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Title : The Earth's Magnetic Field Is Decreasing 10 Times Faster Than Normal And Could Reverse Within a Lifetime
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The Earth's Magnetic Field Is Decreasing 10 Times Faster Than Normal And Could Reverse Within a Lifetime

Liz Bentley
preventing disease

Can you imagine waking up one morning to discover that all compasses point south instead of north. The effect could cause health problems geomagnetic up to 15% of the world's population.

Not as strange as it sounds. The magnetic field of the Earth has flipped - but not at night - many times throughout Earth's history. Their dipolar magnetic field like a bar magnet, remains approximately the same intensity during billions of years, but for unknown reasons occasionally weakens and presumably for a few thousands of years, changes direction.

Now, a new study by a team of scientists from Italy, France, Columbia University and the University of California, Berkeley, shows that the last magnetic reversal 786,000 years ago actually happened very quickly in less than 100 years -. more or less all human life


"it's amazing how quickly we see that investment "Berkeley graduate student Courtney sprained said. "The paleomagnetic data are very well done. This is one of the best records we have so far of what happens during an investment and how quickly these investments can happen."

How humans [19459019areaffected]

Many animals can sense the magnetic field of the Earth , why not people, asks Oleg Shumilov of Institute of Industrial Ecology North Problems in Russia.

a 2006 review of research on cardiovascular health and disturbances in the Earth's magnetic field in the polls journal Geophysics ( DOI: 10.1007 / s10712-006-9010-7) concluded that it was a possible link between human health and geomagnetism and the effects appear to be more pronounced at high latitudes

One study. Australian 2006, for example, also a correlation between peaks found in the number of suicides and geomagnetic activity ( Bioelectromagnetic, vol. 27 p 155 ).

pull could affect Mains and rates of cancer

Sprain and Paul Renne, director of the Berkeley Geochronology and professor -in-residence at the University of Berkeley earth and planetary sciences, are co-authors of the study, which will be published in the November issue of the International journal Geophysical .

the discovery comes as new evidence indicates that the intensity of the magnetic field of the Earth is decreasing 10 times faster than normal, leading some geophysicists to predict a change within a few thousand years.

Although a magnetic reversal is an important phenomenon of planetary scale driven convection in the iron core of the Earth, there are no documented disasters associated with previous investments, despite much searching in the geological and biological record . Today, however, an investment of this type could potentially wreak havoc on our electrical grid, generating currents that could take it down.

And since the magnetic field of the Earth protects life energy particles solar and cosmic rays, which can cause genetic mutations, a weakening or temporary loss of the field before investing permanently may increase cancer rates. The danger to life would be even higher if shots were preceded by long periods of unstable magnetic behavior.

"We should think more about what would be the biological effects," Renne said.

coronal mass ejections from the sun also significantly affect the Earth during this transition.

quotes from ash deposits Windward Volcanoes

the new finding is based in measuring the magnetic field alignment layers of sediments of ancient lakes now exposed in the basin of Sulmona Apennine mountains east of Rome, Italy. Lake sediments are interspersed with layers of ash came from the Roman volcanic province, a vast area of ​​volcanoes upwind of the ancient lake that includes volcanoes erupting periodically near Sabatini, Vesuvius and the Alban Hills.

Italian researchers led by Leonardo Sagnotti the National Institute of Geophysics and Volcanology in Rome measure the directions of the magnetic field frozen in sediments, and accumulating at the bottom of ancient lake.

sprain and Renne use argon-argon dating, a widely used method to determine the age of rocks, whether thousands or millions of years to determine the age of the ash layers above and below the recording of the latest investment of the sediment layer . These dates were confirmed by his colleague and former postdoctoral student at UC Berkeley Sebastien Nomade Laboratory of Climate Sciences and the Environment in Gif-sur-Yvette, France.

Because the lake sediments were deposited a high and constant rate over a period of 10,000 years, the team was able to interpolate the date of the layer showing the magnetic reversal, called the transition Matuyama-Brunhes, approximately 786,000 years ago. This date is much more accurate than those of previous studies, which place the reversal between 770,000 and 795,000 years ago.

"What's amazing is that it goes from reverse polarity to a field that is essentially normal with nothing in the middle, which means I had to have happened very quickly, probably in less than 100 years, "Renne said. "We do not know whether the next reversal will occur as suddenly as it did, but also do not know that it will not."

The unstable magnetic field Preceded 180 degree flip

Whether or not the new finding translates into problems of modern civilization, is likely to help researchers understand how and why the magnetic field of the Earth episodically reverses polarity, Renne said.

magnetic team led by Italy obtained shows that the sudden jerk of 180 degrees field was preceded by a period of instability that lasted for over 6,000 years record. Instability included two intervals of low intensity magnetic field that lasted about 2,000 years each. Rapid changes in the field orientations may have occurred within the first range of low resistance. The total investment of magnetic polarity - that is, the end cap and very fast to what is today the field. - Occurred toward the end of the last interval low field strength

Renne continues its collaboration with the Italian-French team to map the lake record with past climate changes.

Renne and sprained work at the Berkeley Geochronology Center was supported by the Ann and Gordon Getty Foundation.

"The Earth's Magnetic Field Is Decreasing 10 Times Faster Than Normal And Could Reverse Within a Lifetime", article source: riseearth.com

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