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Earth's magnetic field — also known as the geomagnetic field — is generated in our planet's interior and extends out into space, creating a region known as the magnetosphere.
Earth's magnetic field, also known as the geomagnetic field, is the magnetic field that extends from Earth's interior out into space, where it interacts with the solar wind, a stream of charged particles emanating from the Sun.
The crust of the Earth has some permanent magnetization, and the Earth’s core generates its own magnetic field, sustaining the main part of the field we measure at the surface. So we could say that the Earth is, therefore, a "magnet."
The Earth’s magnetic field is generated in the planet’s outer core by a process known as the geodynamo. The outer core is a fluid layer composed primarily of iron and nickel, heated by the inner core and the mantle.
Scientists know that today the Earth’s magnetic field is powered by the solidification of the planet’s liquid iron core. The cooling and crystallization of the core stirs up the surrounding liquid iron, creating powerful electric currents that generate a magnetic field stretching far out into space.
On Earth, flowing of liquid metal in the outer core of the planet generates electric currents. The rotation of Earth on its axis causes these electric currents to form a magnetic field which...
Generated by the motion of molten iron in Earth’s core, the magnetic field protects our planet from cosmic radiation and from the charged particles emitted by our Sun. It also provides the basis for navigation with a compass.
This dynamic force, generated by the movement of liquid iron in Earth’s outer core, undergoes periodic changes and experiences magnetic north-south flips every few hundred thousand years. Earth’s magnetic field has long been used to aid navigation by aligning compasses to the North pole.
Earth's magnetic field gets stretched out into a comet-like shape with a tail of magnetism that stretches millions of miles behind Earth, opposite from the sun. The sun has a wind of gas that pushes Earth's field from the right to the left in the drawing below.
Earth's Magnetic Field. The Earth is composed of: Solid Crust. Semi-Solid Mantle. Liquid Iron Outer Core. Solid Iron Inner Core. The magnetic field near the Earth is from a combination of three sources: 97 - 99 % Main Field (From electric currents in the Outer Core)