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Post by Chicago Astronomer Joe on Aug 11, 2006 15:33:38 GMT -6
Big Sunspot coming around
BIG SUNSPOT: The rapid growth of sunspot group 904 continues. It is now almost 100,000 km (60,000 miles!) long. Dennis Simmons of Brisbane, Australia, photographed the behemoth this morning:
When sunspots grow very quickly, their magnetic fields can become unstable and explode. Sunspot 904 harbors energy for M-class eruptions and poses a gathering threat for X-flares. Stay tuned for further developments.