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#11
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Fractal distributions would be easy to predict recurrence from. My
guess is that the distribution is not fractal but is the "heavy-tailed" equivalent to a Gaussian distribution. If so, that is bad news in that heavy tailed distributions have an infinite variance and are the subject of intense research because many natural phenomena appear to be heavy-tailed. My hunch is that a lot of geological phenomena are heavy-tailed. "Heavy tails" means that the tails of such distributions do not asymptotically approach zero--that there is infinite area under the curve. With small numbers of observations heavy-tailed distributions will pass all tests for normality. rick++ wrote: A number of geophysicists believe magnetic reversal statistics are "fractal stochastic", that generally random, but clumpy. Earthquake occurances have these statistics. For example the mean recurrence rate of M7+ quakes on the southern San Andreas is about 250 years, with quakes spacing as close a 50 years and far apart as 500 years. Plus there is the issue of data resolution. There are mini-reversals just a few ten thousand years long seen in the past few million years. However, due to the sparser rocker record further back in time its harder to detect min-reversals. When mini-reversals are filtered out, the reversal rate is mor eon the or of a million years. Still, data resolution does not explain the absence of reversals for 30-some million years in the late Mesozoic. Something more fundamentally different in interior earth processes may have been happening then. |
#12
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Subject:
answers as to why a 780,000 year when the average is 200,000 year cycle for reversepolarity NOVA's "Magnetic Storm" Date: Fri, 21 Nov 2003 13:58:57 -0600 From: Archimedes Plutonium Reply-To: NOdtgEMAIL Organization: whole entire Universe is just one big atom where dots of the electron-dot-cloud are galaxies Newsgroups: sci.geo.geology, sci.astro, sci.physics rick++ wrote: A number of geophysicists believe magnetic reversal statistics are "fractal stochastic", that generally random, but clumpy. Earthquake occurances have these statistics. For example the mean recurrence rate of M7+ quakes on the southern San Andreas is about 250 years, with quakes spacing as close a 50 years and far apart as 500 years. Plus there is the issue of data resolution. There are mini-reversals just a few ten thousand years long seen in the past few million years. However, due to the sparser rocker record further back in time its harder to detect min-reversals. When mini-reversals are filtered out, the reversal rate is mor eon the or of a million years. Still, data resolution does not explain the absence of reversals for 30-some million years in the late Mesozoic. Something more fundamentally different in interior earth processes may have been happening then. Yes, I think that TV program was slanted and biased in the direction of fractal and chaos. I have a strong bias against fractal and chaos theory in that it is more of an "excuse and a philosophy" rather than an explanation or science. Science is pattern and more important "explanation". To say something has fractal geometry is not explanation. It is akin to saying that it is difficult science. So it is philosophy and not science. Convection currents are science but very difficult. It is made very much more complex due to the fact that the core is a huge mix of compounds and elements and it is this mixture that has not really been adequately given a scientific analysis. I think it is the mixture in the core that is the primary cause of the periodicity of reversals. For example, in a modelling where you have say 75% of the core as molten iron and 25% molten lead then the period of flipping should be somewhat "regular". Much like the regularity of the 200,000 year flip that the core actually does experience. Suggesting that the 200,000 year flip relates to some specific metal mix of the core that is the cause of the regularity. Question to physics: Should the Earth core become more homogenous in its mix over time or should it become less? I think the answer is that as energy is increased into the core that the mix should become more homogenous in that if we stir a soup it becomes more homogenous. I think modelling is our best means of explanation since we will not see or directly sample the Earth's core. But we may develop some future tools to help. I would say the Mesozoic data resolution is so fuzzy that it is pointless to discuss it. I would say use only the data that is somewhat clear which is the last 10 million years. I was able to find a website showing the interior of Europa and it has no metal core. I was wondering if anyone knows of a website that shows most every planet and its moon of a cross section slice all the way through its core. The science of astronomy and geology should have an official website that shows the latest knowledge as to a cross section slice into the entire planet showing its core. And another website should have the official latest information as to the rotation of axis of all the planets and their moons with respect to the plane of revolution of our solarsystem. I will try to re-find that Europa picture website. What I am interested in is comparing the cores of Mercury, Venus, Earth, Mars to that of Europa and all the other moons of the gasgiants along with the gasgiants because in the CellWell theory the cores of Mercury, Venus, Earth and Mars should stand apart from the cores of the gasgiants and their moons. Even the cores of the moons of the gasgiants should stand apart from the cores of the gasgiants. So if anyone has one website that shows pictures of all the cores of astro bodies in our SolarSystem is doing the world of science a huge favor. Likewise, one website showing us all the axis of rotation to plane of revolution for all of the Solar System. Archimedes Plutonium, whole entire Universe is just one big atom where dots of the electron-dot-cloud are galaxies |
#13
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Subject:
answers as to why a 780,000 year when the average is 200,000year cycle for reversepolarity NOVA's "Magnetic Storm" Date: Fri, 21 Nov 2003 14:10:15 -0600 From: Archimedes Plutonium Reply-To: NOdtgEMAIL Organization: whole entire Universe is just one big atom where dots of the electron-dot-cloud are galaxies Newsgroups: sci.geo.geology, sci.astro, sci.physics Robert Ehrlich wrote: Fractal distributions would be easy to predict recurrence from. My guess is that the distribution is not fractal but is the "heavy-tailed" equivalent to a Gaussian distribution. If so, that is bad news in that heavy tailed distributions have an infinite variance and are the subject of intense research because many natural phenomena appear to be heavy-tailed. My hunch is that a lot of geological phenomena are heavy-tailed. "Heavy tails" means that the tails of such distributions do not asymptotically approach zero--that there is infinite area under the curve. With small numbers of observations heavy-tailed distributions will pass all tests for normality. I am not sure I know what "heavy-tails" are geometrically speaking. I have a good idea of fractal distribution as to some geometry. Unless a distribution can be given a geometry, it is of little value or no value. As Rick mentioned "clumpiness" which directly relates to the actual chemical mixture of the core. For it is all going to have to refer to the chemical mixture of the core as to what happens in the core. In the end it is all going to have to be about the metal mix of the core and not about what fanciful mathematics catches some eyes. Archimedes Plutonium, whole entire Universe is just one big atom where dots of the electron-dot-cloud are galaxies |
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