The Earth can be considered a magnet with two poles, one positive and one negative.
We could say, for simplicity, that the earth behaves as if its center there was a very powerful bar magnet tilted 11 degrees 30 'with respect to the axis of the Earth. The magnetic poles, in fact, do not coincide with geography. The north magnetic pole is presently located in the Northwest Territories in Canada, about 1,300 km north-west of Hudson Bay, while the south magnetic pole is presently located the margin of the Antarctic continent in Adélie Land (in the open ocean towards India).
The points where the Earth's diameter coinciding with the direction of the dipole encounters the Earth's surface are called geomagnetic poles.
is now believed that the interior of the Earth behaves like a huge generator that converts the mechanical energy of moving fluid in magnetic energy.
The impact of the solar wind causes the compression of the lines of force in the part facing the Sun and the extension of those in the shade, in the latter case leading to the formation of so-called Earth's magnetic tail.
The magnetosphere extends into interplanetary vacuum from about 80 to 60,000 km in the side facing our star and more than 300,000 miles in the opposite direction.
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