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(io9)   Now we know why the Japanese tsunami was so huge   (io9.com) divider line 35
    More: Interesting, Japanese tsunami, Japanese, tectonic plates, tsunamis, leading edge, elastic energy  
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10834 clicks; posted to Geek » on 25 Aug 2012 at 5:00 AM (1 year ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2012-08-24 10:36:47 PM
Good article. Nice find.
 
2012-08-24 10:52:12 PM
Japanese researcher: 'Why the fuq should I care about some seismology research? I'm too busy designing the next video game system.'
 
2012-08-25 12:14:02 AM
From the article:

but the tremendous size of the Japanese tsunami went beyond their wildest expectations - with some waves reaching as high as 20 feet.

http://en.wikipedia.org/wiki/1960_Valdivia_earthquake

The temblor caused localised tsunamis that severely battered the Chilean coast, with waves up to 25 metres (82 ft).

What am I missing here?
 
2012-08-25 12:25:29 AM

Mike_LowELL: From the article:

but the tremendous size of the Japanese tsunami went beyond their wildest expectations - with some waves reaching as high as 20 feet.

http://en.wikipedia.org/wiki/1960_Valdivia_earthquake

The temblor caused localised tsunamis that severely battered the Chilean coast, with waves up to 25 metres (82 ft).

What am I missing here?


I noticed the discrepancy as well.

I figured it meant that out to sea the waves were 20 feet high yet once they hit the continental shelf and made it to land they go up to 25 metres.

That's just a guess though.
 
2012-08-25 01:13:50 AM
Could be they're also considering the impact -- a whole lot more people affected in Japan.
 
2012-08-25 02:10:50 AM
Godzilla?

Oh, never mind.
 
2012-08-25 03:47:23 AM

Mike_LowELL: From the article:
but the tremendous size of the Japanese tsunami went beyond their wildest expectations - with some waves reaching as high as 20 feet.
http://en.wikipedia.org/wiki/1960_Valdivia_earthquake
The temblor caused localised tsunamis that severely battered the Chilean coast, with waves up to 25 metres (82 ft).
What am I missing here?


There is probably a big difference between a localized tsunami and a general tsunami. Given that the 1960 tsunami was in Chile, I imagine a scenario like a river meeting the ocean with steep hills on either side of the river. All the water from the tsunami is forced into the river instead of being spread along the coast. It's possible the volume of water in the tsunami is much lower even if the water level higher.
 
2012-08-25 05:35:19 AM

Stingy Alpha Wolf King Dude: Japanese researcher: 'Why the fuq should I care about some seismology research? I'm too busy designing the next video game system.'


wait what?!
Are you saying that we should have read those stones which talked about NOT building closer to the sea than this point? Something about GIANT WAVES OF WATER???
What a bunch of hooey
 
2012-08-25 05:41:25 AM

Mike_LowELL:
The temblor caused localised tsunamis that severely battered the Chilean coast, with waves up to 25 metres (82 ft).

What am I missing here?


You're comparing two different waves in different areas. They calculate a predicted wave height based on the depth of the ocean floor in the area, and the rate of the rise. Without looking it up, I might guess that the shelf off the coast of Chili gets shallow very quickly, while the shelf off of Japan is deeper.
 
2012-08-25 06:04:51 AM
Pff those things are no more then annoying once you've gotten the water ward. 
www.shockya.com 

/then there's the jellify water power, if you catch a tsunami right away it'll stop it dead in its tracks
 
2012-08-25 07:01:33 AM

namatad: Stingy Alpha Wolf King Dude: Japanese researcher: 'Why the fuq should I care about some seismology research? I'm too busy designing the next video game system.'

wait what?!
Are you saying that we should have read those stones which talked about NOT building closer to the sea than this point? Something about GIANT WAVES OF WATER???
What a bunch of hooey


You realize Japan's a bunch of islands, right? The point of this article wasn't that Japan built stupidly, it's that major earthquakes behave differently than we thought. Japan's sea-walls were built to handle high waves, not the immediate subsistence of the entire island chain plus high waves. Nowhere on islands like the Japanese archipelago is truly safe from tsunamis; the one is 2011 caused river surges that flooded out villages in the mountains dozens of miles and hundreds of feet above the hardest hit areas. No matter how well you plan and prepare, this stuff is going to happen and it's going to hurt.
 
2012-08-25 07:22:56 AM
Mostly bullshiat. If the material was already under-water it was already displacing the water.

In order to combine up and produce such a reinforcing magnitude we're talking about a quarter of the mass of Japan having to move. The math for cliff-slides into the ocean does NOT apply under the water. There's not enough variation in density for such to be effective and the flow would circulate around the moving mass, not directly away.
 
2012-08-25 07:30:33 AM
Duly noted, guys. Thanks for the input.
 
2012-08-25 08:17:31 AM

prjindigo: Mostly bullshiat. If the material was already under-water it was already displacing the water.

In order to combine up and produce such a reinforcing magnitude we're talking about a quarter of the mass of Japan having to move. The math for cliff-slides into the ocean does NOT apply under the water. There's not enough variation in density for such to be effective and the flow would circulate around the moving mass, not directly away.


Wow - you should point that out to the so-called scientists at Cambridge.
 
2012-08-25 08:28:59 AM
So it IS the motion in the ocean...
 
2012-08-25 08:51:41 AM

BumpInTheNight: Pff those things are no more then annoying once you've gotten the water ward. 
[www.shockya.com image 500x281] 

/then there's the jellify water power, if you catch a tsunami right away it'll stop it dead in its tracks


I love that game.
 
2012-08-25 09:14:35 AM

prjindigo: Mostly bullshiat. If the material was already under-water it was already displacing the water.

In order to combine up and produce such a reinforcing magnitude we're talking about a quarter of the mass of Japan having to move. The math for cliff-slides into the ocean does NOT apply under the water. There's not enough variation in density for such to be effective and the flow would circulate around the moving mass, not directly away.


Let me guess, you have a GED in seismology and physics?
 
2012-08-25 09:44:59 AM

Mike_LowELL: From the article:

but the tremendous size of the Japanese tsunami went beyond their wildest expectations - with some waves reaching as high as 20 feet.

http://en.wikipedia.org/wiki/1960_Valdivia_earthquake

The temblor caused localised tsunamis that severely battered the Chilean coast, with waves up to 25 metres (82 ft).

What am I missing here?


(South) American tsunami much larger than Japanese tsunami. Much, much larger.
 
2012-08-25 10:39:07 AM

meat0918: Mike_LowELL: From the article:

but the tremendous size of the Japanese tsunami went beyond their wildest expectations - with some waves reaching as high as 20 feet.

http://en.wikipedia.org/wiki/1960_Valdivia_earthquake

The temblor caused localised tsunamis that severely battered the Chilean coast, with waves up to 25 metres (82 ft).

What am I missing here?

(South) American tsunami much larger than Japanese tsunami. Much, much larger.


img156.imageshack.us

japanese tsunami so small. So small!
 
2012-08-25 10:40:54 AM

s1ugg0: BumpInTheNight: Pff those things are no more then annoying once you've gotten the water ward. 
[www.shockya.com image 500x281] 

/then there's the jellify water power, if you catch a tsunami right away it'll stop it dead in its tracks

I love that game.


I have no idea what game it is.
 
2012-08-25 10:52:16 AM

RedPhoenix122: s1ugg0: BumpInTheNight: Pff those things are no more then annoying once you've gotten the water ward. 
[www.shockya.com image 500x281] 

/then there's the jellify water power, if you catch a tsunami right away it'll stop it dead in its tracks

I love that game.

I have no idea what game it is.


Its called From Dust. Its tickles your populous bone for sure, a god game where you're spending the vast majority of your time manipulating the terrain to get through the level. It is literally a sandbox game. But heads up its published by Ubisoft.
 
2012-08-25 10:58:13 AM
Go go go
 
2012-08-25 10:58:51 AM

prjindigo: Mostly bullshiat. If the material was already under-water it was already displacing the water.

In order to combine up and produce such a reinforcing magnitude we're talking about a quarter of the mass of Japan having to move. The math for cliff-slides into the ocean does NOT apply under the water. There's not enough variation in density for such to be effective and the flow would circulate around the moving mass, not directly away.


Okay, can you explain to me where all the energy ultimately goes if not into a shockwave?
 
2012-08-25 11:34:09 AM
Sid_6.7:

What?
 
2012-08-25 11:58:12 AM

BumpInTheNight: Ubisoft


Ahh, that's why I avoided it.

/farking draconian DRM
 
2012-08-25 01:37:19 PM
Japanese researcher: 'Why the fuq should I care about some seismology research? I'm too busy designing the next video game system.'

So you don't know the difference between a research scientist and a software designer? Really?
 
2012-08-25 01:43:06 PM

vygramul: prjindigo: Mostly bullshiat. If the material was already under-water it was already displacing the water.

In order to combine up and produce such a reinforcing magnitude we're talking about a quarter of the mass of Japan having to move. The math for cliff-slides into the ocean does NOT apply under the water. There's not enough variation in density for such to be effective and the flow would circulate around the moving mass, not directly away.

Wow - you should point that out to the so-called scientists at Cambridge.


Nothing like Monday morning quarterbacking that also implies that what happened, didn't.
 
2012-08-25 01:52:34 PM
I was deeply disappointed when I clicked on that link and found no mention of Godzilla
 
2012-08-25 02:06:18 PM

RedPhoenix122: BumpInTheNight: Ubisoft

Ahh, that's why I avoided it.

/farking draconian DRM


Get it through Steam. I don't know if the DRM is still there in Steam games but I never had a problem. Also cool game.
 
2012-08-25 02:12:46 PM

BumpInTheNight: It is literally a sandbox game.


This

Augmented Reality Sandbox 

idav.ucdavis.edu 

is literally a sandbox game.
 
2012-08-25 02:33:15 PM

Torqueknot: Get it through Steam. I don't know if the DRM is still there in Steam games but I never had a problem. Also cool game.


Sometimes it is, as in the "you can only activate on X computers before we say NO" kind of DRM.
 
2012-08-25 05:28:35 PM
i172.photobucket.com

The real reason.
 
2012-08-25 06:12:02 PM
Didn't they leave uplay in on from dust?

I know that I skipped buying it on steam because there was still some drm on it which I don't think is identified on the store page.

I believe that it had a rough release too which turned some people off, but did get enough post release support to fix up the worst offenders
 
2012-08-25 07:01:25 PM
Rosie O'Donnel dis a cannonball into the pacific?
 
2012-08-26 04:16:20 AM
Yet another reason why you don't farking build up flat coastal areas.

Here's a picture of part of my town (click for bigger). I live in the crowded little residential area in the foreground.
www.makethelist.net

Notice the lovely parks all along the ocean and around the lagoons? Those used to be crowded little residential areas too, in a town of about 23-25 thousand people. Until 1946, when a tsunami wiped them out. Then they got rebuilt and were crowded little residential areas again, in a town of 25-26 thousand people. Until 1960, when it happened again, and people got a farking clue.

In the bigger version of the image, you can see a couple round things just to the left of the lagoon - the one closer to the water is a monument to the 234 people killed in those tsunamis. Another 445 were injured between the two, and almost 2,000 buildings were destroyed or damaged.

By virtue of being a kilometer inland and 12 meters up, my neighborhood's been safe so far, but we still have to evacuate sometimes just in case. Of course, with climate change and sea-level rise, I might still end up owning beachfront property. ;)
 
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