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A geomagnetic reversal is a change in Earth's magnetic field such that the positions of magnetic north and magnetic south are interchanged. The Earth's field has alternated between periods of normal polarity, in which the direction of the field was the same as the present direction, and reverse polarity, in which the field was the opposite. These periods are called chrons. The time spans of chrons are randomly distributed with most being between 0.1 and 1 million years with an average of 450,000 years.
Most reversals are estimated to take between 1,000 and 10,000 years. The latest one, the Brunhes–Matuyama reversal, occurred 780,000 years ago. A brief complete reversal, known as the Laschamp event, occurred only 41,000 years ago during the last glacial period. That reversal lasted only about 440 years with the actual change of polarity lasting around 250 years. During this change the strength of the magnetic field dropped to 5% of its present strength. Brief disruptions that do not result in reversal are called geomagnetic excursions.
originally posted by: TruthxIsxInxThexMist
a reply to: 727Sky
I'm no expert but I'm getting a feeling that this is something to do with the 'Radiation' we are emitting and our Planet is dying as we are killing all the Nature!
July 2014 – GEOLOGY - Earth’s magnetic field is a protective shield for our planet from cosmic radiatio
originally posted by: neo96
Silly me i thought part of the protection from cosmic rays was the fact the earth rotates.
So fast if provides gravity.
That gravity keeps most of the air in place.
That air depending on the volume is natural radiation protection source.
Since radiation exposure depends on TIME, and DiSTANCE, and whatever 'barrier' is used.
originally posted by: starborn
If there was a pole shift you had better be at least 200 miles inland, because tsunamis would wipe out every coastal area around the globe. As the planet rolls out of its current orbit, and the poles readjust, it would create a sloshing effect of the worlds oceans and cause 200 foot (or higher) waves that would decimate all coastal areas.
Massive earthquakes would also occur, along with new volcanic activity. So many volcanoes would erupt at the same time, there would be huge amounts of ash blown up into the atmosphere, which would darken the planet (block sunlight) to a degree, for at least 10 years after this event.
But as in all times of darkness, the sun would eventually reappear, and the survivors would build a new world based on the values of peace and brotherhood. For through their tribulations they will have learned the value of cooperation, compassion, kindness, acceptance, tolerance and sharing with one another for the benefit of all, and not just the few.
I have heard a theory that the Magnetic Field of Earth reacts with the Solar Cycles, and the Sun is at a weak point in its cycle. So it would make sense that the earths magnetic field is also at a weak point.