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What’s magnetic north would become magnetic south. Is Earth headed to a pole reversal? A look at the archaeological record in southern Africa provides clues.
By John Tarduno, University of Rochester and Vincent Hare, University of Rochester The Earth is blanketed by a magnetic field. It’s what makes compasses point north, and protects our atmosphere from continual bombardment from space by charged particles such as protons. Without a magnetic field, our atmosphere would slowly be stripped away by harmful radiation, and life would almost certainly not exist as it does today. You might imagine the magnetic field is a timeless, constant aspect of life on Earth, and to some extent you would be right. But Earth’s magnetic field actually does change. Every so often – on the order of several hundred thousand years or so – the magnetic field has flipped. North has pointed south, and vice versa. And when the field flips it also tends to become very weak.
The Aurora Borealis (Northern Lights) and Aurora Australis (Southern Lights) are the result of electrons colliding with the upper reaches of Earth’s atmosphere. (Protons cause faint and diffuse aurora, usually not easily visible to the human eye.) The electrons are energized through acceleration processes in the downwind tail (night side) of the magnetosphere and at lower altitudes along auroral field lines. The accelerated electrons follow the magnetic field of Earth down to the Polar Regions where they collide with oxygen and nitrogen atoms and molecules in Earth’s upper atmosphere. In these collisions, the electrons transfer their energy to the atmosphere thus exciting the atoms and molecules to higher energy states. When they relax back down to lower energy states, they release their energy in the form of light. This is similar to how a neon light works. The aurora typically forms 80 to 500 km above Earth’s surface.
And hold your horses, our world might be doing just that. For at least three centuries, the Earth’s magnetic field has been fading, in an ever faster pace. Right now, it is about 10 percent weaker than it was when scientists started keeping track of it in 1845. Also, there’s the poetically named ‘South Atlantic Anomaly’. That’s a huge chunk of Earth, deep underneath the ocean floor, where the turnover has already begun.
With all the talk about climate change and global warming doesn't it beg to show another possible reason for one or the other or both occurring?
I do not think it really matters what causes it.
If we get this change in the magnetic poles ,do I buy a new compass ? Will water start to run up hill ? What happens to the cold north winds ? inquiring minds need to know :>)
I do not think it really matters what causes it
originally posted by: the2ofusr1
a reply to: intrptr
But I don't want to go in that direction
Your compass needle will point the opposite direction.
originally posted by: intergalactic fire
I do not think it really matters what causes it
Yes and No.
I believe it really would help for prevention or eventually preparations.
To know the specific cause can help us a great deal in 'effective treatment' just like a disease or solving any problem.
But if the SHTF, survival experience is more important I guess.
Although, there aren't major signs within history that during shifts, plant and animal life suffer extensive difficulties.
We have survived previous shift so why wouldn't we do so with the next one?
I believe the only studies we have on spaceweather and human health comes from astronauts.
I don't know if the Apollo astronauts suffered any particular diseases related to their space exploration.
The Earth's magnetic field has no effect on sunlight.
Think of it like this, one day the Earth is wearing a hat and using an umbrella to protect us and the next day the wind blows and makes the umbrella tip over to the side, it still offers protection, but it has shifted where that protection is, allowing for other areas not protected by the hat to receive more direct sunlight, causing an unusual warming in certain areas, but the hat is still there.
Citation?
According to some information, the answer is a resounding, Yes! The Aurora has become visible further south in recent years.
The ISS is still guarded by our magnetic field, not sure if they tested astronauts of the Apollo missions or if you could without dissection.
Every living person to walk on the moon is past the average American life expectancy of 79 years.
originally posted by: sweetypie215
originally posted by: intergalactic fire
I do not think it really matters what causes it
Yes and No.
I believe it really would help for prevention or eventually preparations.
To know the specific cause can help us a great deal in 'effective treatment' just like a disease or solving any problem.
But if the SHTF, survival experience is more important I guess.
Although, there aren't major signs within history that during shifts, plant and animal life suffer extensive difficulties.
We have survived previous shift so why wouldn't we do so with the next one?
I believe the only studies we have on spaceweather and human health comes from astronauts.
I don't know if the Apollo astronauts suffered any particular diseases related to their space exploration.
Who says we have survived, these shifts take 1000's of years to complete. Also, the current civilization relies on technology that could be rendered obsolete if there is a major geo-magnetic storm unleashed due to the weakening of the magnetosphere. There is surviving and there is survival. There is living and being alive.