* the Utopia impact injected so much heat into the Martian mantle that it drastically reduced the temperature difference driving the dynamo.
There is also true polar wandering which appears to be linked to plate movements and provides proof of continental drift . the above picture is Ellef Ringnes Island , the location of Earth's North Magnetic Pole in 1994
* An ESA Satellite program designed to give a more precise reading of the field and a representation of the magnetic field’s changes over time
The Orion Prophecy – one of the most influential psuedoscientific books
A Brief Guide To Magnetism, Terrestrial Magnetic Field and Polar Reversals Jack Oughton
Definitions Dynamo - A system that uses electromagnetic induction to convert mechanical energy (motion) into a magnetic field Ferromagnetism is believed to be caused by magnetic fields generated by the electrons' spins in combination with a mechanism known as exchange coupling , which aligns all the spins in each magnetic domain. Curie temperature (Tc ) The temperature above which a ferromagnetic material loses its permanent magnetism. In minerals, lightning often flash-heats minerals above their Curie temperatures, effectively resetting the magnetic fields trapped in lava flows.
All known magnetic fields are caused by the movement of electrical charges . Electrons in orbit in atoms give rise to magnetic fields, so that every atom is, like the Earth, surrounded by a magnetic field Magnetism in a nutshell
Ampere suggests in 1820 that magnetic properties of matter were due to tiny atomic currents
The dynamo theory proposed by the German-born American physicist Walter M. Elsasser and the British geophysicist Edward Bullard during the mid-1900s
All atoms exhibit magnetic effects
The medium in which charges are moving effects magnetic forces
A magnet cannot have a single North pole or a single South pole, which would be called a ‘monopole’
if you break a bar magnet into two pieces, each piece will again have a North and South pole. If you take one of those pieces and break it again, each smaller piece will have a North and South pole. No matter how small the pieces of the magnet become, each piece must have two poles.
Ocean water generates electric currents as it moves in the main field, so that the ebb and flow of the tides have a slight magnetic effect.
As gauged by satellites, the main field is roughly 6,000 times stronger than the rock magnetism of the ocean floor, and 30,000 times greater than the influence of the oceanic tides.
Fun fact: it’s believed a "supergiant" asteroid several times larger than the one that likely killed the dinosaurs struck Ma r s with such force that it shut down the planet's magnetic field *
“ T here have been effects on earth during solar max due to the influx of the sun on the power grid and the communications, and if we’re going to head toward a reversal, all of those problems are going to become more serious. ”
Reversals take a few thousand years to complete, and during that time--contrary to popular belief--the magnetic field does not vanish . " It just gets more complicated ”.
Magnetic lines of force near Earth's surface become twisted and tangled, and magnetic poles pop up in unaccustomed places.
A south magnetic pole might emerge over Africa, for instance, or a north pole over Tahiti
But it's still a planetary magnetic field, and it still protects us from space radiation and solar storms.
The Earth’s magnetic field is generally becoming weaker.
a French-Danish team compared results from 2000 with those from an American satellite, Magsat, 20 years earlier
The decline in the field’s strength suggested that “ it might disappear completely in a thousand years or so .”
Some of them have theorized this is the first stage of a flip
The satellites will adopt orbits passing over the Earth’s poles. Swarm A and B will fly side by side, simultaneously measuring the magnetic field from positions up to 150 kilometres apart in the east-west direction near the equator.
Like any disaster scenario, the field’s reversal has inspired a creative outpouring of human paranoia. Most is pseudoscience. Lots of ‘Prophecies’
"The Core," a Hollywood film, gives a wildly exaggerated portrayal of what would happen if the field vanished. People with pacemakers fall dead. Pigeons fly into people and windows, the sun burns off portions of the sea.
Author Patrick Geryl believes that in the year 2012 the world will suffer a major disaster that will wipe out billions.
“ In my book I scientifically reveal the millennia-old codes of the Maya and the Old Egyptians, which refer to this super-disaster. ”
“ Giant sun-flames will send a gigantic wave of particles to the earth. The particles that are spewed out will set the earth's atmosphere "in flames" and have a real destructive effect on the Van Allen belts. Because of the continuous stream of electromagnetism, the magnetic field of the earth will get overcharged. Trillions of particles will reach the poles. ”
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European Space Association, 2005. Focus on our magnetic planet. Physorg.com . Available at: http://www.physorg.com/news2792.html [Accessed January 6, 2010].
Geryl, P., 2004. 2012. National Association for Scientific and Cultural Appreciation [NASCA] . Available at: http://www.nasca.org.uk/Asian_disaster/2012/2012.html [Accessed January 6, 2010].
Phillips, D.T., 2003. Earth's Inconstant Magnetic Field. Earth's Inconstant Magnetic Field . Available at: http://science.nasa.gov/headlines/Y2003/29dec_magneticfield.htm [Accessed January 6, 2010].
Roach, J., 2004. Why Does Earth's Magnetic Field Flip? National Geographic . Available at: http://news.nationalgeographic.com/news/2004/09/0927_040927_field_flip.html [Accessed January 6, 2010].
Stern, D.D.P., 2008. Origin of The Earth's Magnetism. The Self-Sustaining Dynamo in the Earth's Core . Available at: http://www.phy6.org/earthmag/dynamos2.htm [Accessed January 6, 2010].