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Scientists discover a new type of magnetic event

16 May 2018, 10:22 UTC
Scientists discover a new type of magnetic event
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Space scientists recently uncovered a new type of magnetic event in the near-Earth environment. The new event happens just outside the outer boundary of Earth’s magnetosphere – the sphere around Earth within which our world’s magnetic field is the dominant field – in a region called the magnetosheath. Scientists using an innovative technique to squeeze extra information out of existing data learned that a process known as magnetic reconnection takes place in the magnetosheath. They reported their new discovery in a study in the peer-reviewed journal Nature on May 9, 2018.
Earth moving through space, with parts of its magnetosphere and magnetosheath labeled, via David Darling.
Before you shake your head and move on, consider this. Consider the famous Halloween Storms of the year 2003. They weren’t ordinary rain storms, but geomagnetic storms high in Earth’s atmosphere, triggered by massive solar flares erupting on the sun, which had sent X-rays zooming through our solar system. Along with the flares, the sun expelled giant clouds of solar material, called coronal mass ejections, or CMEs. The CMEs slammed into Earth’s magnetic field and pushed material and energy in toward Earth, creating the Halloween Storms, which caused brilliant auroras that could be seen ...

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