The dipole magnetic field of our planet remains about the same intensity for long periods of time. While it is conventionally thought that the reversal process is done in thousands to millions of years, a team of scientists has shown that the last instance of the magnetic reversal occurred really fast, in less than 100 years. The scientific paper will be published in the Geophysical Journal International next month, though it is already available online.
Recently, it was suggested that the decrease in intensity of the Earth’s magnetic field is decreasing much faster than usual.
The magnetic field generated by our planet provides great protection to its inhabitants against the harmful solar and cosmic rays.
Also, if the reversal were to be preceded by instances of unstable magnetism, life on Earth might be endangered. The researchers of the new study focused on layers of ancient lake sediments in the Sulmona basin in Italy.
The results also revealed that the sudden flip happened after a period of instability that spanned over thousands of years.
The scientists are positive that the results of their study will potentially be of great help in finding out the reason behind the Earth’s polarity reversal. About UsIsland Crisis (News) is part of Island Crisis Network, an independent online media group based in Mauritius.


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Share this post with your friends by clicking one of the social network buttons below to help us spread the word. Magnetic Field Our planet's magnetic field is in a constant state of change, say researchers who are beginning to understand how it behaves and why. While an extinction event from radiation seems unlikely, an extinction event for electronic devices seems quite a bit more probable.
Must be the reason why Gays become so important to humanity, it must be the reverse polarity. Either North America will become South America (and vice versa) or we’ll have to get new compasses. Also, since the South Pole is going North, and this has happened before, can we then say “The South will rise again”? Technically right now the north pole is a southern magnetic pole, so after the reversal, the north pole will actually be a true magnetic north pole, which means the south ends of magnetics will point at it. Some physicists have therefore forecast the next reversal to happen in a time period of just several thousand years. If we’re concerned about big solar flares hitting earth when the magnetic field is in normal shape, what happens if a moderate solar flare hits when the shields are down?


If the North Pole is in the North, and the South Pole is in the South, would we then call the pole in the North the South Pole, or would we continue to call the North Pole the North Pole when it is in the South? Nicholas will have to relocate his dwelling and factory, and if this will affect the timing of his package deliveries. Well, surprise, surprise: this has occasionally happened in the past, and can happen yet again, earlier than we would have thought. If the field were to weaken or to temporarily ‘disappear’, the rate of cancer, for example, might increase.
And you can obviously tweak software so that, as far as the user is concerned, north is still north. The age of the ash layers was also determined using argon-argon dating, in order to know approximately the time when the last reversal happened: the reversal was concluded to have occurred between 770,000 and 795,000 years ago.
This possibility has led some scientists to suggest that a geomagnetic reversal would cause an extinction event — but so far, there are no fossil records that suggest that previous reversals were followed by mass extinctions. The most likely reason for the reversal is simply the general interaction and chaos of the massive dynamic forces at play — but there are some other hypothesized triggers, such as massive impacts, or significant plate tectonic shifts.



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Comments

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