X Marks the Spot 

NASA scientists have spotted unusual shapes in the Earth's ionosphere, hundreds of miles above the Earth's surface. 

The ionosphere stretches from 50 to 400 miles above the planet and marks the boundary between our planet's atmosphere and outer space. While it houses most satellites orbiting the Earth, it's vulnerable to changes in space weather — electromagnetic radiation emitted by the Sun — that can wreak havoc in the zone and mess with communications equipment. 

Under some conditions, the layer can become electrically charged. As detected by the Global-scale Observations of the Limb and Disk (GOLD) imaging instrument, plasma bands stretching across the ionosphere can result in formations of unusual X and C shapes.

By Victor Tangermann.

Full story at Yahoo News.