Artikelrobot
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This flare, the 4th largest in the last 15 years, erupted just as the Region 808 sunspot cluster was rotating onto the visible disk of the sun. Intense radio emissions were also associated with this flare
http://www.southgatearc.org/news/september2005/solar_flare.htm
http://www.southgatearc.org/news/september2005/solar_flare.htm