Earth's magnetic field is weakening
by Mitch Battros -
Earth Changes Media
June 24th 2013
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Earth's magnetic field is generated by what is known as
the "dynamo or dipole" theory which involves the
convection of liquid iron in the outer core. The latest
data continues to show Earth's magnetic field is
weakening. Ongoing studies supported by the NSF
(National Science Foundation) indicate a connection
between submarine troughs (rifts), Earth's mantle, and
Earth's outer core. New research illustrates the
shifting of magnetic flux, via Earth's magnetic field -
has a direct and symbiotic relationship to Earth's outer
core, mantle, lithosphere, and crust.
Right now the magnetic field is weakening significantly.
This will continue until it reaches zero point, at which
time there will be a full magnetic reversal. Until this
time, we will witness magnetic north bouncing in the
northern hemisphere. Closer to the moments of a full
reversal, we will see magnetic north drop down below the
equator. During this phase of a weakening field, charged
particles can penetrate through all levels of inner and
outer atmosphere further descending to Earth's core.
Evidence for such events has been found in sediment
cores taken from deep ocean floors revealing magnetic
polarity shifts and its effect on Earth's core.
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Right now the magnetic field is weakening significantly.
This will continue until it reaches zero point, at which
time there will be a full magnetic reversal. Until this
time, we will witness magnetic north bouncing in the
northern hemisphere. Closer to the moments of a full
reversal, we will see magnetic north drop down below the
equator.
During this phase of a weakening field, charged
particles can penetrate through all levels of inner and
outer atmosphere further descending to Earth's core.
Evidence for such events has been found in sediment
cores taken from deep ocean floors revealing magnetic
polarity shifts and its effect on Earth's core.
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One such area is the Mid-Atlantic Rift where the North
American and European continental plates are spreading
as the result of mantle plumes where viscous molten rock
ebbs and flows as a product of an over-heated or cooling
core. As lava solidifies, it creates a record of the
orientation of past magnetic fields much like that of
tree rings.
41,000 years ago, the Earth's magnetic field faded and
practically disappeared, leaving our planet unprotected
from the bombardment of cosmic rays. A team of submarine
geologist discovered this event in sediment cores
collected off the coasts of Portugal and Papua New
Guinea. In their samples, they found an excess of
beryllium-10, an isotope produced by cosmic rays and
atoms of nitrogen and oxygen. In sedimentary beds dating
from the age of the
Laschamp excursion, the researchers found up to
twice as much 10Be as normal, evidence of the intense
cosmic ray bombardment that the Earth underwent.
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The magnetic north pole had moved at approximately 10
miles per year in the early 1800's more than 600 miles
(1,100 km). It is now moving faster at more than 40
miles per year since around 2001. This current trend of
a weakening magnetic field suggests that Earth might
undergo an excursion similar to the one that took place
41,000 years ago. Since high energy cosmic rays has an
effect on Earth's core and can cause cell damage, such
an event would have a significant impact on
biodiversity, and in particular on humans. This is why
researchers are seeking to find out a more accurate
prediction of future magnetic field excursions and
reversals.
Mitch Battros Producer - Earth Changes Media
Email: newsletter@earthchangesmedia.com
Web:
http://www.earthchangesmedia.com
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