How far inland can a tsunami go?? | |
The Professor User ID: 96357 Ireland 05/21/2006 10:16 PM Report Abusive Post Report Copyright Violation | |
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Anonymous Coward User ID: 96361 United States 05/21/2006 10:39 PM Report Abusive Post Report Copyright Violation | There is a institute out on the west coast that studies them. Can't recall their name. They should know if you can google and find out their name. IMO, it may go far inland but I think it would stay in the river and stream valleys and lowlands not just cover everything in sight that far inland. |
Obake User ID: 87894 United States 05/21/2006 10:45 PM Report Abusive Post Report Copyright Violation | Also, normal waves break in water that is half as deep as they are tall....thus a 10ft wave starts to break in five foot water. That's why all of us surfers paddle way out into the line up to get out of the way of the "shorebreak"....the shorebreak is the hardest thing to deal with.....look at how it reacts on a big day and you'll see the above principles more clearly. |
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Patrick25 User ID: 95716 Canada 05/21/2006 10:59 PM Report Abusive Post Report Copyright Violation | Any "previous" tsunami debris you think you saw wasn't that! It would have eroded away before the hundreds of years of history we have kept. A tsunami could technically go all the way around the world if it was generated by something big enough (I don't think anything that powerfull can happen though...unless you believe in planet x). Think about it... the largest earthquake ever recorded was 9.6mag I think. You saw what a 9.x earthquake does in terms of tsunamis on Dec 26th 2 years ago..it was what..about 20 feet high in some instances and went about 2km inland. If mount everest fell into the ocean it still wouldn't engulf the entire earth...you'd need something like the moon hitting us at 20km/s....actually, we'd probably turn into liquid/molten rock before a tsunami could form. For a 10mag earthquake to happen there would have to be a fault that goes all the way around the globe (and there's none). So if you're 10km+ away from the coastline, I wouldn't worry about tsunamis. |
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Anonymous Coward User ID: 78991 United States 05/21/2006 11:24 PM Report Abusive Post Report Copyright Violation | Do not believe that all of florida ( whole state ) would be washed over by a wave... NO WAY - maybee 1 mile at most inland from coast no matter how "tall the wave " |
Patrick25 User ID: 95716 Canada 05/21/2006 11:35 PM Report Abusive Post Report Copyright Violation | Don't forget the speed and energy carried in the wave. - regardless of size, once it runs out of forard momentum, it will stop advancing too. Many factors affect how far inland it can go, but I think one save assumption is that the energy required (the size of the event) has to be exponentially bigger as the wave gets more and more inland. ie: perhaps a a 1km asteroid will cause a wave to go 2km inland. a 2km asteroid will cause a wave to go 2.2km inland. (those aren't real numbers..just showing the train of thought). |
Anonymous Coward User ID: 84331 United States 05/21/2006 11:40 PM Report Abusive Post Report Copyright Violation | RE: 94054..I think you're right..just wnt to Kentucky and back today,(I live in North GA)..saw what I interpret as Tsunami Debris in KY...looks about the same as here in N.GA...Kinda scary if you think about it. Where in Ky do you think you saw something like this? Did you travel I-75??? Just like to know since I live somewhere in that neck of the woods ;) There are documented ancient impact sites in Ky [link to www.uky.edu] Maybe something you saw was because of this? Middlesboro is actually built in the center of one of the impact sites. |
Anonymous Coward User ID: 94054 United States 05/21/2006 11:40 PM Report Abusive Post Report Copyright Violation | I forget the location but it's a very elevated wall. (like sea level to 5-6k alt) That wall shows proof of a 600ft+ tall wave and dates back thousands of years. Scientist were speculateing and studying it, once thought to be 'the' comet that caused extinction. But some evidence proved it wasn't that. |
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Anonymous Coward User ID: 96358 Portugal 05/22/2006 12:30 AM Report Abusive Post Report Copyright Violation | If I remember well, the tsunami caused by the Krakatoa volcan explosion, at the end of the 19th century, produced waves that have left at least a large ship 10km inland. "The 1883 eruption of Krakatoa is among the most violent volcanic events in modern times (a VEI of 6, equivalent to 200 megatons of TNT - about 13000 times the yield of the Little Boy bomb which devastated Hiroshima, Japan). Concussive air waves from the explosions travelled seven times around the world, and the sky was darkened for days afterwards. Waves from the tsunamis were recorded as far away as the English Channel." [link to en.wikipedia.org] |
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Anonymous Coward User ID: 94722 United States 05/22/2006 12:39 AM Report Abusive Post Report Copyright Violation | The height will also depend on the immediate geology of the shoreline. It's different for where the ocean bottom gradually slopes upwards towards the shore than where it is a long flat plain towards the shore and than where it is a sudden rise towards shore. Because of this it's important to evaluate specific areas that you're concerned with. Hit the googlemonster! |
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Mack User ID: 58713 United States 05/22/2006 04:14 AM Report Abusive Post Report Copyright Violation | More than two miles inland I wouldn't sweat it, unless it's an asteroid fall. When the dinos bought it back in the Cretaceous the wave from the Gulf of Mexico impact deposited screes of large car size boulders for three hundred miles inland. That was a bad one, maybe a half mile high and moving fast as a cruising jetliner. |
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Patrick25 User ID: 95716 Canada 05/22/2006 04:17 AM Report Abusive Post Report Copyright Violation | Yes but the one that killed off the big lizards was 65km wide. Rocks like that don't exist anymore in close proximity to earth. They've all impacted something or swung to the far reaches of the solar system. No way a 1km asteroid would engluf the earth in water from a tsunami. If you're more than 10km from the beach, you're fine no matter what hits us. (tsunami wise anyways). |
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