Help Support EarthSky with a Donation ! The planet's magnetosphere, though small enough to fit within Earth, is strong enough to trap solar wind plasma. Planetary magnetic fields are generated by flows in the hot, liquid iron cores of the planets.Measurements made by Mariner 10 in 1974/75 showed that Mercury also has a magnetic field. This field, along with the planet's high density and small size relative to the Earth, indicates that it probably has a molten iron core. Mercury’s Magnetic Field. At room temperature, the element mercury is not very magnetic at all. The magnetic field strength of Mercury at the planet’s surface is approximately 1% that of Earth’s surface field. NASA’s MESSENGER spacecraft has detected magnetic signals in Mercury’s surface rocks, and even stronger ones in lower orbit. It is likely that this magnetic field is generated by a dynamo effect, in a manner similar to the magnetic field of Earth. Mercury is a tiny little planet, the smallest amongst the … The magnetic field strength of Mercury at the planet’s surface is approximately 1% that of Earth’s surface field. Earth has a dipolar field with two poles, but Mercury has a dipolar-quadrupolar one with two poles and a shift in the magnetic equator. Two representative MESSENGER orbits are shown in green. Mercury in the middle of a meteor shower The measurements made by the Mercury Atmospheric and Surface Composition Spectrometer aboard NASA's Messenger revealed seasonal […] We used to have a magnetic moon The point on the studies is related to the magnetic field of the Moon, at least up to about 3.3 billion years ago and now extinct. The intrinsic magnetic field of the planet Mercury and the implications of such a field for the planetary interior are also discussed.

It has a very small, negative magnetic susceptibility, meaning that when you put mercury in a magnetic field, it magnetizes just a little tiny bit in the opposite direction. Mercury's magnetic field is approximately a magnetic dipole (meaning the field has only two magnetic poles) apparently global, on planet Mercury. Sure enough, Mercury's magnetic field strength had diminished since 1974, right in line with the predicted value of the creation magnetic field model. Recent MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) measurements have shown that Mercury's magnetic field is axial‐dominant, yet strongly asymmetric with respect to the equator: the field strength in the Northern Hemisphere is approximately 3 times stronger than that in the Southern Hemisphere. Credit: NASA Magnetic Fields: Much like Earth, Mercury has a significant, and apparently global, magnetic field, one which is about 1.1% the strength of Earth’s. Mercury has possessed a magnetic field for billions of years, and that field may have once been as strong as the Earth's, researchers say. Abstract. Mercury's magnetic field is strong enough to deflect the solar wind around the planet, creating a magnetosphere. Data from Mariner 10 led to its discovery in 1974; the spacecraft measured the field's strength as 1.1% that of Earth's magnetic field. Near the end of its mission, the MESSENGER spacecraft revealed Mercury's magnetic field to be at least 3.7 to 3.9 billion years old, or older. This comparatively low field strength presents a number of challenges, both theoretically to understand how it is generated and observationally to distinguish the internal field from that due to the solar wind interaction. A visualization of Mercury's mysterious magnetic fields. Admittedly, I have limited knowledge of Physics and couldn’t begin to say whether or not this type of mechanism would be possible. If Mercury's magnetic field is supposed to have lasted for many millions of years, then it should be very stable over vast time periods.

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