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seanz
07-15-2009, 05:10 AM
6.6 and seemed to last for a minute or so.
http://www.geonet.org.nz/earthquake/quakes/3124785g.html

A long way from here (the South end of the island) but it was still impressive. The house sort of gently swayed back and forth for a bit.
The last time there was an earthquake like this there was only minor damage near the epicenter (same area, I think) so, fingers crossed....

seanz
07-15-2009, 05:21 AM
http://www.stuff.co.nz/national/2597897/Fiorldland-quake-measures-6-6

No reports of major damage.......phew.


Pacific Tsunami Warning Centre in Hawaii issued a warning right away but unless you were right on top of it you'd be fine, let's hope nobody was.

Fitz
07-15-2009, 05:47 AM
USGS is saying 7.8. That is a big one. Glad you are safe.

http://earthquake.usgs.gov/eqcenter/recenteqsww/Quakes/us2009jcap.php#details

seanz
07-15-2009, 06:01 AM
Thanks, I'm fine but the cat was a bit nervous.:)

There seems to be bit of variation in readings, Hawaii has the quake at 8.2. I wonder why there is such a big difference?

Please click on the newspaper link, some of the quotes are classics.
:)

The Bigfella
07-15-2009, 06:26 AM
My son tells me we just got a Tsunami alert on the TV... details to come after the football is over.

Hwyl
07-15-2009, 06:27 AM
Glad that you're O.K. and that things stay that way.

Fitz
07-15-2009, 06:31 AM
Early mags are usually an estimate to get the word out. When more data is collected the mag is usually adjusted. There is a good discussion here:

http://earthquake.usgs.gov/eqcenter/glossary.php#magnitude

mmd
07-15-2009, 06:36 AM
I heard about this on the CBC radio news this morning at about 7:30 (GMT+4hrs). Reports say that there is some minor damage to buildings, but no major damage and no reported deaths or injuries. Also, the tsunami warning has been recalled. I hope that this is accurate information.

skuthorp
07-15-2009, 06:37 AM
Haven't heard a whisper down here. (what a try for slater!)

PeterSibley
07-15-2009, 06:42 AM
My Mum saw the Napier earthquake ....I reckon EnZed is going to disappear one day ....glub ,glub .

PeterSibley
07-15-2009, 06:45 AM
I'm glad you're safe !

NZ is very similar to Japan isn't it ?

Fitz
07-15-2009, 07:15 AM
Basically, New Zealand geology is different than Japan's in that NZ falls on the boundary between the Australian and Pacific Plates. The South Island and North Island are separated by the fault between the plates. Movement along the fault is strike slip - similar to Calif. San Andreas.

Japan's quakes are associated with a subduction zone, where oceanic crust is plunging beneath the island.

PeterSibley
07-15-2009, 07:20 AM
Thanks ...interesting .Could you post a site that expands on that but in lay terms ?

Fitz
07-15-2009, 07:34 AM
Sure Peter, here is some plate tectonics:

http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Continents.shtml

PeterSibley
07-15-2009, 07:45 AM
Much appreciated !

The Bigfella
07-15-2009, 08:49 AM
Ahh - plate tectonics... I remember seeing the globe that was used in the development of that theory... it is at the university in Hobart, Tasmania. Nicely drawn on, of course.

Phillip Allen
07-15-2009, 09:00 AM
My son tells me we just got a Tsunami alert on the TV... details to come after the football is over.

Oh, Very funny...

seanz
07-15-2009, 02:31 PM
My Mum saw the Napier earthquake ....I reckon EnZed is going to disappear one day ....glub ,glub .
:rolleyes::p
Not at all.....quite the reverse, actually.........
:D


The 1855 Wairarapa earthquake


In 1855 a magnitude 8.2 earthquake – the most powerful ever recorded in New Zealand – rocked the southern part of the North Island. Caused by movement along a fault in Palliser Bay, it altered the landscape of the Wellington region and affected its subsequent urban development
Changes to the landscape

The uplift created a new fringe of beach and rock platforms along the Wellington coast. Many jetties in Wellington Harbour became unusable, but there were also beneficial effects. Blocks of the city’s central business district now occupy land that was below sea level before 1855. The newly exposed strip of shoreline between Wellington and the Hutt Valley offered a safe road and railway route – parts of the coastal road had previously been impassable at high tide. The uplift of the region helped drain the swampy lower reaches of the Hutt Valley. Commerce lost but sports gained when a low-lying area known as the Basin Reserve, originally proposed as a shipping basin, instead became Wellington’s cricket grounds.

http://www.teara.govt.nz/EarthSeaAndSky/NaturalHazardsAndDisasters/HistoricEarthquakes/3/en

The quake last night has been upgraded to a 7.8 on the Geo-Net site.....which is what Fitz said it was. So, how'd he know before they did?

JimD
07-15-2009, 03:15 PM
My son tells me we just got a Tsunami alert on the TV... details to come after the football is over.

Glad you have your priorities in order.

John B
07-15-2009, 04:59 PM
:rolleyes::p
Not at all.....quite the reverse, actually.........
:D

http://www.teara.govt.nz/EarthSeaAndSky/NaturalHazardsAndDisasters/HistoricEarthquakes/3/en

The quake last night has been upgraded to a 7.8 on the Geo-Net site.....which is what Fitz said it was. So, how'd he know before they did?


bring back gondolaland .. er gondwandalala land ...er..

PeterSibley
07-15-2009, 06:04 PM
[quote=seanz;2257611]:rolleyes::p
Not at all.....quite the reverse, actually.........
:D/quote]

Tongariro comes to mind though no doubt I've got the spelling wrong !:D
A geologist I worked for reckoned there is going to be a very big bang one day .

jevvv
07-15-2009, 06:59 PM
So where in Mainland are you Seanz?

Glad to hear you're aok

seanz
07-16-2009, 03:17 AM
So where in Mainland are you Seanz?


Just North of Christchurch.

7.8 is huge, very lucky it was deep and in one of the more sparsely populated areas.

dhic001
07-16-2009, 03:24 AM
Tongariro comes to mind though no doubt I've got the spelling wrong !:D
A geologist I worked for reckoned there is going to be a very big bang one day .

Well there has been a very big bang in the past, Lake Taupo is the result (for those not familiar with NZ Geography, thats the big lake in the middle of the North Island, its a volcanic crater). Maybe something similar will happen again, who knows. One thing that is definitely happening is that the South Island is moving north, although it'll be a a long time before the Cook Straight ferries are made redundant.
Daniel

skuthorp
07-16-2009, 04:43 AM
Here's a quote I liked from a link posted here'
"By the beginning of the 20th century the earthquake hazard was largely discounted, and between 1913 and 1926 the New Zealand Official Yearbook included the comment that ‘earthquakes in New Zealand are rather a matter of scientific interest than a subject for alarm’."
Oh yes?

PeterSibley
07-16-2009, 04:57 AM
Ahh ! Just before the Napier earthquake .
The 1931 Hawke's Bay earthquake, also known as the Napier earthquake, occurred in New Zealand (http://en.wikipedia.org/wiki/New_Zealand) at 10:47 am on Tuesday February 3 (http://en.wikipedia.org/wiki/February_3), 1931 (http://en.wikipedia.org/wiki/1931), killing 256[1] (http://en.wikipedia.org/wiki/1931_Hawke%27s_Bay_earthquake#cite_note-deathtoll-0) and devastating the Hawke's Bay (http://en.wikipedia.org/wiki/Hawke%27s_Bay_%28region%29) region. Centred 15 km north of Napier (http://en.wikipedia.org/wiki/Napier,_New_Zealand), it lasted for two and a half minutes and measured about 7.8 on the Richter scale (http://en.wikipedia.org/wiki/Richter_magnitude_scale), and 7.9 on the moment magnitude scale (http://en.wikipedia.org/wiki/Moment_magnitude_scale). There were 525 aftershocks recorded in the following two weeks. The main shock could be felt in much of the lower half of the North (http://en.wikipedia.org/wiki/North_Island)Island.

Mum said it was memorable ,very memorable .

skuthorp
07-16-2009, 05:15 AM
Feb 3 eh, if I remember rightly that was the date that Ramon Berenguer III of Barcelona (http://en.wikipedia.org/wiki/Ramon_Berenguer_III_of_Barcelona) and Douce I of Provence (http://en.wikipedia.org/wiki/Douce_I_of_Provence) marry, uniting the fortunes of those two states. :D:rolleyes:

PeterSibley
07-16-2009, 05:34 AM
Are you having a go at my Wiki skills ? :D

skuthorp
07-16-2009, 05:46 AM
What? Me?