Magma Ocean

May 14, 2011 by USA Post 

Magma OceanMagma Ocean, There is a deep magma ocean hidden beneath the crust of Jupiter’s moon Io, a new study. Just a little larger than Earth’s moon, Io is the most volcanically active body in the solar system. The finding solves a longstanding debate about how much inside the moon must be cast to feed the ongoing eruptions.

“At any time, Io has 400 [and] perhaps most active volcanoes,” said study leader Krishan Khurana, a planetary physicist at the University of California at Los Angeles.

“They are very powerful, can shoot the feathers in the space at a height of about 300 miles [500 kilometers].” Find a wide magma ocean means, “now we know why there are so many, and where the lava is coming.”

Khurana and his colleagues made the discovery after reviewing the readings from the Galileo spacecraft, which orbited Jupiter from 1995 to 2003 and made occasional flybys of the planet’s moons, including Io.

The data showed how shifts Io Jupiter’s huge magnetic field through a process called electromagnetic induction, “very similar to the rationale used by the metal detectors at the airport,” said Khurana.

Magma has high electrical conductivity, said, a trait that laboratory studies have demonstrated similar molten rock is expected to lie beneath the surface of Io.

As the electromagnetic field penetrates Io Jupiter, which interacts with the ocean of magma, and creates a current in the outer edge of the layer of molten rock. This current in turn generates its own electromagnetic waves, which divert the field lines from Jupiter, the effect of the Galileo spacecraft was able to detect.

The data show that the magma of Io exists in a subsurface layer that is about 20 to 30 miles (30 to 50 kilometers) below the surface, between the crust and mantle.

Magma layer is at least 30 miles (50 kilometers) thick, and it might be as thick as 200 miles (320 kilometers).

Furthermore, the magma probably is not completely liquid, Khurana said. On the contrary, has the consistency of slushy ice with a mixture of molten rock and glass.

The hot mud is created by tidal forces from Jupiter’s gravity mammoth, which slowly knead the moon as it moves in its orbit, which generates huge amounts of heat as rock crystals rub together.

Once formed, the magma ocean wave energy is concentrated in itself, keeping the toast of the Cape: “A muddy magma ocean is a perfect place to heat friction,” said Khurana.

The discovery was not made earlier because Io’s volcanoes emit large amounts of ionized gases, which also interact with the magnetic field of Jupiter, he added.

It took until now for scientists to produce good models of sufficient equipment to drill spot but this interference and the additional effect of the magma ocean

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