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@dicki
http://www.bbc.co.uk/news/science-environment-22539160
On Tuesday, it released the biggest solar flare of 2013 so far, an intense burst associated with a huge eruption of particles.
When these eruptions reach Earth, they can interfere with satellites and communications systems on the ground.
The sunspots that spawned these flares are not directly facing our planet, but some Nasa spacecraft could be in the path of the solar particles.
An X-class flare is equivalent to a billion hydrogen bombs. We're talking about a colossal amount of energy
Increased numbers of flares are expected at the moment because the Sun's normal 11-year activity cycle is approaching its peak - known as a solar maximum - this year.