A solar flare is an intense burst of radiation coming from the release of magnetic energy associated with sunspots.
What are solar flares?
What is a solar flare? Everything you need to know
Can a Solar Flare Be Powerful Enough to Wipe Out All Life on Earth
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Massive X-class solar flare erupted from sun
Solar flares explode with huge energy thanks to a simple magnetic phenomenon
Solar Flares
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Solar flares: How the Sun could be 'waking up' after a quiet patch - BBC Newsround