The stuff from Sci-fi

[ShorelineJohn]

I thought we would be zapped from radiation or all float of the earth, I mean don't they have to go down there and set off a couple of nukes to get it going again.
The mysterious iron ball at the center of the Earth may have stopped spinning and reversed direction

The mysterious iron ball at the center of the Earth may have stopped spinning and reversed direction (msn.com)

Multidecadal variation of the Earth’s inner-core rotation | Nature Geoscience

[Jim Mahan]

I had a couple of semesters of geology in the nineties and I'm pretty sure these experts doing cutting edge science are wrong.

They're too close to the tech and losing sight of the bigger picture. This ball has been spinning for four point six billion years and the core has been separate from the mantle and crust and spinning loosely for all that time, creating thermal vortices in the mantle and driving the big continental plates and stuff. That's four and half billion times around the sun, with the moon and other stuff going around at the same time, and all of that spinning and rotating is a result of the spinning of the original star that supernovaed and left the debris that became our solar system, which is in turn a function of the larger and longer rotation of the galaxy itself. Nothing is going to slow that **** down. So they're wrong, I just know it. I mean, it's a really, really, big ball of nickel-iron. It's gonna take some serious energy to change it's rate of rotation.

These young so-called science professors probably think they're pulling the wool over our eyes, and they're just after more funding so they don't have to do any real work.

Trolling CWSmith.

[Hugh MacD]

I'd really like to see the actual science behind the reports. This sounds, to me, like the press (even Science) misinterpreting data and MSN going along for the ride. Like Jim, I had some Geo (four years, but only as a minor and little exposure to geophysics, so I'll qualify my knowledge level as "low", with the further addendum that it was fifty years ago I was of the belief that the nickel/iron core was what generated our magnetic field and that id does ​invert periodically, but that is on more of a 60K year cycle. Mr. Smith? Please correct me if I'm all wet!

[Jim Mahan]

Is there such a thing as an emoji for being facetious? Asking for a friend.

[john welsford]

I had a couple of semesters of geology in the nineties and I'm pretty sure these experts doing cutting edge science are wrong.

They're too close to the tech and losing sight of the bigger picture. This ball has been spinning for four point six billion years and the core has been separate from the mantle and crust and spinning loosely for all that time, creating thermal vortices in the mantle and driving the big continental plates and stuff. That's four and half billion times around the sun, with the moon and other stuff going around at the same time, and all of that spinning and rotating is a result of the spinning of the original star that supernovaed and left the debris that became our solar system, which is in turn a function of the larger and longer rotation of the galaxy itself. Nothing is going to slow that **** down. So they're wrong, I just know it. I mean, it's a really, really, big ball of nickel-iron. It's gonna take some serious energy to change it's rate of rotation.

These young so-called science professors probably think they're pulling the wool over our eyes, and they're just after more funding so they don't have to do any real work.

Trolling CWSmith.

Next month I am expecting a visit from a University professor who teaches Structural Tectonics at a German University, I'll ask her whats up.

John Welsford

[ShorelineJohn]

This does not seem to be coming from a bunch of flat earthers, nor is it predicting the sky is falling. The work has been peer review and the author would seam to have real credentials.
https://orcid.org/0000-0002-5932-6916

https://scholar.google.co.uk/scholar...subj=all&hl=en

I saw a quote from a professor from Berkeley saying he believes it will be proven wrong, but nobody laughing.

[Peerie Maa]

Well, there is this:

The magnetic field of the Earth, and of other planets that have magnetic fields, is generated by dynamo action in which convection of molten iron in the planetary core generates electric currents which in turn give rise to magnetic fields.^[13] In simulations of planetary dynamos, reversals often emerge spontaneously from the underlying dynamics. For example, Gary Glatzmaier and collaborator Paul Roberts of UCLA ran a numerical model of the coupling between electromagnetism and fluid dynamics in the Earth's interior. Their simulation reproduced key features of the magnetic field over more than 40,000 years of simulated time and the computer-generated field reversed itself.^[36][37] Global field reversals at irregular intervals have also been observed in the laboratory liquid metal experiment "VKS2".^[38]
In some simulations, this leads to an instability in which the magnetic field spontaneously flips over into the opposite orientation. This scenario is supported by observations of the solar magnetic field, which undergoes spontaneous reversals every 9–12 years. However, with the Sun it is observed that the solar magnetic intensity greatly increases during a reversal, whereas reversals on Earth seem to occur during periods of low field strength.^[39]

https://en.wikipedia.org/wiki/Geomagnetic_reversal

Which could lead to this:

Earth’s magnetic poles could start to flip. What happens then?


As Earth's magnetic shield fails, so do its satellites. First, our communications satellites in the highest orbits go down. Next, astronauts in low-Earth orbit can no longer phone home. And finally, cosmic rays start to bombard every human on Earth.
07 December 2018
By Jonathan O'Callaghan

This is a possibility that we may start to face not in the next million years, not in the next thousand, but in the next hundred. If Earth’s magnetic field were to decay significantly, it could collapse altogether and flip polarity – changing magnetic north to south and vice versa. The consequences of this process could be dire for our planet.
Most worryingly, we may be headed right for this scenario.
‘The geomagnetic field has been decaying for the last 3,000 years,’ said Dr Nicolas Thouveny from the European Centre for Research and Teaching of Environmental Geosciences (CEREGE) in Aix-en-Provence, France. ‘If it continues to fall down at this rate, in less than one millennium we will be in a critical (period).’
Dr Thouveny is one of the principal investigators on the five-year EDIFICE project, which has been running since 2014. Together with his colleagues, he has been investigating the history of Earth’s magnetic field, including when it has reversed in the past, and when it might again.

https://ec.europa.eu/research-and-in...t-happens-then

[sp_clark]

The World Turned Upside Down has happened before, will likely happen again.

Maybe this purported phenomenon has something to do with it?

Maybe not....

[Jim Mahan]

The study of geology is fraught, fraught, I say, with contention over new theories. It's been known for a long time that the magnetic field reverses polarity. Evidence is in the formation of new crust at the edges of the deep ocean tectonic plates where new upwelling mafic magma, with low viscosity compared to continental magma, forms new rock as the plates move apart, and magnetic grains in the horizontal layering align with the polarity of the magnetic field of the planet, and stay that way as the fluid rock freezes in place, and the polarity of the grains visible in the solid rock on either side of the rift changes back and forth in a pattern over time.

One of the things I like about science is how new ideas get serious pushback, but the whole point of science is to get new info that supercedes, and of logical necessity, replaces old ideas. Alfred Wegner, the guy who came up with the notion of plate tectonics was thought to be a fool and wrong about it, and part of what led him to his discovery was the obvious similarity of coastlines between continents, how the east coast of South America matches the west coast of Africa. Which of course the world of science was familiar with, but lacked a clue about the mechanism behind it. "The Earth's continents rest on giant plates that move apart? Al you're nutz! And you call yourself a scientist. GTFOOH, and let us real scientists work. Continental plates that move. hahahaha..." And of course now it's a mainstay of geology. Along with the periodic magnetic pole reversals is the fact that the map location of the Earth's magnetic poles also move in precession in long cycles as the Earth's axis fluctuates, that drove early map makers to contention.

The movement the scientists suggest in their current study is only tiny by tabletop standards, fractions of a millimeter per year. Measuring it's on the order of these recent space telescope discoveries of planets transiting stars in galaxies ten billion years ago and that far away. They're analyzing the differential between seismograph traces in pairs of seismic waves travelling through the mantle and core from one side of the planet to the other, and some of the data they are analizing comes from measurements taken as far back as the sixties. And Wegner's theory was only acknowleged by geologists around then.

To me the most exciting thing in science currently is how AI is being used to spot patterns in existing ginormous data sets, that would take human analysis decades or never to discover. Which is, among other things, why I volunteered to answer a comprehensive health survey as part of a study called 'the million veteran program—MVP.' It provides a huge data set that medical researchers can use to extrapolate all kinds of things that may not even be on the radar at the moment, which can help lead to things like a cure for cancer or alzheimers.

[ShorelineJohn]

I believe this is the 1996 work.
chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://agupubs.onlinelibrary.wiley.com/doi/pdfdirect/10.1029/97RG01285

As far as I understand it is part of the proof that it moves at all (1 degree a year).

[ShorelineJohn]

And I would think the slowing down, stopping and reversing direction is really just it fluctuating above and below the speed of the earth's rotation. 0.000694 RPM

This is also why I don't argue about global climate change. If it's not your life's work one's understanding of it might be skewed.

[ShorelineJohn]

https://www.msn.com/en-us/news/techn...e0c72885e04d3f

Even more, this is what real science looks like, sorry if it interferes with the one's notion of a huge spinning magneto spinning down there. The movie "The Core" is just not science, this is.

[Sandlapper]

I had a eureka moment in the 1950's when a college prof introduced me to plate tectonics. OF COURSE, why did it take so long to know this simple answer to geology which was there all of earth's history?

Since then, I have been following this material with the brain power than I was allotted and am able to see much of geologic discoveries since then. Most people hear that the earths magnetic field reverses now and again with a "relatively" fixed time period. The error that many make is that they think the earth's core direction of rotation must also reverse.

That is incorrect and the field rotation DOES NOT require that the core reverse its rotation. That reversal can and probably can be satisfied by a much simpler change that does not need a change in the moment of the core. Such a change can be inferred by the action of a gyroscope and other rotating devices.

Observe a rotating ball and note the direction of its surface. Allow the ball to rotate 180 degrees transverse to its original alignment. No energy is lost or gained in this movement. The big difference is that the surface of the ball is now rotating opposite to the original direction. If the ball was a magnet, its magnetic field has also been reversed opposite to the original direction. This action does not require that the ball change its direction of rotation, only that it appear to do so to by an observer in the nearby area. While this simpler explanation occurred to me independently, I feel that it must be known by the scientific community at large.

I saw the direct evidence of magnetic field reversal in the 1960's during the laying of the first working trans-Atlantic cable.

Such a field reversal surely makes for huge changes in many things that depend on constancy of the earth's magnetic field. In actuality, if the major change is very rapid, most of will not notice and we will go on as before. It does appear that the reversal will not be abrupt in all areas of the earth at once and some effects may be seen as locally more severe than others.

There is far more to this to be studied but the recent call for reversal of mass rotation of the core is way out of line for a scientific study.

[ShorelineJohn]

The core did not reverse direction or stop in relationship to anything else but us. And nobody is trying to say anything like that. The core and the crust rotate in the same direction at close to the same speed, the core was rotating at .000694 + some very small number while the crust was rotating at .000694 RPM. Now the opposite may be true. My point is that when explained to laymen before and proved in 1996 by the same person, people imagined a inner core spin many times faster than the earth (with 1000 of miles per hour difference where they meet) creating a huge magneto like a machine we would create. As for the magnetic field, that's for them to explain not me.

I have long said that when Galileo said the earth goes around the sun it wasn't Church he was fighting it was "common sense". To the observer the sun comes up on one side and goes down on the other, everyday. The general public must of been laugh their butts off!

Yes I know the history is much more involved than that (and I can google it too) but the point is "common sense" has no place in science.

[AndyG]

The core did not reverse direction or stop in relationship to anything else but us. And nobody is trying to say anything like that.

Very much This.

And then this, if you fancy your mind melted...



Rotational dynamics are weird, compared to what we're used to.

Andy

[AndyG]

....it's stable in two directions of rotation, no angular momentum lost (except to minimal friction with the air over time).

Weird, but OK.

Andy

[ShorelineJohn]

That's a great video.
I also liked the "intuitive explanation" in this one.


That's intuitive? I'm just glad the conclusion is the earth is not going to flip over.

[ShorelineJohn]

So now this popped up yesterday, probably due to things I have been googling, but I won't even go that far as Google keeps their algorithms very secret.

https://www.msn.com/en-us/news/techn...f02207adfff958

Now it is really hard to not come up with the obvious conclusion, the core did not slow down we sped up. But to draw line this line between the two is what science does not do. When a body of peer reviewed work comes out proving this is when it becomes science. Now I did poke around a little on "flat earthers" sites to see what crazy crap they are spewing about this, but I really don't like doing that cause it's embarrassing to have their crap show up on my feeds.