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View Full Version : Big CME from a quiet sun



John Kierein
2004-Sep-09, 09:48 AM
Happening now.
Look at SOHO coronagraphs.

http://sohowww.nascom.nasa.gov/data/realtime-images.html

BAroxMysox
2004-Sep-09, 10:23 AM
GLP is gonna go nuts over this...

Amadeus
2004-Sep-09, 11:51 AM
Can someone explain in laymans terms what I am looking at?
This not a subject that I know a lot about other than the sun is bright and a bit hot. :D

John Kierein
2004-Sep-09, 12:06 PM
Look at the LASCO C3 images. The sun is hidden behind an occulting disc. It is the size of the white ring on the black disc.
There is a big cloud of ionized hot gas being ejected to the left side of the image. It's a coronal mass expulsion or CME. These are usually coming from a big sunspot.
But there are no sunspots on that side of the sun facing us. It must be from a sunspot on the left backside. The holographic images didn't show any there, so it must be a new one. Totally unexpected. The sun has been very quiet as expected during this quiet time of the sunspot cycle.

Some people say that CMEs can happen when a comet hits the sun. If this was a comet I didn't see it on the LASCO images; Maybe it was a piece of planet X.

frogesque
2004-Sep-09, 09:45 PM
Latest SOHO images show a lot of activity on the left hand limb of the sun and a smallish sunspot coming into view. I don't know about GLPers but the guys on Aurora Alerts (http://www.gi.alaska.edu/AuroraAlerts/viewforum.php?f=4)will be keeping the camera lenses polished over the next few days if a CME gets pointed our way.