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Post by af4ex on Dec 7, 2010 0:45:50 GMT
... upon closer examination, it's starting to look like a very long filament coming out of the old 1123/1121 area. The 2334Z SDO Composite shows a filament reaching out almost to the limb. Is this possibly some 'extended filament' phenomenology that's only visible in the microwave spectrum? Attachments:
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Post by af4ex on Dec 7, 2010 1:29:55 GMT
Bingo! This prominence can be seen in the SOHO and SDO EUV 304A spectrum. (I was wrong about it coming from old 1123/1121). But still can't see it in the other wavelengths (except microwave). Bob or Leif, what's going on here? Birth of a new region? Attachments:
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Post by scpg02 on Dec 7, 2010 2:42:01 GMT
still looks like that filament that we have already seen.
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Post by af4ex on Dec 7, 2010 3:16:02 GMT
scpg02> still looks like that filament that we have already seen. That's what I thought, too. But looking at the SDO Composite 30 minutes ago (below), there's no filament extending beyond that part of the SE limb. And it only shows up in 304A and microwave. Very strange (to me). solar.nro.nao.ac.jp/norh/html/10mins/2010/12/07/movie.htmlAttachments:
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Post by af4ex on Dec 7, 2010 3:25:13 GMT
... and the GOES Xray flux is still ramped up, for the last few hours, coinciding with this prominence. Coincidence? Has to be because there's no Xrays coming from that edge. Xray ramp-up most likely coming from the old 1123/1121 which looks brighter than ever. Getting more active? Attachments:
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Post by af4ex on Dec 7, 2010 3:33:16 GMT
Latest GOES Xray flux. Looks like old 1123/1121 region might become an active region again? Perhaps this solar cycle is evolving into its next stage. Attachments:
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Post by af4ex on Dec 7, 2010 3:46:12 GMT
Looks like it's still on the far side, whatever it is. Attachments:
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Post by Bob k6tr on Dec 7, 2010 4:12:10 GMT
Latest GOES Xray flux. Looks like old 1123/1121 region might become an active region again? Perhaps this solar cycle is evolving into its next stage. The 304A index broke 230 6 weeks ago. |
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Post by scpg02 on Dec 7, 2010 4:44:04 GMT
Looks like it's still on the far side, whatever it is. Upon further examination I believe you are correct. |
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Post by af4ex on Dec 7, 2010 11:54:10 GMT
Bob k6tr> The 304A index broke 230 6 weeks ago. Yes, that was back when old AR1121 was very active and facing the Earth. I think this is something entirely different, involving singly-ionized helium (Helium II) floating in the atmosphere. It's been going on like this steadily since at least 1050Z yesterday (when Nobeyama starting capturing it). It's emitting 304A (and microwaves) but the luminosity is not bright, just matching background, so I don't think it will show up at all in the SDO SEM 304A integrated intensity report. So, probably won't have much effect on our ionosphere either. According to this website, the Helium II is an indication of some kind of "transition" going on in the atmosphere. www.windows2universe.org/sun/spectrum/uv_helium_ions_he_ii_eit304.html"Radiation at this wavelength [304A] allows scientists to see structures and processes in the transition region - a special area in the Sun's atmosphere. The transition region is the boundary between the Sun's lower atmosphere (chromosphere) and its upper atmosphere (corona). " Why is this "transition region" suddenly manifesting itself in this new structure? Perhaps Leif can fill us in on what's happening. Attachments:
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Post by af4ex on Dec 7, 2010 12:30:10 GMT
... and the latest status on that "xray ramp-up": It seems to have ended with a tiny B1.9 blip at the end which NOAA assigned to AR1133 But no event appears to have been reported for the larger event. ?? Attachments:
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Post by lsvalgaard on Dec 7, 2010 12:40:13 GMT
... and the latest status on that "xray ramp-up": It seems to have ended with a tiny B1.9 blip at the end which NOAA assigned to AR1133 But no event appears to have been reported for the larger event. ?? The Sun is a messy place, and all sorts of stuff is happening. Most of it just random roiling. It is also not fruitful to speculate about the shape of every cloud in the Earth's atmosphere [although in some cases, tornadoes and hurricanes, it is important]. |
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Post by af4ex on Dec 7, 2010 13:02:40 GMT
@leif
> .... Most of it just random roiling.
But what about that cloud of Helium II? Seems like there is some underlying process going on underneath that is exceptionally immaculate, no trace of activity except in 304A and microwaves. Not your typical entropy soup, I would think.
Have you ever seen this kind of cloud before?
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Post by miedosoracing on Dec 7, 2010 13:04:35 GMT
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Post by af4ex on Dec 7, 2010 13:32:38 GMT
miedosoracing> ... Very cool. Yes, it is. Almost looks like there is some kind of "connection" between the filament and that Helium II cloud. But the filament is visible at many wavelengths, the cloud is much stealthier, can only be seen in 304A and microwaves. So, optical illusion or connection? There's a story posted with that video at spaceweather.com, but they don't mention the He II cloud: "EPIC BLAST: As predicted, the a "mega-filament" of solar magnetism erupted on Dec. 6th, producing a blast of epic proportions. NASA's Solar Dynamics Observatory recorded the action as the 700,000-km long structure lifted off the stellar surface and--snap!!--hurled itself into space. Click on the arrow to play the movie:" That means it's been there for a day or so. Going back to 6-Dec Nobeyama I can see it there too. So perhaps it's the "splash" of the filament re-entering the solar atmosphere? On the other side of the Sun! But that still doesn't explain why the cloud has lingered so long, a day after the filament itself has disappeared.
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