The Sun Just Erupted The Biggest Solar Flare in 12 Years And It Has Affected Earth -



This solar cycle, the sun's 11-year periodic activity cycle, began in 2008. It has been unusually quiet, with very low sunspot activity. But although we're moving into solar minimum, the quietest period of the cycle, activity can still occur. And how.Solar flare activity has interesting effects on Earth. This one knocked out high-frequency radio, according to the NOAA, and degraded low-frequency navigation.Both flares erupted from an active region called AR 2673, which also produced an M-class flare a few days ago. Of the two sunspot regions currently active, both flares came from the smaller - a size of just 7 Earths by 9 Earths.

The particles from the CME can also cause aurora activity as they interact with Earth's magnetosphere, so keep your eyes on the skies. They should be arriving within a few days.
The most recent X9 flare took place in 2006, at X9.0. In 2005, a massive X17 flare erupted. The biggest solar flare of all time was a humungous X28 back in 2003, which luckily was at an oblique angle to Earth, so we managed to avoid the full brunt. Even so, it managed to overload all NASA's solar sensors.

How long sunspots last varies. The longest-lived sunspot on record hung around for six months, so it's entirely possible we haven't heard the last from AR 2673



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