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Originally posted by stirling
The loss of this magnetic field meaqns also the loss of these huge currents of electricity, and the reversal of them, means the currents must also be reversed.
this requires a period where the currents actually stop.
no manetic field at this time, till the current flows the other way.
What the momentary loss of current(nobody knows how long it takes to reverse) will do to affect the earth is anybodys guess at this point.
I would surely like to hear some opinions as to what the mag field of earth is caused by.
National Geographic News: Earth's Core, Magnetic Field Changing Fast, Study Says
Rapid changes in the churning movement of Earth's liquid outer core are weakening the magnetic field in some regions of the planet's surface, a new study says.
"What is so surprising is that rapid, almost sudden, changes take place in the Earth's magnetic field," said study co-author Nils Olsen, a geophysicist at the Danish National Space Center in Copenhagen.
The findings suggest similarly quick changes are simultaneously occurring in the liquid metal, 1,900 miles (3,000 kilometers) below the surface, he said.
The swirling flow of molten iron and nickel around Earth's solid center triggers an electrical current, which generates the planet's magnetic field.
Flip-Flop
Fluctuations in the magnetic field have occurred in several far-flung regions of Earth, the researchers found.
In 2003 scientists found pronounced changes in the magnetic field in the Australasian region. In 2004, however, the changes were focused on Southern Africa.
The changes "may suggest the possibility of an upcoming reversal of the geomagnetic field," said study co-author Mioara Mandea, a scientist at the German Research Centre for Geosciences in Potsdam....
Location of Geomagnetic Equator is a time function of geomagnetic dipole for the ARCTIC CELL see GMF & Arctic temperature
More GMF and temperature charts can be found here: Graphs and Formulae
North magnetic pole position shifts
Here’s another interesting correlation. The Position of the north magnetic pole has been shifting rapidly over the last several decades. The rate of change of it’s declination correlates with the variations in Earth’s length of day and the motion of the sun relative to the centre of mass of the solar system...
More interesting information on Earth’s magnetism and it’s relationship with the sun here: www.appinsys.com...
If the changes in Length of Day are related to changes in the circulation of currents of molten material beneath the Earth’s crust, we could speculate that magnetic iron ores are shifting their predominant accumulations and this affects the location of the magnetic north pole.
Guest post by Paul Vaughan, M.Sc. – August 18, 2010 Scientists characterize Earth rotation velocity using a variable they call length of day (LOD). The rate of change of LOD (LOD’) is related to global average wind patterns....
Comment by Malcolm Miller:
I worked on Earth rotation for 15 years at Mounts Stromlo Observatory. Anything that affects the mass distribution near the surface of the planet changes the moment of inertia enough to affect the rotation rate, whether distribution of air, water, wind, tree growth, of the movement of magma under the crust.
Originally posted by crimvelvet
reply to post by adept2u
Interesting stuff on Magnetic fields
National Geographic News: Earth's Core, Magnetic Field Changing Fast, Study Says
Rapid changes in the churning movement of Earth's liquid outer core are weakening the magnetic field in some regions of the planet's surface, a new study says.
"What is so surprising is that rapid, almost sudden, changes take place in the Earth's magnetic field," said study co-author Nils Olsen, a geophysicist at the Danish National Space Center in Copenhagen.
The findings suggest similarly quick changes are simultaneously occurring in the liquid metal, 1,900 miles (3,000 kilometers) below the surface, he said.
The swirling flow of molten iron and nickel around Earth's solid center triggers an electrical current, which generates the planet's magnetic field.
Flip-Flop
Fluctuations in the magnetic field have occurred in several far-flung regions of Earth, the researchers found.
In 2003 scientists found pronounced changes in the magnetic field in the Australasian region. In 2004, however, the changes were focused on Southern Africa.
The changes "may suggest the possibility of an upcoming reversal of the geomagnetic field," said study co-author Mioara Mandea, a scientist at the German Research Centre for Geosciences in Potsdam....
Magnetic Field Weakening in Stages, Old Ships' Logs Suggest
Geomagnetic Equator
Location of Geomagnetic Equator is a time function of geomagnetic dipole for the ARCTIC CELL see GMF & Arctic temperature
More GMF and temperature charts can be found here: Graphs and Formulae
Earth's Gravity pictured: news.bbc.co.uk...
Several sources indicate rapid changes in the earth's magnetic field. There also seems to be a correlation with Earth's Length of Day and the Earth's Length of Day seems to correlate with the changes in global temperature. GRAPH
North magnetic pole position shifts
Here’s another interesting correlation. The Position of the north magnetic pole has been shifting rapidly over the last several decades. The rate of change of it’s declination correlates with the variations in Earth’s length of day and the motion of the sun relative to the centre of mass of the solar system...
More interesting information on Earth’s magnetism and it’s relationship with the sun here: www.appinsys.com...
If the changes in Length of Day are related to changes in the circulation of currents of molten material beneath the Earth’s crust, we could speculate that magnetic iron ores are shifting their predominant accumulations and this affects the location of the magnetic north pole.
Guest post by Paul Vaughan, M.Sc. – August 18, 2010 Scientists characterize Earth rotation velocity using a variable they call length of day (LOD). The rate of change of LOD (LOD’) is related to global average wind patterns....
Comment by Malcolm Miller:
I worked on Earth rotation for 15 years at Mounts Stromlo Observatory. Anything that affects the mass distribution near the surface of the planet changes the moment of inertia enough to affect the rotation rate, whether distribution of air, water, wind, tree growth, of the movement of magma under the crust.
GRAPH #1
Graph #2
Graph #3
Abbreviations:
LOD = length of day
SCL = solar cycle length
AMO = Atlantic Multidecadal Oscillation (Sea surface Temperature)
GLAAM = global atmospheric angular momentum
NOR = nutation in obliquity residual
[] indicates time-integration
SOI = Southern Oscillation Index
Listening for Cosmic Rays !
The Inuvik Neutron Monitor by Jan Houseman and Alan Fehr
Revised and adapted to the Web by John W Bieber
Based upon Report Number 5 of the Scientific Report Series of the Aurora Research Institute.
INTRODUCTION
The Earth is continuously showered with cosmic rays from the Sun and outer space. These are tiny particles that enter the Earth’s atmosphere at nearly the speed of light (the fastest speed possible in the universe). Cosmic rays affect many aspects of our lives, and sometimes these tiny particles can create significant problems....
...On average, sunspot numbers peak every 11 years when the Sun is most active. Plasma and magnetic fields spread out from the Sun and create a barrier which galactic cosmic rays must struggle through. Thus, when the Sun is active, fewer galactic cosmic rays reach Earth....
...The Earth’s magnetic field acts as a protective barrier against cosmic rays. Because they are mostly charged particles, their direction of travel is strongly influenced by magnetic fields. The higher the energy acquired by cosmic ray particles, the less affected they are by magnetic fields....
...Cosmic rays do not get far into the atmosphere before they collide with nitrogen or oxygen molecules in the air. The collision destroys the cosmic ray particle and the air molecule, and then several new particles emerge. Cosmic rays from space are termed "primary," and any particles created in the atmosphere from collisions are termed "secondary." A bit of energy is transferred to each new secondary particle. Secondary cosmic rays spread out and continue to hit other particles and air molecules, creating a cascade of particles showering towards the ground. Figure 2 shows how the particles shower to the ground. The number of secondary cosmic rays in the atmosphere increases to a maximum, and then diminishes as the energy fades closer to the ground. Because of atmospheric absorption, low energy particles are plentiful and high energy particles are rare....
Health risks
Living organisms exposed to very high levels of any radiation are at risk of cellular damage that may cause cancer. Astronauts and pilots who fly at extremely high levels in the atmosphere are most at risk from cosmic rays. If a high energy cosmic ray hit, for example, a reproductive cell, it could alter the genetic material possibly causing mutations. For this reason, aviation organizations who send people to these altitudes are interested in the data acquired by cosmic ray monitors. Genetic mutations are not always harmful, as they may allow organisms to adapt to a changing environment.
COSMIC RAYS IN OUR LIVES
By monitoring cosmic rays we notice increases and decreases of cosmic ray strength at ground level. The changes occur for various reasons, and depending on the intensity, they have various effects on Earth’s environment, our technology, and our lives. The following section describes the different effects of cosmic rays. One must remember that cosmic rays are just one aspect of the complex relationship between Earth and the cosmos. ....
Originally posted by crimvelvet
reply to post by adept2u
I would like to add the combination of the Solar wind AND our Geomagnetic field AND our Atmosphere is what keeps high energy particles (Cosmic Rays) from bombarding the surface of the earth. NASA: Solar Wind Loses Power, Hits 50-year Low
High energy particles are known to cause mutations. I suggest you read this whole article since it answers many of the questions raised.
Listening for Cosmic Rays !
The Inuvik Neutron Monitor by Jan Houseman and Alan Fehr
Revised and adapted to the Web by John W Bieber
Based upon Report Number 5 of the Scientific Report Series of the Aurora Research Institute.
INTRODUCTION
The Earth is continuously showered with cosmic rays from the Sun and outer space. These are tiny particles that enter the Earth’s atmosphere at nearly the speed of light (the fastest speed possible in the universe). Cosmic rays affect many aspects of our lives, and sometimes these tiny particles can create significant problems....
...On average, sunspot numbers peak every 11 years when the Sun is most active. Plasma and magnetic fields spread out from the Sun and create a barrier which galactic cosmic rays must struggle through. Thus, when the Sun is active, fewer galactic cosmic rays reach Earth....
...The Earth’s magnetic field acts as a protective barrier against cosmic rays. Because they are mostly charged particles, their direction of travel is strongly influenced by magnetic fields. The higher the energy acquired by cosmic ray particles, the less affected they are by magnetic fields....
...Cosmic rays do not get far into the atmosphere before they collide with nitrogen or oxygen molecules in the air. The collision destroys the cosmic ray particle and the air molecule, and then several new particles emerge. Cosmic rays from space are termed "primary," and any particles created in the atmosphere from collisions are termed "secondary." A bit of energy is transferred to each new secondary particle. Secondary cosmic rays spread out and continue to hit other particles and air molecules, creating a cascade of particles showering towards the ground. Figure 2 shows how the particles shower to the ground. The number of secondary cosmic rays in the atmosphere increases to a maximum, and then diminishes as the energy fades closer to the ground. Because of atmospheric absorption, low energy particles are plentiful and high energy particles are rare....
Health risks
Living organisms exposed to very high levels of any radiation are at risk of cellular damage that may cause cancer. Astronauts and pilots who fly at extremely high levels in the atmosphere are most at risk from cosmic rays. If a high energy cosmic ray hit, for example, a reproductive cell, it could alter the genetic material possibly causing mutations. For this reason, aviation organizations who send people to these altitudes are interested in the data acquired by cosmic ray monitors. Genetic mutations are not always harmful, as they may allow organisms to adapt to a changing environment.
COSMIC RAYS IN OUR LIVES
By monitoring cosmic rays we notice increases and decreases of cosmic ray strength at ground level. The changes occur for various reasons, and depending on the intensity, they have various effects on Earth’s environment, our technology, and our lives. The following section describes the different effects of cosmic rays. One must remember that cosmic rays are just one aspect of the complex relationship between Earth and the cosmos. ....
During my fact finding tour to affected villages I found that the land of the area have developed cracks stretching 20 to 40 meters and caved in by 3 to 6 feet at the different places.
Originally posted by crimvelvet
Comment by Malcolm Miller:
I worked on Earth rotation for 15 years at Mounts Stromlo Observatory. Anything that affects the mass distribution near the surface of the planet changes the moment of inertia enough to affect the rotation rate, whether distribution of air, water, wind, tree growth, of the movement of magma under the crust.