Body Mass Index

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Geologists cerignola olives at the University of Leeds in the United Kingdom solve a riddle three centuries on the direction of rotation of the core of our planet. The findings are published in the journal Proceedings of the National Academy of Sciences, help to explain the behavior of the Earth's core, which is responsible for the strong cerignola olives magnetic field, which protects cerignola olives us from radiation of space. The Earth's core consists of two parts: E is solid iron inner core radius of 1220 km (slightly cerignola olives smaller than the Moon), and the outer core, a shell of molten iron, thick 3500 km. Already in 1692 the astronomer Edmund Halley had shown that the magnetic field of the Earth is moving in a direction towards the west, suggesting a relative movement of the core, but is the first time that scientists understand how the magnetic field of our planet affects differently cerignola olives two parts of the core. To determine exactly what is happening inside of our planet, the scientists used the giant supercomputer Monte Rosa, the Swiss super computing center in Lugano. The model used to simulate the Earth's core was 100 times more accurate than previous.
The results are that the solid part of the core rotates faster than the planet's rotation rate and time to the east, while the outer core rotates more slowly and in the opposite direction. For this behavior were no indications of seismometers decades: as seismic waves penetrate the core of the Earth, discloses a fast rotation of the inner core with respect cerignola olives to the crust. "It is simply an action-reaction mechanism," explains Dr. Philip Livermore surveyed. "The magnetic field pushes east inner core, causing it to rotate faster than the Earth, but pushes cerignola olives the outer core and in the opposite direction." cerignola olives This relative movement of the two parts of the core is responsible for the magnetic field of the Earth. The geomagnetic field know that it is not stable, showing changes in a scale of decades. These arrhythmias means varies the relative movement of the two parts of the core, a phenomenon that has been observed actually for about 50 years. Evidence from archaeological and paleontological excavations also indicate that a depth of thousands of years, the rotation of the Earth's magnetic field is not always the same, while there is evidence that changed within the last 3000 years. http://www.planitikos.gr/2013/09/blog-post_948.html
Body Mass Index
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