Deep within the Earth, a fierce molten core is generating a magnetic field capable of defending our planet against devastating solar winds.
The magnetosphere is a large area around the Earth produced by the planet's magnetic field. By examining pottery from prehistory to modern times, scientists have discovered just how dramatically the field has changed in the last few centuries.They’ve found that Earth’s magnetic field is in a permanent state of flux.
Life has existed on the Earth for billions of years, during which there have been many reversals. The weather patterns on Earth would change drastically as storms and hurricanes would increase in intensity and frequency.
A hypothesis advanced by McCormac and Evans postulates that during a magnetic pole reversal the Earth’s field would disappear altogether. The protective field extends thousands of miles into space and its magnetism affects everything from global communication to animal migration and weather patterns.
In fact, a recent Danish study believes global warming is directly related to the magnetic field rather than CO2 emissions.The study claimed that the planet is experiencing a natural period of low cloud cover due to fewer cosmic rays entering the atmosphere.
But historic evidence of its decline has already been found in a surprising source – ancient pottery.Scientists have discovered that ancient pots can act as a magnetic time capsule. Magnetic north drifts around and every few hundred thousand years the polarity flips so a compass would point south instead of north.


Magnetic north drifts and every few hundred thousand years the polarity flips so a compass would point south instead of north. Astrophysical satellite are just switched off in this location, but from my perspective, this isn’t much good if you want to study the Brazilian rainforest.’'The very highly charged particles can have a deleterious effect on the satellites and astronauts,' added Dr Mona Kessel, a Magnetosphere discipline scientist at Nasa. According to these researchers, the atmosphere of Mars may have been stripped away by the solar wind because it lacked protection from a magnetic field.
But this magnetic field, so important to life on Earth, has weakened by 15 per cent over the last 200 years.
The impact could be devastating for mankind, knocking out power grids, radically changing Earth’s climate and driving up rates of cancer. The strength of the magnetic field also constantly changes and currently it is showing signs of significant weakening.The Earth magnetic field is mainly generated in the very hot molten core of the planet. Scientists however, are quick to point out that while a magnetic flip could cause problems for mankind, the event won’t be a catastrophic. Once every 450,000 years or so, the magnetic North and South poles shift and this process takes anywhere from 1,000 to 10,000 years to complete. In the absence of the current magnetism, these animals would behave erratically and their numbers would certainly dwindle.
The high energy particles trapped in the Van Allen radiation belt could be liberated and they would bombard the Earth.


When pots form, the magnetite minerals align with the Earth’s magnetic field, just like compass needles. The last time this happened, the magnetic field dropped to around 5% of its current intensity. Magnetic reversal or flip is the process by which the North Pole is transformed into the South and vice versa, typically following a considerable reduction in the strength of the magnetic field.
The much sought-after spectacle of an aurora would be visible every night all over the Earth as solar winds hit the atmosphere. However, weakening of the magnetic field does not always result in a reversal.During a reversal, scientists expect to see more complicated field pattern at the Earth's surface, with perhaps more than one North and South Pole at any given time. There remains, however, much work yet to be done in understanding the properties of the deep Earth. The overall strength of the field, anywhere on the Earth, may be no more than a tenth of its strength now. The Earth’s core is a hostile world where the crushing forces and temperatures, similar to that of the surface of the sun, take our scientific understanding and abilities to the limit.'This isn't some crazy theory that might happen,' said Professor Wild.



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