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| Violent Sunspot Group AR 1302 Unleashes a Flare (September 28, 2011) |
The Sun's most active sunspot group in years is AR 1302, and it was so large that it could be seen without a telescope. Due to the strong geomagnetic storms, significant auroral activity has occurred around Earth's poles. The solar flare above is classified as an X-class solar flare--it is the biggest and brightest solar flare, and can cause
planet-wide radio blackouts and long-lasting radiation storms.
This solar flare is huge! I like that the Earth is in the background too because it gives one perspective on the magnitude of space and the solar system. You can tell that the Earth is far away, and the flare is BIG.
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