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New volcanic isle may collapse, create tsunami: study

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Tsunami waves move at nearly the speed of sound. A 1 meter high wave moving at that speed is a lot more dangerous than a storm surge. As the tsunami wave departs the source and spreads out its height becomes less. But if the shore line of Chihijima or other land mass has a slowly sloping beach the a large inundation wave can build up. You have long time warning of a storm surge but only a few minutes for a nearby origin tsunami.

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I predict that if another volcano appeared and rock broke off 300 KM from Tokyo it would make a Tsunami! Does that make me a genius?

Comon bloody sense, you don't need to be a scientist to work this out. Stop talking about it and freaking do it... Also how about preparing for all future Tsunamis too.

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He said a rockfall of 12 million cubic meters of lava would generate a one-meter tsunami that could travel faster than a bullet train, hitting the island of Chichijima—130 kilometers away—in around 18 minutes,

Maybe this needs to be put into perspective. A Typhoon generates more than 1 meter of storm surge, which for all practical purposes is a tsunami. Chichijima gets hit by at least a couple of typhoons every year. People on typhoon prone islands learn where to live and where not to live or they drown. Even caught unawares, it would be more of an inconvenience than life threatening. There might even be the loss of a few lives if someone was swimming or wading, but the article is still an over reaction. Bottom line is you can't do anything about a volcano and you can't effectively warn people in 18 minutes.

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at 'bootht' Last time I checked rain is not measured in mL per hour as you stated...

"Here in Hiroshima when many people were sleeping I do not think anyone would believe what 200 Milaleters of rain in One hour was going to cause but that could not have been prepared For."

I think what you meant to say was 'millimetres' as in 200mm of rain per hour and THAT IS A HELL OF A LOT OF RAIN. Anyone worth their salt would know that's going to cause major problems with flooding and landslides being part of them.

This volcanic 'outburst' is just one of those cases that 'may' go sideways but not much more than close monitoring can be done because I'm sure few of the 2000 would move now if you told them to.

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I agree with you fOX and BEAR anyway something should be done soon to control what can happen.

I'm curious as to what you think that would actually be. Because 'doing something to control a volcano' is (more than) slightly beyond human capability.

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I agree with you fOX and BEAR anyway something should be done soon to control what can happen.Nature has a habit of changing what will happen and 18minutes may be all the 2000 people has if something is not done. 200,000 cubic meters of lava is a lot of heavy rock. Here in Hiroshima when many people were sleeping I do not think anyone would believe what 200 Milaleters of rain in One hour was going to cause but that could not have been prepared For. I guess what I am trying to say is that the Government needs to get off their ass an do something!

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A suggestion: Bomb one of the other sides of the top to open another area for the lava to flow from.

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Give the SFDF a little Bombing pratice. Problem solved

Far from it actually. Explosives on an active volcano? Right now the eruption is slow but steady. One bomb is all it takes to release all the pressure built up underneath the island all at once. That won't create a one-metre high tsunami. It'll be much bigger than that, and then there'll be nothing left of Chichijima.

A better solution would be to place some kind of breaker out to sea between Chichijima and Nishinoshima. That way, if the slopes do collapse and create a tsunami, the breaker can disrupt the tsunami, causing the wave to pass either side of Chichijima. Something like that should be less expensive than using explosives, unless you want to go nuts with the breaker.

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If it is Posable it will happen so use Murphys Law! IF ANYTHING CAN GO WRONG IT WILL!!! If any place would need to be evacuated to keep people safe, Then do it now!! because Hind sight it this case is we should have evacuated not if we did maybe 2000 people would be alive. Do not be stupid send these people on vacation. And deal with it just like as it could be an Avolanch of Snow in the sky slopes. Give the SFDF a little Bombing pratice. Problem solved

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How long until China claims this one their own?

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we are thinking of consulting with earthquake prediction experts…

Glad to hear they're on the ball.

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I am sure that if Robin Williams hasn't said it, he would have, "Volcanoes are earth's zits". This 'zit' is one paticuluarly nasty one, "80 Olympic swimming pools" worth of 'daily discharge' is nasty. Someone might want to keep an eye on that...

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