The mystery involves electron acceleration during magnetic explosions that occur, for example, in solar flares and "substorms" in the Earth's magnetosphere - the comet-shaped protective sheath that surrounds the planet and where brilliant auroras occur.
During solar flares, accelerated electrons take away up to 50 percent of the total released flare energy. How so many electrons are accelerated to such high energies during these explosive events in our local part of the universe has remained unexplained.
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| ©NOAA |
| Diagram of the effects of a solar flare. |








