Mercury/Magnetic Field

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Solar System Scratchpad

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Magnetic field of Mercury, the only other known internally generated magnetic field of any terrestrial planet other than Earths. Its strength is 1% that of Earth and weaker than that of Ganymede. Generated by a partially molten core in the region where the core and the mantle meet. Its magnetic equator is significantly north of the physical equator (20% of radius), so that its strength is stronger in the northern hemisphere than the southern one. The only other planet that has this characteristic is Saturn, which is off only by less than 1%. The southern polar magnetic cap, where field lines are open to the interplanetary medium are much larger than those in the north. One theory is that it is beginning to flip.

Mercury/Magnetic Field Web Pages

Mercury/Magnetic Field In the News

Mercury Has Molton Core (May 2007)

See Mercury/Core, Mercury/Magnetic Field

Magnetic Field Characterized (Jun 2011)

Confirmed bursts of energetic particles in Mercury's magnetosphere are a continuing product of the interaction of Mercury's magnetic field with the solar wind. Magnetic field stronger in North than South, indicating something odd about its core. This leaves the south polar regions more exposed to solar particles.
See Mercury/Magnetic Field, Mercury/Magnetosphere, Mercury/Core

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