As a pair of active regions began to rotate into view, their towering magnetic field lines above them bloomed into a dazzling display of twisting arches (Oct. 27-28, 2015).

Some of the lines reached over and connected with the neighboring active region. Active regions are usually the source of solar storms.

The images were taken in a wavelength of extreme ultraviolet light. Credit: Solar Dynamics Observatory, NASA.

http://www.nasa.gov/

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