Monster waves

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ed
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Monster waves

Post by ed »

It is common for mid-ocean storm waves to reach 7 meters (23 ft) in height, and in extreme conditions such waves can reach heights of 15 meters (49 ft). However, for centuries maritime folklore told of the existence of vastly more massive waves — veritable monsters up to 30 meters (98 ft) in height (approximately the height of a 10-story building) — that could appear without warning in mid-ocean, against the prevailing current and wave direction, and often in perfectly clear weather. Such waves were said to consist of an almost vertical wall of water preceded by a trough so deep that it was referred to as a "hole in the sea"; a ship encountering a wave of such magnitude would be unlikely to survive the tremendous pressures of up to 980 kPa (142 psi)[citation needed] exerted by the weight of the breaking water, and would almost certainly be sunk in a matter of minutes.

Many years of research have confirmed that waves of up to 35 meters (110 ft) in height are much more common than mathematical probability theory would predict using a Rayleigh distribution of wave heights. In addition, pressure readings from buoys moored in the Gulf of Mexico at the time of Hurricane Katrina also indicate the presence of such large waves at the time of the storm. In fact, they seem to occur in all of the world's oceans many times every year. This has caused a re-examination of the reason for their existence, as well as reconsideration of the implications for ocean-going ship design.
http://en.wikipedia.org/wiki/Freak_wave

Scarey stuff. Like, nightmareish
Last edited by ed on Thu Oct 30, 2008 9:54 pm, edited 1 time in total.
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hammegk
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Post by hammegk »

Discovery Channel or some such has a nice documentary on the subject.

Scary shit is right. Interesting enough, wave models based the Schroedinger equation show the effect. Basically a wave steals energy from the waves that surround it.
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Post by EvilYeti »

Could explain lots of the 'Bermuda triangle' mysterious ship disappearances.

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Fix the fuggin link.

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Post by Evolver »

Crap.
I thought we were going to see things like this:
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Post by Bruce »

DUDE!! KILLER WAVE!!

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Post by sparks »

EvilYeti wrote:Could explain lots of the 'Bermuda triangle' bullshit woo .
There. Fixed that for ya. :)
Last edited by sparks on Thu Oct 30, 2008 10:52 pm, edited 1 time in total.
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Post by EvilYeti »

sparks wrote:
EvilYeti wrote:Could explain lots of the 'Bermuda triangle' bullshit woo disappearances.
There. Fixed that for ya. :)
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Geni
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Re: Monster waves

Post by Geni »

ed wrote: http://en.wikipedia.org/wiki/Freak_wave

Scarey stuff. Like, nightmareish
The use of the phrase "Rayleigh distribution" in cold blood? pretty much.

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Post by En folkefiende »

hammegk wrote:Discovery Channel or some such has a nice documentary on the subject.

Scary shit is right. Interesting enough, wave models based the Schroedinger equation show the effect. Basically a wave steals energy from the waves that surround it.
Both water and airborn waves are highly nonlinear, and you have to assume energy coupling.

Rayleigh just doesn't cope. Nasssty problem,too.
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Post by EvilYeti »

jj wrote:
Both water and airborn waves are highly nonlinear, and you have to assume energy coupling.

Rayleigh just doesn't cope. Nasssty problem,too.
Can you perceptually encode a water wave? So you can get all the lethality at 1/10th the size?

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Post by eli54 »

My boss has a photo from the cockpit of his 50 foot motor yawl showing nothing but a wall of water on a trip "uphill" on the west coast of Mexico. For hours.
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Post by EvilYeti »

eli54 wrote:My boss has a photo from the cockpit of his 50 foot motor yawl showing nothing but a wall of water on a trip "uphill" on the west coast of Mexico. For hours.
Are sure this is the same thing and not some weird tidal or El nino effect?

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Post by sparks »

Love to see that photo/video. As far as blaming El Nimrod, no worries. He's outta office in a month or so!!
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Post by robinson »

YouTube has multiple videos of Freak Waves hitting ships, even one of an offshore break.


Cruise ship nailed


Crab ship nailed


100 foot (?) monster captured by surfers


My favorite, clip stops when water smashes through the bridge windows

There are more. Some argue that they are not Freak waves, just big waves.

Considering that until 1995 "scientist" refused to believe in Freak waves at all, I don't listen to skeptics when they dismiss stuff they know nothing about.

Thousands of years of actual sailors, you know, people who actually sailed around on the ocean, for thousands of years they told about freak waves, and the terrible losses from them. Scientist refused to believe. They didn't just dismiss the entire history of eye witness accounts of them, they refused to believe it could even happen. It was a myth.

Last night I showed the clip of the cruise ship getting nailed, and was told that it wasn't a freak wave. Skeptics, even when you show them video, they think it is faked.


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oh really?

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Post by robinson »

In Daytona beach a freak wave actually hit the beach at night. Estimated to be 10 feet high (nobody actually knows), it was awesome.

Just one wave, out of nowhere, bam, chaos, then gone.

It was freaky. Scientist refuse to believe it, because nobody got a picture of it.
oh really?

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Post by Geni »

robinson wrote:YouTube has multiple videos of Freak Waves hitting ships, even one of an offshore break.


Cruise ship nailed
Questionable if big enough to count.

100 foot (?) monster captured by surfers
Closeness to shore means that status as a freak wave is questionable. Cortes Bank for example generates very big waves but they don't count as freak waves.
Considering that until 1995 "scientist" refused to believe in Freak waves at all, I don't listen to skeptics when they dismiss stuff they know nothing about.
More that they felt they lacked the evidence that they could use to conclude they existed. Draupner wave was the first actual solid bit of evidence.
Thousands of years of actual sailors, you know, people who actually sailed around on the ocean, for thousands of years they told about freak waves, and the terrible losses from them. Scientist refused to believe. They didn't just dismiss the entire history of eye witness accounts of them, they refused to believe it could even happen. It was a myth.
Sailors also reported a lot of mermaids.
Last night I showed the clip of the cruise ship getting nailed, and was told that it wasn't a freak wave. Skeptics, even when you show them video, they think it is faked.
OR highly questionable if the wave is actualy big enough to qualify. 15 meters high storm waves are not freak waves.

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Post by ed »

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Post by robinson »

Geni wrote: Closeness to shore means that status as a freak wave is questionable. Cortes Bank for example generates very big waves but they don't count as freak waves.
Thanks Geni. When I tell people about this sort of thing, they tend to not believe it. No, not freak waves, that "scientist" actually refuse to believe stuff. It's not like they go "Hmm, if that is true, it is an interesting event, worth investigating. Especially of the stories of damage and sinking of ships is involved. A terrible financial and human loss."

No, they go, "Doubtful. Impossible. Just myths." And then do no investigating at all. Which isn't science of course, it is something else.
Geni wrote: More that they felt they lacked the evidence that they could use to conclude they existed. Draupner wave was the first actual solid bit of evidence.
Which illustrates the reason many people distrust and are skeptical of "scientist". Rather than investigate, try and discover the truth, they make claims with no evidence at all. And even worse, they use horrible reasoning to try and defend their stupidity.

A damaged ship, lives lost, and multiple eye witness accounts of a terrible freak wave that caused the event, IS evidence. Thousands of such reports, from all over the world, for thousands of years, is the kind if evidence people who live in reality understand.
Geni wrote:
Thousands of years of actual sailors, you know, people who actually sailed around on the ocean, for thousands of years they told about freak waves, and the terrible losses from them. Scientist refused to believe. They didn't just dismiss the entire history of eye witness accounts of them, they refused to believe it could even happen. It was a myth.
Sailors also reported a lot of mermaids.
See? Using a horrible fallacy like, "Sailors also reported a lot of mermaids.", to shore up a claim is stupid. It is the sort of reasoning I mock people for.

That isn't an argument, a logical reason, or even close to scientific.

One could, if one was so inclined, use that sort of fallacy to dismiss everything else sailors reported, that you have no evidence for.

So just stop it.

I mentioned the Daytona Beach wave, because it is about as solid a fact as one can find in the US, in recent history.

You can find the event listed by NOAA here
http://www.erh.noaa.gov/phi/reports/tsunami.htm

The event, which actually occurred, still baffles "scientist". A 27 mile long wave, from 10 to 20 feet high, (nobody is sure), smashed into a heavily populated beach area, at night. It swamped the fireworks barge, canceling the next evenings firework display. (The barge was anchored well offshore)

It injured at least 75 people, 20 of them needing emergency medical attention. It rushed up over 70 feet past the high water mark, smashing people into concrete seawalls, damaging beach equipment, smashing hundreds of cars and instilling sheer terror in those caught up in it.

For those not familiar with Daytona Beach, this was the night before the Fourth of July. The place was packed with party people, setting off fireworks on the beach. And doing other stuff. The ocean was flat. (This means no waves to speak of).

Nobody knows what caused the wave. The theory that it was an undersea landslide is not supported by seismic evidence, and the sea bottom there is very flat sand, no cliffs or other geology that lends itself to undersea slumping.

If it was a Tsunami, that doesn't change the facts. A really big freak wave hit the coastline with no warning, and it came out of nowhere. That is the definition of a freak wave.

Nobody knows what caused it. It was freak wave. There are historic reports of the same event on other beaches around the world.

To say nothing of the huge waves at sea.

It's freaky man.

It also happened before the 1995 "evidence" that convinced scientist freak waves existed.
Last edited by robinson on Fri Oct 31, 2008 4:26 pm, edited 1 time in total.
oh really?

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Post by robinson »

What is even more freaky, is the giant waves of 1962.
North of Fort Lauderdale, in March of 1962, huge mysterious waves just started pounding the beach, scaring the living shit out of everybody who saw them.

Locals know waves well, and these were not a swell, not regular waves at all. And the rest of the coast did not get them. There was no swell, not even any conditions out at sea that could generate big waves.

What the hell caused them?

Going back to the Daytona Beach wave, guess what was reported by more of them "stupid sailors" who were out at sea shrimping that night? Off the coast of Daytona Beach?

The sailors, who didn't know about the Daytona Beach wave, reported being almost swamped by huge sudden swells. For those not familiar with a shrimp boat, it is built sort of like a tug, and made to withstand heavy seas, they are tough hard to sink boats. The sailors on them are tough no nonsense seamen. Well familiar with the ocean they are out on every night.

So what is the freaky part? They reported a huge splash in the distance, then giant swells (waves out as sea) that almost destroyed their boat. The story ran on the local news.

What the hell?
oh really?