geomagnetic field

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geomagnetic field,

n the magnetic field produced by the earth.
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Although Earth's magnetic field has been measured and researched for about 150 years, there are still gaps in our knowledge of it.
The Earth's magnetic field is similar to that of a bar magnet tilted 11[degrees] from the spin axis of the planet.
At this point, it has been oriented in such a way that the net effect on the earth's magnetic field has been minimized," said Joseph Kunches, a space weather specialist at the U.
This data is used to determine dipole moment of the magnet and also the horizontal component of the Earth's magnetic field.
The Earth's magnetic field can be represented by lines of magnetic force emerging from the South Polar region, out into space and back into the North Polar region.
As hot lava erupts, magnetic iron oxide crystals (magnetite) within it orient themselves to align with Earth's magnetic field.
Scientists already had evidence that migratory birds use the Earth's magnetic field as a navigational aid, along with celestial cues.
Cluster, a key element of the agency's scientific programme, is designed to investigate the complex interactions between energetically charged particles streaming out from the Sun and the Earth's magnetic field.
When the Earth's magnetic field captures ionized particles carried by the solar wind, geomagnetically induced currents can flow through the power system, entering and exiting the many grounding points on a transmission network.
Researchers working on this question believe monarch migration is accomplished by a complex system of orientational and navigational tools involving the sun, the earth's magnetic field, and physical land forms.
Geologists can tell where the rocks formed because tiny magnetic minerals in the rock act ``like tiny compasses frozen in time,'' recording the direction of Earth's magnetic field, wrote Harvard geochemist Alan Jay Kaufman in a recent issue of the journal Nature.
The ST5 mission will demonstrate the ability of small satellites to perform research-quality science by taking measurements of the Earth's magnetic field using highly sensitive magnetometers.