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How far inland can a tsunami go??

 
??
User ID: 91873
United States
05/21/2006 10:12 PM
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How far inland can a tsunami go??
How far inland can a 100feet tsunami go ??
The Professor
User ID: 96357
United States
05/21/2006 10:16 PM
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Re: How far inland can a tsunami go??
As far as a 200 foot mountain. OR, untill it runs out of 'steam', LOL.

Got one between you and the coast ?
Anonymous Coward
User ID: 94054
United States
05/21/2006 10:16 PM
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Re: How far inland can a tsunami go??
Depends on how large it is. Virtually, if it's large enough it could go around the world.


IF the volcano cave out in the Atlantic and drops the 1000ft + side in like many suspect, my guess is to the edge of ohio.
Anonymous Coward
User ID: 96354
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05/21/2006 10:22 PM
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Re: How far inland can a tsunami go??
tsunamis have feet? beer2
Anonymous Coward (OP)
User ID: 91873
United States
05/21/2006 10:24 PM
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Re: How far inland can a tsunami go??
I heard that its stop after bout 20mil
Anonymous Coward
User ID: 505
Canada
05/21/2006 10:28 PM
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Re: How far inland can a tsunami go??
We'll find out next week popcorn
Innocentwolf15

User ID: 29740
United States
05/21/2006 10:29 PM
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Re: How far inland can a tsunami go??
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.
Anonymous Coward
User ID: 96343
United States
05/21/2006 10:31 PM
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Re: How far inland can a tsunami go??
i would think it depends on elevation . im minutes away from a 2132 ft summit here in the pocono pa area
Anonymous Coward (OP)
User ID: 91873
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05/21/2006 10:36 PM
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Re: How far inland can a tsunami go??
i think there was 100 ft tsunami in december than went 5 km
Anonymous Coward
User ID: 96361
United States
05/21/2006 10:39 PM
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Re: How far inland can a tsunami go??
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
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05/21/2006 10:45 PM
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Re: How far inland can a tsunami go??
Depends on the force behind the wave....the worst thing is, displacement creates a series of waves all of which push the water farther and farther onshore. Hollywood shlock has created the image of tidal waves as singular events....they come in break and wash out.....this is not true. Look at the videos from the tsunami last year. Tsunami waves caused by displacement.... undersea landslide, meteor splash, earthquakes create mulitple waves....the waves break on shore, create white water and rush forward.....the whitewater piles up and gets pushed by more waves, the outrushing water rips and gets pushed forward....etc....

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.
banditaa
User ID: 96366
United States
05/21/2006 10:46 PM
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Re: How far inland can a tsunami go??
they found whale bones in a mountain from some "previous" tsunami.....
Anonymous Coward
User ID: 96343
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05/21/2006 10:47 PM
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Re: How far inland can a tsunami go??
charlie
Patrick25

User ID: 95716
Canada
05/21/2006 10:59 PM
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Re: How far inland can a tsunami go??
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.
Patrick25

User ID: 95716
Canada
05/21/2006 11:00 PM
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Re: How far inland can a tsunami go??
96366:

That was probably whale bones from ancient times (ie: not bones anymore but fossils) from a time when that area was covered in ocean.
Anonymous Coward
User ID: 78991
United States
05/21/2006 11:24 PM
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Re: How far inland can a tsunami go??
Depends on the LENGTH of the RISE IN WATER - no matter how HIGH it is.... all depends on length of the rise in water not how high it is....

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 "

wall
Patrick25

User ID: 95716
Canada
05/21/2006 11:35 PM
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Re: How far inland can a tsunami go??
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
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Re: How far inland can a tsunami go??
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.

peace
Anonymous Coward
User ID: 94054
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05/21/2006 11:40 PM
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Re: How far inland can a tsunami go??
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.
Anonymous Coward
User ID: 84331
United States
05/21/2006 11:54 PM
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Re: How far inland can a tsunami go??
Were you on the beaten path (I-75) or somewhere in the southeast of KY?

Just curious, the Appalachians actually start on the back east of our property. Kinda like built in mega tsunami protection ;)

peace
Anonymous Coward
User ID: 505
Canada
05/22/2006 12:01 AM
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Re: How far inland can a tsunami go??
The question I ask is how fast do I have to be to outrun it,Im on the coastline and I think we have about 6hrs max depending on where it hits.
Patrick25

User ID: 95716
Canada
05/22/2006 12:08 AM
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Re: How far inland can a tsunami go??
6 hours is PLENTY of time. You could be 500km+ away by that time.
Anonymous Coward
User ID: 96358
Portugal
05/22/2006 12:30 AM
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Re: How far inland can a tsunami go??
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]
Anonymous Coward
User ID: 96358
Portugal
05/22/2006 12:33 AM
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Re: How far inland can a tsunami go??
A very good page:

KRAKATAU, INDONESIA (1883)
[link to www.geology.sdsu.edu]
Anonymous Coward
User ID: 94722
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05/22/2006 12:39 AM
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Re: How far inland can a tsunami go??
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!
KittyLove

User ID: 89397
Japan
05/22/2006 12:41 AM
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Re: How far inland can a tsunami go??
*hoping the large mountain area keeps her safe in her lil spot in japan*

hah riiiiiiiiiiight / i wont say it i wont say it (refrains from saying WE'RE DOOOOOOOMED)
Mack

User ID: 58713
United States
05/22/2006 04:14 AM

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Re: How far inland can a tsunami go??
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.
Nancy Nebulous
User ID: 65005
United States
05/22/2006 04:16 AM
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Re: How far inland can a tsunami go??
It can go pretty darn far, in my opinion.
Patrick25

User ID: 95716
Canada
05/22/2006 04:17 AM
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Re: How far inland can a tsunami go??
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).
Anonymous Coward
User ID: 65005
United States
05/22/2006 04:26 AM
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Re: How far inland can a tsunami go??
Surfs up
Mack

User ID: 58713
United States
05/22/2006 04:34 AM

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Re: How far inland can a tsunami go??
Yeah Patrick, that's mostly right. Eros is about the same size as the Cretaceous impactor, but it's not on a collision course. If anything strikes in our lifetime it will likely be pretty small, maybe only as large as a house.

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