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The longest one, in the sun's southern hemisphere stretches, more than 400,000 km from end to end. "It's one of the longest filamentary structures I have ever seen," says veteran observer Bob Runyan of Shelton, Nebraska.If any of the filaments collapses, it could hit the stellar surface and explode, producing a Hyder flare. Filaments can also become unstable and erupt outward, hurling pieces of themselves into space. Either way, astronomers with solar telescopes are encouraged to monitor developments.For more information, please visit: www.spaceweather.com
...Most flares occur around active regions associated with sunspot groups. However, occasionally a flare (sudden brightening) is observed well away from an active region or sunspot group. These flares are invariably associated with the sudden disappearance of a large (thick, long, 'bushy') dark solar filament, and are termed Hyder flares. ...The bottom line is that at this stage in solar physics we do not really know what produces a flare nor what produces a CME.For more information, please visit: http://www.ips.gov.au/Educational/2/4/1
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