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The OUTER CORE
The outer liquid core produces the strong magnetic field of the Earth, through the dynamo effect.
Rocks which are liquid (lava) have their magnetic particles aligned to the local magnetic field as they cool and solidify. The rocks can be dated by the radioactive decay processes. If there is a new layer of rock (lava) laid down over this same deposit and the magnetic filed has altered, the new rock will have a different imposted magnetic field and age than the older rock.
The Outer Core
The Earth projects a powerful magnetic field from the spinning of it's mantle/core. These magnetic fields deflect most of the Suns worst rays. But some pass through but are also deflected by various parts of the atmosphere.
What escapes the crust is what we observe as the earths magnetic field. The outer core is a rotating mass of fluid metal that induces an electrical current which in turn generates the magnetosphere.
No it is not. The ozone depletion is independent of the cracks in magnetic field.
What escapes the crust is what we observe as the earths magnetic field. The outer core is a rotating mass of fluid metal that induces an electrical current which in turn generates the magnetosphere.
The OUTER CORE
bob
The outer liquid core produces the strong magnetic field of the Earth, through the dynamo effect.
The earth's outer core produces the magnetic field.
Rocks which are liquid (lava) have their magnetic particles aligned to the local magnetic field as they cool and solidify. The rocks can be dated by the radioactive decay processes. If there is a new layer of rock (lava) laid down over this same deposit and the magnetic filed has altered, the new rock will have a different imposted magnetic field and age than the older rock.
The Outer Core
Probably very little would change if you either doubled the magnetic field strength, reversed it, or made it zero. If you reversed it, the larger hole might form over the north pole. UV-C from the Sun makes ozone in the ozone layer, most solar wind (the stuff affected by our magnetic field) does not survive to reach the ozone layer. The poles might retain a bit more ozone into the late spring, with a nearly unmeasureable decrease in overall ozone levels to match.
Scientists think that the presence of the molten nickel iron layer of Earth's outer core and the spinning of the planet creates the magnetic field through the geodynamo mechanism.The geodynamo mechanism couples the convection of the liquid metal in the Earth's core with the magnetic field to create the current responsible for the magnetic field.Other planets with a molten metal core can also have a magnetic field.See related links.Earth's magnetic field is generated by the electric currents in the conductive material of its core.
The Earth projects a powerful magnetic field from the spinning of it's mantle/core. These magnetic fields deflect most of the Suns worst rays. But some pass through but are also deflected by various parts of the atmosphere.