La Palma is rumbling - What are the implications of a 40 foot Tsunami along the east coast?

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The golden neckbeard said:
Correct on the volcano not being the type

But You would hear and feel any landslide tho. People in India heard krakatoa...this would be several magnitudes that. Even in florida i would probably feel a thud
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This volcano is orders of magnitude smaller than anything like Tambora or Krakatoa. And has nothing like the potential of those volcanoes.

We are talking this volcano having a maximum VE Index of 5, whereas Tambora or Krakatoa are capable in their current states of producing VE7s in a reasonable short amount of time. The difference is a scale of 100 times IF this one even reaches VEI5. Currently the Tambora 1815 eruption is 10,000 times larger than what has currently happened on La Palma - at least.

If a repeat of earlier Krakatoa or Tambora eruptions were to happen at La Palma, there wouldn't even be much of an island left. The potential is not there, not even close.

We are talking about 1815 Tamabora releasing a whopping 50 cubic miles out of the chamber. La Palma will struggle to reach even 1/2 a Cubic Mile.

Krakatoa released a singular explosion in the climatic phase that is so ridiculously huge, so incredibly powerful that the sound wave it produced blurred the lines between what we can even define as sound and as a shockwave. It flows were so huge and so immense, the flow travelled ACROSS the top of the ocean under a blanket of ultra super heated steam 20 miles. It was an insane eruption that in modern times would kill god knows how many people through primary and secondary effects. Tambora was hell on Earth on a scale nearly an order f magnitude larger than even Krakatoa.

There is no comparison to be made. It is a Cessna versus a Boeing 747. La Palma can be many things, a Krakatoa or Tambora - not even on the scales of probability. It is zero.
 
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Since it's been a couple of pages here are the feeds:

This one has been pretty steady during the whole thing and this is the angle they use at night:

This is the feed everyone takes from if they go live and has graphs and infographics:

Also a lot of black smoke right now.
 
ColtWalker1847 said:
It takes a lot more than one in the right place. Intensity is a huge factor. That shit is logarithmic and we ain't even close to island breaking apart forces. And yes, exploding volcanoes are part of the issue. Exploding volcanoes have andesite magma that is high in silica versus low silica mafic lava that flows, well, how it's been flowing. High-silica magma acts like a plug and makes those big pointy stratovolcanoes. It increases pressures making them explodey and... wait for it... have more intense earthquakes when that magma plug shifts.
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Bearing in mind that I'm not saying the tsunami collapse idea is at all likely: This really isn't as simple a relationship as you're trying to imply. The canary islands are vulnerable to large landslides and have all suffered them in the past; this island has had several catastrophic slides over its existence, with some scant evidence that they may have caused prior tsunamis in the geological past. Los Llanos and the port of Tazacorte sit in the scar left by one of the larger slips.

There are apparent weaknesses in the island's geology that - if certain studies are to be believed - make the island vulnerable to a huge landslide with relatively little impetus. That is to say, the evidence suggests that such a landslide doesn't require the sort of earthquake magnitudes you're claiming, given that several have taken place in the past with presumably similar, or slightly more activity than we're currently witnessing.
 
What the shit said:
I’m glad we all came here to doompost about a megatsunami and now were just mesmerized by how fucking cool the volcano is.
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I've been thoroughly enjoying the night time lava streams. Very cozy, makes me want to build a firepit in my backyard or light up my fireplace to roast marshmallows. Unfortunately it's routinely a bajillion degrees where I live so that's not really an option.
 
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On the subject of a trans-Atlantic tsunami resulting from a slide, this image is taken from Glimsdal et al (2013):
Undular Bore.jpg

What's happening is the tsunami is hitting the shallow water (following weakening/dispersion across the Atlantic) and suddenly gaining height (but not force) when it hits the shallower waters of the east coast continental shelf. It's referred to as an Undular Bore.
Basically the horizontal force of the tsunami is then broken into a bunch of high-amplitude (vertical height) low-wavelength (horizontal distance) waves. Now these are locally higher, but they are much more prone to breaking (when the wave comes crashing down).

Of course, 25m waves crashing down on the beaches of the east coast is still a destructive natural disaster scenario, but not one that results in a largely unified horizontal wall of water racing 25 miles inland.
 
Fanatical Pragmatist said:
On the subject of a trans-Atlantic tsunami resulting from a slide, this image is taken from Glimsdal et al (2013):
View attachment 2576918
What's happening is the tsunami is hitting the shallow water (following weakening/dispersion across the Atlantic) and suddenly gaining height (but not force) when it hits the shallower waters of the east coast continental shelf. It's referred to as an Undular Bore.
Basically the horizontal force of the tsunami is then broken into a bunch of high-amplitude (vertical height) low-wavelength (horizontal distance) waves. Now these are locally higher, but they are much more prone to breaking (when the wave comes crashing down).

Of course, 25m waves crashing down on the beaches of the east coast is still a destructive natural disaster scenario, but not one that results in a largely unified horizontal wall of water racing 25 miles inland.
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A tsunami isn't always a big wave. In japan it was a swell of water that reached that high.

Have a look at the YouTube video of Japan. The sea just comes in and doesn't stop. The sheer force and weight of water just pushes everything over. Then when the swell receds it takes everything with it.
 
Hot Cup of Joe said:
A tsunami isn't always a big wave. In japan it was a swell of water that reached that high.

Have a look at the YouTube video of Japan. The sea just comes in and doesn't stop. The sheer force and weight of water just pushes everything over. Then when the swell receds it takes everything with it.
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That's literally the point of my post. The east coast of North America won't be like Japan.

The undular bore causes what would have been a swell with significant horizontal force to be broken up into shorter, but taller wave crests.
 
Fanatical Pragmatist said:
That's literally the point of my post. The east coast of North America won't be like Japan.

The undular bore causes what would have been a swell with significant horizontal force to be broken up into shorter, but taller wave crests.
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Isn't it more the ocean will be sucked in to the void created by the island plopping in to the sea, then the ocean rebounding back to level, causing the ocean to come inland? Vs the energy being displaced at a high amount and dissipating across the ocean?
 
Fanatical Pragmatist said:
On the subject of a trans-Atlantic tsunami resulting from a slide, this image is taken from Glimsdal et al (2013):
View attachment 2576918
What's happening is the tsunami is hitting the shallow water (following weakening/dispersion across the Atlantic) and suddenly gaining height (but not force) when it hits the shallower waters of the east coast continental shelf. It's referred to as an Undular Bore.
Basically the horizontal force of the tsunami is then broken into a bunch of high-amplitude (vertical height) low-wavelength (horizontal distance) waves. Now these are locally higher, but they are much more prone to breaking (when the wave comes crashing down).

Of course, 25m waves crashing down on the beaches of the east coast is still a destructive natural disaster scenario, but not one that results in a largely unified horizontal wall of water racing 25 miles inland.
Click to expand...
Great graphic.

There are some on here that are getting a little overly excited about the eruption. It is understandable as it is a spectacle and we just have't had anything exciting happen lately (plagues, election fraud, government shut downs, black rapper rape cases, missing (murdered) cute u-tube stars, Riot convictions, Afghanistan and the second coming of Christ (Chris).

But yes, the science only backs up a Tsunami against the East Coast under the very best of conditions for the Island; but seeing people attempting to link this eruption size to something even in the same street, neighborhood, suburb, city or country of the likes of Krakatoa is a little worrisome and a sign that some are getting swept up in the "what ifs" that are approaching levels more akin to science fiction.

The greatest loss of life from this eruption will probably be measured in lost banana lives (island has significant plantations) .
 
Fanatical Pragmatist said:
Listen buddy, the pressure from the magma build-up is going to launch the entire island 5km into the sky and back down into the ocean which will generate a 350m wave which will ackychually gain power as it races across the Atlantic destroying the entire eastern seaboard, meanwhile the worldwide magma tubes will set of a chain reaction that causes Yellowstone to go off and also the entire Pacific Ring of Fire all at once. The rapid changes to Earth's magnetic core will bring asteroids spiraling down upon us, meanwhile the elites will unleash COVID-22 which will then hybridize with the pythons in the Everglades (which are now global thanks to all the mega-tsunamis) and kill all the survivors.

You can't prove that it wont happen.
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Pictured: La Palma hurtling back to earth after landsliding off the face of the planet.
CandidCrazyAmbushbug-size_restricted.gif
 
Hot Cup of Joe said:
Isn't it more the ocean will be sucked in to the void created by the island plopping in to the sea, then the ocean rebounding back to level, causing the ocean to come inland? Vs the energy being displaced at a high amount and dissipating across the ocean?
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No, even in that scenario the energy would still dissipate across the ocean, and likely still facing the undular bore effect when it hits the continental shelf.
 
It's going off and shaking the camera, if you weren't watching now is the time:

 
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