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ObiWan377
2004-Jan-23, 12:30 AM
Hello all. Long time no see. I have yet another question concerning recent astrological events, so please bear with me.

If you have been to www.spaceweather.com lately, you might have heard about a loop or something on the sun called a prominence. They say it could cause a Hyder Flare.

What exactly is a Hyder Flare, and is it any different then a solar flare?

SarahMc
2004-Jan-23, 12:47 AM
Basically, an eruptive prominence. Prominences and filaments are regions of cooler, denser ionized gases (cooler than the surrounding corona). Normally, they'd fall back into the sun, and that would be the end of it. Occasionally, they get suspended above the chromosphere by magnetic fields, and can stay that way for extended times. When the field collapses, some of the suspended gases follow the field back to the sun, and portions of it can be cast away as a coronal mass ejection - an eruptive prominence.

More detailed information on Hyder flares (http://www.ips.gov.au/Main.php?CatID=8&SecID=2&SecName=The%20Sun%20and%2 0Solar%20Activity&SubSecID=5&SubSecName=Solar%20Fl ares&LinkName=Hyder%20Flares)

The most recent EIT 195 MPEG (http://sohowww.nascom.nasa.gov/data/LATEST/current_eit_195.mpg) shows an eruptive prominence off the southeast limb (the lower left), which created a coronal mass ejection earlier today. It's quite obvious towards the end of the sequence.