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Post by Bob k6tr on Oct 28, 2010 15:16:09 GMT
Kevin wrote : " tiny spot is trying to form towards the northeast of 1117."
Kevin right now there are 8 of these "Pre-Sunspot" regions on the sun. 2 in the Southern Hemisphere and 6 in the North. 6 have specks at the moment. One looked like it was going to take-off last night and then pooped out. What will be on the face of the sun when measurement time comes will be interesting.
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Post by lsvalgaard on Oct 28, 2010 17:04:44 GMT
"One looked like it was going to take-off last night and then pooped out."
This may be a sign of the Livingston & Penn effect at work. Sunspots form by coalescence of pores and specks. L&P may be the result of that process becoming less efficient.
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Post by Bob k6tr on Oct 31, 2010 3:08:01 GMT
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Post by THEO BAKALEXIS on Oct 31, 2010 14:21:40 GMT
Three photos today. 1) The new active region coming from NE and numbered 1120. She has sunspots. She likes like an energetic volcano. 2) AR 1117 goes to the farside of the disk. Some sunspots remain inside her. Low flares inside her. 3) A Detached prominence near the AR 1117 in the only basic phainomenon at the limb.
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Post by lsvalgaard on Oct 31, 2010 14:54:24 GMT
It is, indeed, a bit high, but not exceptional. The butterfly diagram does widen a bit as the cycle gets underway.
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Post by af4ex on Oct 31, 2010 15:44:49 GMT
From the SC24 home page: "Update - A C5.7 Solar Flare took place around Sunspot 1117 early on Sunday. This region is about to rotate onto the western limb." As most of you know, solar flares are not exclusively x-ray events (x-rays account for only 1% of their energy), but easier to detect there because of the high SNR. They're also easily viewed in the RF spectrum (if you happen to have a big enough antenna farm). You can see a video of this flare in the microwave spectrum (17Ghz) at the Nobeyama site (Frame #35 @ 0430:02Z ): solar.nro.nao.ac.jp/norh/html/10min/2010/10/31/movie.htmlThe Nobeyama antenna farm consists of 84 parabolic dishes, each 80cm in diameter, arranged in a 'tee' shaped array. solar.nro.nao.ac.jp/norh/html/introduction.html[H/T to Leif]
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Post by Bob k6tr on Nov 1, 2010 5:55:36 GMT
Numbers for Oct 2010
The Monthly Mean Solar Flux eeked out a very small gain over September 81.6 for Oct vs 81.1 for Sept
Right now the raw uncorrected sunspot number for Oct is 34.7 After Correction is applied it will be either 23 or 24 which is a very small decrease from September's 25.2 .
The Smooth Sunspot Number for April 2010 should be dead on STAR's prediction of 13.9.
Overall I expected October to be a down month after a Late Summer and Early Fall run up.
I expect the increases to continue in November with the Monthly Number to be at the very least tickling 30. A big jump upward is possible with the Daily Spot Count regularly exceeding 75 by year's end.
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Post by af4ex on Nov 1, 2010 11:39:15 GMT
As 1117 slides out of view, one more (maybe the last) C-class flare today aound 0440Z, frame #36 on this Nobeyama movie: solar.nro.nao.ac.jp/norh/html/10mins/2010/11/01/movie.htmlThese daily plot and light curve summaries are very convenient for finding and localizing these flare events. Unfortunately, because Nobeyama is an Earth-based site, the coverage is less than 8 hours a day (1050Z - 0620Z) Leif, are there any other microwave sites with data like this?
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Post by lsvalgaard on Nov 1, 2010 14:00:24 GMT
As 1117 slides out of view, one more (maybe the last) C-class flare today aound 0440Z, frame #36 on this Nobeyama movie: solar.nro.nao.ac.jp/norh/html/10mins/2010/11/01/movie.htmlThese daily plot and light curve summaries are very convenient for finding and localizing these flare events. Unfortunately, because Nobeyama is an Earth-based site, the coverage is less than 8 hours a day (1050Z - 0620Z) Leif, are there any other microwave sites with data like this? bass2000.obspm.fr/home.phpbut they are not real time, so are often a week behind
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Post by af4ex on Nov 1, 2010 14:37:55 GMT
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Post by af4ex on Nov 1, 2010 15:07:58 GMT
... bass2000 is back on line. Wow, this radioheliograph generates images in the VHF (150.9 Mhz) and UHF (327 Mhz) spectrum! So a little fuzzier than the microwave stuff, but seems to contain some interesting phenomena. Is there any specific atomic/nuclear phenomenology being modeled here? bass2000.obspm.fr/home.php?end=1288536794But are these images oriented correctly? What is all that 'energy' in the South-West quadrant? The corresponding 25-Oct image from Nobeyama was pretty much blank. solar.nro.nao.ac.jp/norh/html/10mins/2010/10/25/movie.htmlAttachments:
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Post by af4ex on Nov 1, 2010 17:53:04 GMT
FYI, Did some Googling on 'radioheliograph' and found another instrument in India at Gauribidanur. Operated by the Indian Institute of Astrophysics: www.iiap.res.in/centers/radioIt uses a tee-shaped array of 192 log-periodic dipole antennas covering 40Mhz-150Mhz, with 5 arc min and .256 sec resolution. (Solar disk is about 30 arc min in diameter) "Daily images" here (but looks a little out of date): www.iiap.res.in/solarradioimages#heliogramThe terrestrial VHF spectrum tends to be quite noisy around urban areas due to 2-way communications, FM radio, TV, etc (including us Hams). I wonder how successful they are in suppressing this noise. I suspect some of the visible artifacts in these images may be terrestrial RF noise ("QRM").
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Post by Bob k6tr on Nov 2, 2010 7:01:55 GMT
The final numbers for October are in and STAR has revised upward it's projections for SSN over the next 5 months. May, Jume, July, August and October were upgraded by .1 percent. September was increased .2 Percent.
November was added with a projected SSN of 26.2 an increase of 3.0 over October.
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Post by af4ex on Nov 2, 2010 12:38:24 GMT
af4ex said: > I suspect some of the visible artifacts in these images > may be terrestrial RF noise ("QRM"). I think I was too hasty in my judgment, found this document which describes in detail how the signals are combined and calibrated to combat the ambient noise, which is very high. The artifacts in the published Gauribidanur images are really from the Sun (or nearby space) and have been cross-validated with similar detections from radioheliograph at Nançay. www.iiap.res.in/files/The%20Gauribidanur%20Radioheliograph.pdfAlso some more details about the operations of the instrument at Nançay. It has been used to observe coronal mass ejections (CME) extending out to several solar radii. www.obspm.fr/actual/nouvelle/aug01/rcme.en.shtml... and a snapshot of one arm of the array of the Nançay dish antennas: satorchi.net/nancay/rh/2010feb11/index.php?p2111143These VHF/UHF emissions are too low in frequency to represent individual atomic or nuclear transitions. Rather, they include much larger scale phenomenology, such as RF emissions from currents of relativistic electrons spiraling in the solar magnetic fields ("synchrotron" emissions). ... and thanks to the transparency of our atmosphere in the RF bands, these signals can all be observed while sitting on the ground. The x-ray and EUV emissions must be observed from space because the atmosphere is opaque to those frequencies.
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Post by af4ex on Nov 3, 2010 10:36:56 GMT
Old sunspot 1112 has just reappeared on the Southeastern limb and immediatlely popped off a C2.7 flare this morning between 0610Z and 0620Z. 1112 was the source of the M-class flare a few weeks ago. Looks like it will continue to be active. [Remark: Did I jump the gun on that one? Sure looked like the flare was coming out of old 1112] The Nobeyama microwave heliograph caught it just at the end of its 8-hour watch (frame #45 of 46) solar.nro.nao.ac.jp/norh/html/10mins/2010/11/03/movie.htmlAttachments:
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