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Post by lsvalgaard on Sept 2, 2010 3:31:32 GMT
Any chance 1101 is cycle 23 - jk? Magnetic and near the equator just seems odd. Is it more likely that reverse polarity sunspots are near the equator? 1101 is SC24. It has its positive polarity spread out a bit to its Northeast. It is not a reverse polarity spot. It is quite normal that the longest living spot in a group is the leader, and leaders in the Northern hemisphere for SC24 have negative polarity [black]. If anything, reversed polarity is more common at high latitude. It is also quite normal that a single spot 'accumulates' a faint ring of opposite polarity around it. |
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timb
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Post by timb on Sept 2, 2010 8:38:52 GMT
1101 is SC24. It has its positive polarity spread out a bit to its Northeast. It is not a reverse polarity spot. It is quite normal that the longest living spot in a group is the leader, and leaders in the Northern hemisphere for SC24 have negative polarity [black]. If anything, reversed polarity is more common at high latitude. It is also quite normal that a single spot 'accumulates' a faint ring of opposite polarity around it. I saw the northwest portion. What was intriguing was the spot started with as simple dipole with positive pole (white) due west. It was small though. It looks like that the positive pole has swung underneath the negative pole and is now due west. that seems to be the ring you mention. It was an interesting animation. It will be interesting to see if that eastern white area becomes more pronounced and if another negative region forms to complete the northwest dipole. |
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Post by af4ex on Sept 2, 2010 12:03:37 GMT
>> It was an interesting animation.
Where can we see this animation of 1101?
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timb
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Post by timb on Sept 2, 2010 23:43:03 GMT
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Post by George Kominiak on Sept 11, 2010 13:46:10 GMT
Hey Guys!
Now that my favorite patient is well on the road to recovery from her back surgery, I might be able to re-kindle some interest in things non-medical.
In the meantime, check out SOHO's "Pick of the week" when you get a chance.
G.
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Post by Bob k6tr on Sept 12, 2010 7:34:33 GMT
It looks like there is a region forming in the Northern Hemisphere at the same Longitude as 1106. It looks to be growing at a pretty healthy clip. We should know more in the morning.
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Post by fredfriendly on Sept 12, 2010 13:09:48 GMT
It looks like there is a region forming in the Northern Hemisphere at the same Longitude as 1106. It looks to be growing at a pretty healthy clip. We should know more in the morning. Good call, looks to be real and growing. |
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Post by Bob k6tr on Sept 12, 2010 22:39:53 GMT
It looks like there is a region forming in the Northern Hemisphere at the same Longitude as 1106. It looks to be growing at a pretty healthy clip. We should know more in the morning. Good call, looks to be real and growing. Sadly Fred it looks like it pooped Sunday Morning. Late Saturday Night a small spot showed on the SDO 4500 image. Now it is a spotless plague. This is not to say it could not start growing again but for now it looks like another dud. |
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Post by Bob k6tr on Sept 13, 2010 5:32:07 GMT
The new spot was assigned a number 1107.
Raben maps are reporting the new spot 1107 has shown zero growth over the last 24 hours and has a magnetic configuration of Alpha.
Raben is also reporting that 1106 is reporting growth of 25 to 50 percent over the last 24 hours and has a magnetic configuration of Beta.
Maybe we will get some action out of the Southern Hemisphere on this pass.
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Post by fredfriendly on Sept 16, 2010 9:36:03 GMT
Looks like a real sunspot coming over the southeatern limb. Magnetically complex and even a solar flare possibility.
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Post by af4ex on Sept 17, 2010 10:38:40 GMT
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Post by af4ex on Sept 19, 2010 12:25:56 GMT
Dr. Svalgaard, Is there any truth to the notion that, because of L&P fading, coronal holes will become the new 'sunspots' for us humans? But we'll have to don X-Ray glasses to see them  In any case you won't need much magnification to observe them. There seems to be mounting evidence that the solar wind is spawned from these regions: arxiv.org/PS_cache/arxiv/pdf/0912/0912.1246v1.pdfAccording to Deb Baker, "... line-of-sight velocities of the outflows have magnitudes of 10 to 50 km/s ...". What is the solar gravitional 'escape velocity' that allows these flows to become solar wind? Or is the launching mechanism more complex than simply surpassing escape velocity? |
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Post by snowman on Sept 19, 2010 17:32:50 GMT
Hope no one minds me asking a quick question - is it normal for the solar wind to be so low - there's several spots on the sun at the moment, admittedly a couple of them are pretty titchy, but the solar wind looks to be only ~300km/s - it seems to have dropped as 1108 has come more into view?
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Post by lsvalgaard on Sept 19, 2010 19:25:35 GMT
Dr. Svalgaard, Is there any truth to the notion that, because of L&P fading, coronal holes will become the new 'sunspots' for us humans? But we'll have to don X-Ray glasses to see them In any case you won't need much magnification to observe them. There seems to be mounting evidence that the solar wind is spawned from these regions: arxiv.org/PS_cache/arxiv/pdf/0912/0912.1246v1.pdfAccording to Deb Baker, "... line-of-sight velocities of the outflows have magnitudes of 10 to 50 km/s ...". What is the solar gravitional 'escape velocity' that allows these flows to become solar wind? Or is the launching mechanism more complex than simply surpassing escape velocity? We have known for 40 years that coronal holes are the sources of high-speed solar wind. L&P has little to do with this. |
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Post by af4ex on Sept 19, 2010 21:02:33 GMT
>> We have known for 40 years that coronal holes are the sources
>> of high-speed solar wind. L&P has little to do with this.
What about these 50 km/s outflows, are these significant discoveries?
I don't see much interest in coronal holes at this SC24 website, nobody seems to be very interested tracking them or observing their effect on band conditions. So my question was if you think more interest will be generated for coronal holes, if interest in sunspots 'fade' along with their contrast numbers?
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In any case you won't need much magnification to observe them.