Would a comet the size of "Biedermann," about 1 mile wide, cause a tsunami that big, going in all the way to Ohio and Tennessee? I know that comet impacts cause huge waves, but I was wondering if the magnitude is correct.

Try the Simulating of Armageddon on Your Computer :



Quote:


Meteor Crater Arizona
was a small scale meteor about 150 feet across but crater is approximately 180 meters deep with a rim that rises 30 to 60 meters , a blast stronger than some of the most powerful nukes

what about near misses?
As recently as 1996, a small asteroid about a third of a mile wide passed within 280,000 miles of Earth — a hairbreadth by astronomical standards. It was the largest object ever observed to pass that close, and had it hit, would have caused an explosion in the 5,000-to-12,000-megaton range.

That tsunami would be able to travel long distances on the sea. It was approximately 1.5 km high (comparing with the WTC, which is engulfed by it in the movie), travelling at 3x the speed of sound. That mass of water would flatten everything on the shore line, advancing some miles inland, until it lost momentum. But somebody has to prove me that it would go further than a few miles into the continent.

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This probably belongs in bad tv/bad movies, but I agree with you. I doubt that the wave would travel more than a few miles. Even crediting it as being a mile high, it's quite some way over fairly rough terrain to the appalachain mtns. A couple hundred miles around that point I believe. It sure as heck isn't gonna get PAST the mtns.

Consider the La Palma megatsunami. In the event that it happens, 500 billion tons of rock and debris will plunge into the ocean, pushing up an unimaginably large wall of water that will race towards the U.S. east coast at around 450mph per hour. Even when it hits, it will only affect the easternmost twelve or so miles of the country. It's doubtful that the fictitious comet will produce larger devastation.

8-[

This is all well and good, but... well... Some of us live on the coast. It's nice to know that all you people get to live, but...umm... Well, let's just say I'd rather it were me than you.

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Ut, one cannot get any more coastal than I am. I share in your terror. :wink:

I'm sure TriangleMan's going to love this, too.

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"Isn't that just...bread?"

For me, here in Wyoming....

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In addition to that, the tsunami wouldn't be that fast, according to the BA. The wave height increases by a huge amount, but the speed also falls to "only" a hundred kilometers per second. But on the other hand, we might be underestimating the fury of a comet impact.

That sounds a wee bit quick. I'd hate to be hit by the wave going c/3.

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"I'm making wheatloaf. It's like meatloaf, only with wheat"
"Isn't that just...bread?"

Wow... shows how stupid I can be at times. I meant "a few hundred kilometers per hour."

If you want to work the numbers refer to
http://personals.galaxyinternet.net/tunga/

There is still large variation in predicted impact driven tsunami models among experts. H. J. Melosh precently published that predicted waveheight is currently overestimated because (1) an impact induced tsunami will have a shorter wavelength than an earthquake induced tsunami, & (2) wave harmonics significantly dampen waveheight for an impact induced tsunami. This is based on early atomic bomb underwater testing.

Personnally, I don't think you need to be worried about a tsunami in the nation's midsection from a 1-mile diameter comet. Although if it happened to hit in the middle of Lake Michigan, it might produce some unusual effects.

Asteroid impact coming our way ?

http://news.independent.co.uk/world/...p?story=611219

:-?

No. Close but no cigar, er, impact.

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If 300 meters wide asteroid is "giant" I wonder what 300 km wide asteroid is .
But on the other hand, this large Earth-grazing asteroid is scary!

I read somewhere that the number of people actively involved in tracking NEOs is equivalent to that of an average sized branch of McDonalds

So one comet induced catastrophe - do you want fries with that and is that sit in or to go :P

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