cape is just starting to flicker

    As suggested earlier (10.36), I'm pretty sure the waves then being recorded at Raoul Island at heights of up to c.60 cm or so will be those reflected back off the various islands of Samoa, hence the lag time relative to models based on expected first wave direct from source, and their irregularity. These will be the waves arriving now in NZ further attenuated to quarter that size.

    That there were no clearly detectable waves at either of the two tsunami gauges on Raoul (Fishing Rock on north coast, Boat harbour on south) at around the expected time should have given confidence no damaging tsunami was heading in our direction - and the arrival of the small reflected waves later is good to confirm that the system's working perfectly. But not being interpreted as such by Civil Defence which was e.g. still recommending evacuation of *western* Waikato coast even after non-arrival of tsunami at East Cape let alone Raoul. Why have such a brilliant system of gauges, but not use them?

    Tsumamis being asymmetric, waves of very different strength in different directions from source, is normal, depending on the specifics of how the seafloor moved at source. In this case the main waves were apparently directed north and east rather than SW.

    Gisborne • Since Apr 2009 • 851 posts Report

  • Matthew Poole,

    Not tsunami related, but gosh those private schools clearly need the recent cash injection from govt.

    Luxury hotel and spa Hotel du Vin has been sold to Dilworth School for an undisclosed figure and is to be converted into a rural campus.

    Sacha, Dilworth's endowment is enormous, to the point that it pays all costs associated with being a pupil for every student. Including toiletries. That they've got massive wealth doesn't necessarily hold true of other private schools, so they're a poor argument against increased government funding for private schools. Dilworth could survive without any government funding, and aren't known for crying "poor, poor" in any case.

    Auckland • Since Mar 2007 • 4097 posts Report

  • Glenn Pearce,

    As suggested earlier (10.36), I'm pretty sure the waves then being recorded at Raoul Island at heights of up to c.60 cm or so will be those reflected back off the various islands of Samoa

    This is interesting, so the actual Tsunami doesn't register on the Graph at all but the reflected waves do ?

    Aren't the reflected waves potentially as dangerous anyway ?

    Auckland • Since Feb 2007 • 504 posts Report

  • Sacha,

    Thanks, Matthew. Interesting symbolism nonetheless.

    Ak • Since May 2008 • 19745 posts Report

  • Christopher Dempsey,

    Sacha, Dilworth's endowment is enormous, [snip!]. Dilworth could survive without any government funding, and aren't known for crying "poor, poor" in any case.

    And often, being the good Anglican school that they are, give the air of faint embarrassment at being the target of Tolley's 'let's-shovel-lots-of-money-to-poor-little-rich-private-schools' crusade.

    Thankfully for them when it comes to prat-ish behaviour exhibited by those in power (developers, politicians) Kings gets fingered and rightly so.

    Parnell / Tamaki-Auckland… • Since Sep 2008 • 659 posts Report

  • ChrisW,

    Aren't the reflected waves potentially as dangerous anyway ?

    Reflected waves potentially dangerous if they were big enough, as for example in the sloshing around in Wellington Harbour in 1855 scenario, but they're not in this case. Could be unusual surging currents around harbours and headlands if local sea level changes 30 cm in a few minutes, but no need to move stock to higher levels, unless they were out grazing the mudflats.

    Gisborne • Since Apr 2009 • 851 posts Report

  • Matthew Poole,

    And often, being the good Anglican school that they are, give the air of faint embarrassment at being the target of Tolley's 'let's-shovel-lots-of-money-to-poor-little-rich-private-schools' crusade.

    Thankfully for them when it comes to prat-ish behaviour exhibited by those in power (developers, politicians) Kings gets fingered and rightly so.

    Dilworth is, of course, greatly aided in that it doesn't take paying students and only offers places to those from less-privileged families. That gives it enormous moral authority that the likes of Kings can never have. I have no doubt that there are a fair number of Dilworth old boys who have mud on their faces, but not associating during formative years with those who come from families of "means" is a good way to reduce the propensity to grow up as a selfish cock.

    Auckland • Since Mar 2007 • 4097 posts Report

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