Venus will provide an important new perspective on the issue because like Mars, it has no global magnetic field, yet it is similar in size to Earth and has a much thicker atmosphere. Changes measured by the Swarm satellite over the past 6 months shows that Earth's magnetic field is changing. Earth’s magnetic field acts as a shield against the bombardment of particles continuously streaming from the sun.
When the Sun starts flaring, the Earth's atmosphere receives increased amounts of X-ray and EUV fluxes. Earth's geomagnetic field makes the compass work and protects the biosphere from cosmic radiation. 11-29-11: I am astounded as Last night's CME impact was small by normal standards and yet it created magnetic Pulsations. Proton Flux: Solar protons normally have insufficient energy to penetrate through the Earth's magnetic field. Sedona Skyquake - I saw a buildup within the earth or sun and a high frequency discharge right at the time Gregg and others heard sound just before 5pm. The Earth's magnetic field acts like a bubble that protects the planet from solar activity Such a breach can cause brilliant auroras or disrupt satellite and ground communications. The shield was discovered in the Van Allen radiation belts - two doughnut-shaped rings above Earth that are filled with high-energy electrons and protons But while scientists know this mysterious shield exists, they are baffled as to how it formed and how exactly it works. 'Somewhat like the shields created by force fields on Star Trek that were used to repel alien weapons, we are seeing an invisible shield blocking these electrons,' said Professor Daniel Baker from the University of Colorado Boulder. Because the solar particles (ions and electrons) are electrically charged, they feel magnetic forces and most are deflected by our planet's magnetic field. Ultimately, the magnetic properties of matter are determined by the collective behavior of the negatively charged electrons that orbit the nuclei of atoms. The field has existed at least three billion years, although it fluctuates in strength and at times reverses polarity. 21, 2012 - CME - Lonetree saw the magnetic impulse before government facilities at Boulder, having more sensitive equipment than theirs.
However, during unusually strong solar flare events, protons can be produced with sufficient energies to penetrate deeper into the Earth's magnetosphere and ionosphere. This allows solar wind - a stream of charged particles spewing from the sun at 1 million mph - to penetrate the Earth's upper atmosphere. The Earth's magnetic field protects the planet from most of the solar flaresThe Themis results could have a bearing on how scientists predict the severity of solar storms and their effects on power grids, airline and military communications and satellite signals.The Themis satellites were launched to find the source of brief powerful geomagnetic disturbances in the Earth's atmosphere. 4th members of the Van Allen Probes science team discussed current findings made in unlocking the mysteries of the radiation belts.
The magnetic dipole moment (or magnetic field) of an individual electron has two components, one resulting from the spin of the electron about its own axis, the other from its orbital motion about the nucleus. Regions where deeper penetration can occur includes the north pole, south pole, and South Atlantic magnetic anomaly. Earth's geomagnetic field intensity, a dipole-dominated field, is dropping slowly but steadily. Twenty times more solar wind passed into the Earth's protective shield when the magnetic fields were aligned, Professor Oieroset said. Both kinds of motion may be considered as tiny circular currents (moving charges), thus linking electricity and magnetism at an atomic level. Substantial changes in the field happen as quickly as within only a thousand years at times, although stable periods of hundreds of thousands of years also occur.
Temperature patterns within the lower mantle influence both the stability and intensity of the field. When the energetic protons leave the Sun, they preferentially follow (or are guided by) the Sun's powerful magnetic field.
At some time in the distant future -- Geomagnetic Zero Point -- the deep Earth reactor will stop spinning, melting magma, creating the aura of Earth’s geomagnetic field, and turn cold. When solar protons enter the domain of the Earth's magnetosphere where the magnetic fields become stronger than the solar magnetic fields, they are guided by the Earth's magnetic field into the polar regions where the majority of the Earth's magnetic field lines enter and exit. Massive changes in or on the Earth, including extinction events, follow a 26.6 million to 30 million year cycle over the last 250 million years. But long before that happens, we can expect normal reversals in the polarity of our magnetic field. These isotopes are deposited chronologically in the archives of our earth, such as trees, polar ice, lake and deep sea sediments.
By measuring their concentration profiles, which in most cases is possible with AMS only, information on past changes in solar activity, geomagnetic field and earth climate can be obtained over long time intervals.

In 2011, cryptochrome was suggested by biophysicists as a mechanism for for perception of such suble fields.
Even minor fluctuations in earth fields are related to psychophysical anomalies in human beings.
During past polarity flips there were no mass extinctions or evidence of radiation damage. Changes in the core's temperature and Earth's rotation boil and swirl the liquid metal around in the outer core, creating magnetic field lines.
From those variations, animals seem able to determine their orientation in relation to Earth’s magnetic field.
A knowledge of the crustal magnetic field is often very valuable as a geophysical exploration tool for determining the local geology.
Modern research (Hild, 2006, "Places and States of Mind for Healing") confirms evidence of psychophysical effects opening a deeper awareness of the interplay of spirit and matter through weak electromagnetic interactions of Earth's telluric and cosmic fields. His team engineered flies to be cryptochrome-deficient: They struggled to orient within a magnetically-charged maze. Biological systems generate their own magnetic mediums through a process he calls "dia-par", or diamagnetic to paramagnetic transition.
Sedlak proposes that the science of magnetohydrodynamics (MHD) can be used to model living bioplasma.
A wide spectrum of genetic mechanisms now appear to be under the influence of surrounding electromagnetic fields. Very little is known about the behavior of the magnetic field during the transition from a superchron (long periods without reversal) to a mixed polarity state, though we can imagine intense auroras surrounding the globe. Complex cycles of climate migration and Earth crust instability share 1) the sun-earth relationship, embedded in the solar system, 2) solar heliopsphere and bow shock of geomagnetic field, 3) Earth's connection to our galactic center plasma fields.
Local geomagnetic field fluctuations are seen to dramatically change as a function of directed mental protocols.
These same fields are also changed and uniquely altered when measured in close coupling to the human body. It appears that mental protocols that send out thoughts and energy, even from distant points around the world, directly affect the local geomagnetic fields in accordance with intentions.
Mankind is closely tied to Earth's geomagnetic fields, as quantum entanglement vehicles of information transfer, fields that underlie extraordinary forms of communication such as telepathy. 12,000, 32,000, 43,000 and 70,000 yrs ago the reduced magnetic field rendered Earth especially vulnerable to cosmic rays.
Whether geomagnetic excursions admit cosmic radiation or the gamma blasts cause the excursions is uncertain. Asymmetry between pre- and post-reversal phases is a dominant characteristic, indicating the importance of field regeneration to initiate a new stable polarity interval. When meteor impact occurs there may be a time lag from initiating event to actual field reversal of many thousands of years.
There is evidence for extraordinarily rapid change of the geomagnetic field during a reversal. Liminality is a dissociative weakening of the threshold between our rational and irrational minds and is relevant to paranormal experience, both "life-potentiating" and "life depotentiating." Field effects include "creative" and "toxic" hallucinations and temporal lobe microseizures [Krippner and Persinger]. If the GMF should destabilize, scientists tell us magnetic fields of flux both entering and flowing from the Earth would become much more randomized. But marked field fluctuations such as the South Atlantic anomaly (magnetic field intensity 60% of predicted value) precede them. In the last 20 years, the planet's magnetic field intensity has decreased by 1.7%, and in South Atlantic by 10%. As the geomagnetic field continues to weaken, the inner Van Allen belt gets closer to the Earth, with a related enlargement of the SAA at given altitudes. Researchers have just begun to detect such rapid magnetic field changes taking place over just a few months. A flip in the north and south poles typically involves a weakening in the magnetic field, followed by a period of rapid recovery and reorganization of opposite polarity. Weakening of Earth's overall magnetic field by 10 percent over the past 150 years might also point to an approaching field reversal. The Earth's magnetic field extends about 36,000 miles (58,000 km) into space, generated from the spinning effect of the electrically conductive core that acts something like a giant electromagnet.
Movement of the liquid and the solid parts of the Earth's core generate an electric potential, making the planet a sort of an electric generator.

We have evolved in the presence of this magnetic field, the magnetosphere that also protects us from solar radiation.
Paleomagnetic records show that the dipole polarity of the geomagnetic field has reversed many times in the past.
Geologic evidence from Steens Mountain, Oregon reveals a detailed record of magnetic reversal with shifts of up to 6 degrees per day.
However, the solid inner core inhibits magnetic reversals because the field in the inner core can only change on the much longer time scale of diffusion.
This is probably the reason the times between reversals of the Earth's field are long and randomly distributed. Organisms respond to natural and artificial magnetic fields of various intensities, frequencies and directions. Field deprivation and geomagnetic field variations can produce anomalous psychophysical effects. Earth's magnetic field is currently changing dramatically as part of its normal cyclic behavior.
Fluctuations in the level of the GMF, a quasi-static magnetic field, and geomagnetic storms have been associated with a number of health effects and disorders in scientific literature for more than 50 years.
Changes in the geomagnetic field have deviated from the predictions of the original International Geomagnetic Reference Field (IGRF) coefficients. Scientists from the Institute for Geomagnetism at the Russian Academy of Sciences say the Earth's magnet poles are gradually drifting towards the Equator, with the field intensity falling slowly, but steadily. Nevertheless, in 1906, research revealed that in the past magnetization of some rocks was opposite to that of the present day.
Scientists predict the North Pole could eventually be found in the South Atlantic, site of an extensive anomaly area with the magnetic field intensity at around 60% of the predicted value. Russian scientists include our anti-radiation protection falling, with space flights becoming impossible and energy-dependent systems, including mobile phones and satellites, failing.
Solar and space radiation would affect the genome of the organisms inhabiting the Earth, causing some of them to become extinct, and others to have a much larger per cent of mutations. Taking into account the solar flares, accompanied by extremely powerful electrojet currents, life is likely to become impossible on Earth before the full magnetic field collapses. Recent reports say that in the last 90 million years, the magnetic poles changed around every 500,000 years, with no total extinction or mass genetic mutations of living organisms taking place. Nobody has ever found out why the Earth's history has seen times when the magnetic poles remained unshifted as long as 50 million years. We can read the evidence of many magnetic reversals in the relentless march of the seabed floor.
Valkovic links massive faunal extinctions with polarity reversals in earth’s geomagnetic field.
He assumed that the concentration factor for essential trace elements is dependent on the magnetic field. In phase oscillations of inclination and intensity records point to drifting non dipole field anomalies." (B. Urrutia-Fucugauchi, 1997) Careful measurements of oriented samples of faintly magnetized rocks taken from many geographical sites allow scientists to work out the geological history of the magnetic field. We can tell, for example, that the Earth has had a magnetic field for at least 3.5 billion years, and that the field has always exhibited a certain amount of time-dependence, part of which is normal variation. Part of the cycle is an occasional reversal of polarity; the magnetic field occasionally flips over! Occasionally, however, the variation becomes sufficiently large so the magnetic poles end up being located rather distantly from the geographic poles. Therefore, after an excursional period, the magnetic field, upon returning to its usual state of rough alignment with the Earth’s rotational axis, could just as easily have one polarity as another. A compass could point in almost any direction depending on one’s location on the Earth and the exact form of the mid-transitional magnetic field. Some of these fields are natural; others are produced by household appliances and technologies.

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