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-   -   Tsunami Hits The Shores Of New Zealand!! (http://ledge.fleetwoodmac.net/showthread.php?t=40964)

David 07-15-2009 12:09 PM

Tsunami Hits The Shores Of New Zealand!!
 
A tsunami has struck the shores of New Zealand today after a strong earthquake (magnitude 7.6) occurred off the west coast of South Island, according to the Pacific Tsunami Warning Center (PTWC) in Ewa Beach, HI.

Tsunami tide gauges measured tsunami amplitude at Jackson Bay, NZ, at 0.17 meters (or 0.5 feet).

The quake occurred at 2:23 a.m. Pacific time, July 15.

New Zealand ledgies who live along the shores of southwest & southeast New Zealand, stay tuned to your local emergency radio & TV.

vivfox 07-15-2009 11:44 PM

A 7.8-magnitude earthquake struck off New Zealand's western coast Wednesday generating a small tsunami. No injuries or major damage were reported.

The Pacific Tsunami Warning Center in Hawaii warned that a tsunami was generated, but it later said the waves were less than 8 inches in height and the warning was canceled after about an hour.
http://www.foxnews.com/story/0,2933,532701,00.html

tuigirl 07-16-2009 09:52 AM

phew!!! just seen this news..thank goodness it's only a little wave. Having said that, I would imagine that NZers are fully prepared to move in a hurry if needs be...the threat of a major wave/quake/ volcanic eruption etc is never far from their minds (it's something wer'e used to from the get go..literally!)
Brandon....hope you didn't go out to the shore to see it!!!!!

mylittledemon 07-16-2009 08:34 PM

I was sitting in bed reading...i thought my wife was under the bed messing with me. The whole thing shook like a coin operated vibrating bed in a cheap motel (not that I would KNOW what those are like...ahem...) Very scary...and technically that earthquake was nowhere near Wellington.

vivfox 07-16-2009 09:09 PM

[QUOTE=tuigirl;831029]phew!!! just seen this news..thank goodness it's only a little wave. Having said that, I would imagine that NZers are fully prepared to move in a hurry if needs be...the threat of a major wave/quake/ volcanic eruption etc is never far from their minds (it's something wer'e used to from the get go..literally!)
Brandon....hope you didn't go out to the shore to see it!!!!![/QUOTE]

Yeah, those eight inch waves would have knocked him over, fa sho.

David 07-16-2009 10:37 PM

You guys are making fun of me! Now come on, don't joke about this. There seem to be a couple of misconceptions.

1) Don't confuse a tsunami -- even a very small one -- with a wind-generated surf wave. Even a small tsunami packs far more energy than a surf (or surface) wave.

2) Tsunami amplitude is not the same as wave height (crest to trough). Tsunami amplitude refers to the height of surge above mean sea level. So if mean sea level at high tide on a particular beach is 9 feet, a tsunami with an amplitude of 1 foot transforms that 9-foot high tide into a 10-foot high tide. It might not sound like a big deal, but it's an enormous difference in water volume at the shore.

This tsunami occurred right offshore of Fiordland, probably on the subduction fault. It's very dangerous when tsunamis occur so close to shoreline because the warning systems in place require more time to generate than a tsunami would require to reach the shoreline from the generating source. So let's say the warning system (& Australia has a very good one) takes 12 minutes from the time of the quake to the time of the warning being sent to authorities. But the tsunami is traveling at speed v & can therefore reach the closest shorelines to it within, say, three or four minutes. The only "warning" people on those nearby beaches would have is the quake itself.

And big quakes like this one can always generate subaerial & submarine landslides & slumps, which can create their own extremely dangerous tsunamis. It didn't happen this time, but it has happened in New Zealand's past, & will happen in the future.

tuigirl 07-17-2009 05:29 AM

Quote:

Originally Posted by mylittledemon (Post 831144)
I was sitting in bed reading...i thought my wife was under the bed messing with me. The whole thing shook like a coin operated vibrating bed in a cheap motel (not that I would KNOW what those are like...ahem...) Very scary...and technically that earthquake was nowhere near Wellington.

Get used to it babe :xoxo: practice your door/underbed diving skills!! Wellington is overdue a big one btw, it's practically built on a faultline.. well the motorway is...(just to cheer you up);)

tuigirl 07-17-2009 05:30 AM

[QUOTE=vivfox;831151]
Quote:

Originally Posted by tuigirl (Post 831029)
phew!!! just seen this news..thank goodness it's only a little wave. Having said that, I would imagine that NZers are fully prepared to move in a hurry if needs be...the threat of a major wave/quake/ volcanic eruption etc is never far from their minds (it's something wer'e used to from the get go..literally!)
Brandon....hope you didn't go out to the shore to see it!!!!![/QUOTE]

Yeah, those eight inch waves would have knocked him over, fa sho.

gosh, you know what I mean :laugh:

tuigirl 07-17-2009 05:36 AM

David...I hope it didn't come across that I was making fun of you...jeez no, not at all.
Actually what you have now said, about the "technical" side of a tsunami is really interesting and shows me I was rather uninformed about it all, so now I'm alot wiser. thanks for posting.

mylittledemon 07-17-2009 07:05 AM

Quote:

Originally Posted by tuigirl (Post 831215)
Get used to it babe :xoxo: practice your door/underbed diving skills!! Wellington is overdue a big one btw, it's practically built on a faultline.. well the motorway is...(just to cheer you up);)

God help me when the big one hits. It amazes me how that "big one" back in the 1850s brought up the shore line as far as it did.

tuigirl 07-17-2009 03:46 PM

Quote:

Originally Posted by mylittledemon (Post 831224)
God help me when the big one hits. It amazes me how that "big one" back in the 1850s brought up the shore line as far as it did.

Aaahhh, yes...the motorway faultline....along with the WIND...just another thing to love Wellington for...hehehe

David 07-17-2009 06:00 PM

Quote:

Originally Posted by tuigirl (Post 831217)
David...I hope it didn't come across that I was making fun of you...jeez no, not at all.

I know you weren't. I was just affecting a phony umbrage.

Quote:

Actually what you have now said, about the "technical" side of a tsunami is really interesting and shows me I was rather uninformed about it all, so now I'm alot wiser. thanks for posting.
You'll love this little clip! www.sendspace.com/file/h43ser

mylittledemon 07-18-2009 12:22 AM

Quote:

Originally Posted by David (Post 831307)
I know you weren't. I was just affecting a phony umbrage.

That's why we like you. ;)

vivfox 07-18-2009 12:36 AM

A tsunami destroys the bay area:

Photobucket

mylittledemon 07-18-2009 12:57 AM

Wowzers! That's scary! The baby cracked me up though ;)


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