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Earth's Magnetic Field Reversal


Science & Tech  (tags: magnetic reversal, pole shift, Earth, solar system, compass, polarity, electronics, communications, national defense, satellites, world, science, research, tech, technology, environment, humans, magnetosphere, concept, history, geology )

SirRobert
- 331 days ago - volconvo.com
The Earth is currently in the process of reversing its magnetic polarity, and many people are asking questions as to what they should expect. North will become South causing electronics, satellites, communications and national defense to become affected.
Comments

Dalia H. (590)
Thursday January 22, 2009, 9:37 am
Good Morning. Noted dearest Robert, Thanks
Love, Black Dalia:)
 

Road LessTraveled (3197)
Thursday January 22, 2009, 10:54 am
It will be interesting; lots of changes coming... paradigm shifts in all directions
 

Eric Expeditionary (345)
Thursday January 22, 2009, 12:34 pm
This almost certainly won't be nearly as interesting asmany people assume, or maybe even hope, it will be...civilization most assuredly won't end as a result.
 

Beatrice B. (69)
Thursday January 22, 2009, 1:07 pm
Earth's Magnetic Field Reversals Illuminated By Lava Flows Study
ScienceDaily (Sep. 26, 2008) — Earth's north magnetic pole is shifting and weakening. Ancient lava flows are guiding a better understanding of what generates and controls the Earth's magnetic field – and what may drive it to occasionally reverse direction.

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See also:
Earth & Climate
•Atmosphere
•Geology
•Caving
•Earth Science
•Ice Ages
•Climate
Reference
•Mid-ocean ridge
•Shield volcano
•Igneous rock
•Basalt rock
The main magnetic field, generated by turbulent currents within the deep mass of molten iron of the Earth's outer core, periodically flips its direction, such that a compass needle would point south rather than north. Such polarity reversals have occurred hundreds of times at irregular intervals throughout the planet's history – most recently about 780,000 years ago – but scientists are still trying to understand how and why.

A new study of ancient volcanic rocks, reported in the Sept. 26 issue of the journal Science, shows that a second magnetic field source may help determine how and whether the main field reverses direction. This second field, which may originate in the shallow core just below the rocky mantle layer of the Earth, becomes important when the main north-south field weakens, as it does prior to reversing, says Brad Singer, a geology professor at the University of Wisconsin-Madison.

Singer teamed up with paleomagnetist Kenneth Hoffman, who has been researching field reversals for over 30 years, to analyze ancient lava flows from Tahiti and western Germany in order to study past patterns of the Earth's magnetic field. The magnetism of iron-rich minerals in molten lava orients along the prevailing field, then becomes locked into place as the lava cools and hardens.

"When the lava flows erupt and cool in the Earth's magnetic field, they acquire a memory of the magnetic field at that time," says Singer. "It's very difficult to destroy that in a lava flow once it's formed. You then have a recording of what the paleofield direction was like on Earth."

Hoffman, of both California Polytechnic State University at San Luis Obispo and UW-Madison, and Singer are focusing on rocks that contain evidence of times that the main north-south field has weakened, which is one sign that the polarity may flip direction. By carefully determining the ages of these lava flows, they have mapped out the shallow core field during multiple "reversal attempts" when the main field has weakened during the past million years.

During those periods of time, weakening of the main field reveals "virtual poles," regions of strong magnetism within the shallow core field. For example, Singer says, "If you were on Tahiti when those eruptions were taking place, your compass needle would point to not the North Pole, not the South Pole, but Australia."

The scientists believe the shallow core field may play a role in determining whether the main field polarity flips while weakened or whether it recovers its strength without reversing. "Mapping this field during transitional states may hold the key to understanding what happens in Earth's core when the field weakens to a point where it can actually reverse," Hoffman says.

Current evidence suggests we are now approaching one of these transitional states because the main magnetic field is relatively weak and rapidly decreasing, he says. While the last polarity reversal occurred several hundred thousand years ago, the next might come within only a few thousand years.

"Right now, historic records show that the strength of the magnetic field is declining very rapidly. From a quick back-of-the-envelope prediction, in 1,500 years the field will be as weak as it's ever been and we could go into a state of polarity reversal," says Singer. "One broad goal of our research is to provide some predictive capability for what could happen and what could be the signs of the next reversal."

Hoffman and Singer's research has been supported largely by grants from the National Science Foundation.
 

SirRobert THE FIFTH KNIGHT (279)
Thursday January 22, 2009, 4:19 pm
I would like to thank everyone for participating in this ongoing research!

Computer Generated Simulation Model Of Earth's Magnetic Field

Signature: THE FIFTH KNIGHT'S NEWS
 

Louise L. (48)
Thursday January 22, 2009, 4:34 pm
At least we won't be around to see this. Thanks, Robert.
 

SirRobert THE FIFTH KNIGHT (279)
Thursday January 22, 2009, 7:23 pm
Louise L.: I like that thought; however, scientific knowledge of the Earth's core does not include absolute empirical projections.

In other words: They do not know when this will take place, because the scientific community is divided as usual, in regard to geologic evidence.

Some say 1000 years, some say 100 years, and still others suggest 'anytime now'!

==========================

Beatrice B.; Thank you for presenting that excellent analysis report!!!


Signature: THE FIFTH KNIGHT'S NEWS
 

Ralph Sutton (49)
Thursday January 22, 2009, 8:51 pm
Very interesting, Robert, good post.

My idea is that reversal may be triggered by several different means; slow natural reversal, out of alignment with the polarity of the sun and out of alignment with the polarity of the Galaxy. The last two occur when earth's magnetic fields are weak as they are now. The earth is now in the process of a slow natural reversal, but the coming alignment with the galactic plane may speed up the reversal. There will be two factors that may cause a rapid reversal. The Sun's magnetic field is in the process of reversing as it does during each solar cycle. When that reversal is complete earth will be out of alignment with the sun and just about the time our solar system enters the galactic plane which we will also be out of alignment with, the sun will reach its maximum magnetic field strength of the current cycle while earth will be at its weakest magnetic field level. If we get past 2012 without a rapid reversal the effects shouldn't be all that bad because we will have time to make adjustments to compensate for the slow reversal; its the rapid one we have to worry about.
 

Janet Wintle (87)
Thursday January 22, 2009, 11:48 pm
My Darlings I give you words from our Father who gives me the light.
This is the time of the great pull and it has been set in place by children who followed the divine Laws of science. The planets have to be balanced and it was necessary to put magnetic stone in places on the Earth to prevent such a thing from happening ever again. It is done, but because it is such a long time since this occurrence it was deemed necessary to make sure that the stone would never ever be completely moved, for to do so would bring disaster to all life. There is times of forgetfulness and many are asleep.
There is however no thing to fear as there is no Death for the spirit is alive and I will never leave you. Blessed is my angels who fight the wrongs that are being done in ignorance.
THE CRYSTALS MUST BE PLACED BACK INSIDE THESE MONUMENTS AND ALL WILL BE REVEALED. Janet
 
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