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Post by sunspotboy on Aug 31, 2011 7:34:01 GMT
20 nhz for 07:27 wa -5Nf
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Post by lsvalgaard on Aug 31, 2011 12:42:15 GMT
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Post by Bob k6tr on Sept 1, 2011 1:24:15 GMT
Leif here is something to consider.
NOAA has just issued their Solar Region Summary Report for Sept 1. The Sunspot count is 121. Accord to the Old Formula that I have (not yours) the SFI should be 165. Instead it actually measures 109. That isn't off-kilter it's out of the ballpark.
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Post by lsvalgaard on Sept 1, 2011 4:36:43 GMT
Leif here is something to consider. NOAA has just issued their Solar Region Summary Report for Sept 1. The Sunspot count is 121. Accord to the Old Formula that I have (not yours) the SFI should be 165. Instead it actually measures 109. That isn't off-kilter it's out of the ballpark. I think your formula uses the SIDC sunspot number which is 85 for August 31st... And you should use the 'adjusted' SFI which was 111. |
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Post by elbuho on Sept 2, 2011 22:50:17 GMT
On August 14 there was a ssn = 0 reported by the SIDC.
Will this SSN=0 also be considered fully normal in this solar maximum?
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Post by lsvalgaard on Sept 3, 2011 3:45:40 GMT
On August 14 there was a ssn = 0 reported by the SIDC. Will this SSN=0 also be considered fully normal in this solar maximum? Yes, a single day like that could still occur. Compare with SC14:  |
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Post by justsomeguy on Sept 3, 2011 7:23:17 GMT
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Post by lsvalgaard on Sept 3, 2011 14:35:43 GMT
Both Schrijver and Foukal are good scientists and I know them very well personally. The issues raised are not resolved at this time and are ongoing research. |
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Post by justsomeguy on Sept 4, 2011 23:18:53 GMT
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Post by jamesjjlm on Sept 6, 2011 20:30:45 GMT
You mentioned that large flare or CME events can happen despite the low magnetism and lower cycle. In fact, many of the largest events happened during smaller maximum cycles.
(This is kind of a hard question to word, so forgive me in advance.)
Is this because the sun kind of builds up energy? Which if not released in smaller events, it results in one large event?
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Post by lsvalgaard on Sept 7, 2011 1:41:45 GMT
After sunspot minimum TSI does rise, so, yes. |
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Post by lsvalgaard on Sept 7, 2011 1:43:56 GMT
You mentioned that large flare or CME events can happen despite the low magnetism and lower cycle. In fact, many of the largest events happened during smaller maximum cycles. (This is kind of a hard question to word, so forgive me in advance.) Is this because the sun kind of builds up energy? Which if not released in smaller events, it results in one large event? The standard 'explanation' is that large events require twisting of magnetic flux. If there is too much flux from other regions around or nearby, the region might blow before twisting very much. |
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Post by af4ex on Sept 7, 2011 15:24:07 GMT
@maui > WOW!! ... [SF hitting 128] May be that Cycle 24 is getting ready for its next big spike, following the general crescendo pattern established by Cycle 14, a spike every 6 months or so, each getting bigger until the solar max. If so, I'd expect this spike to exceed the February spike (with maybe a hiccup on the way up). Dr. Svalgaard, The 'hiccup' has occurred (see below), SF=150. I think we're on the next big SC24 spike. Do you agree? Attachments:
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Post by lsvalgaard on Sept 7, 2011 15:30:58 GMT
@maui > WOW!! ... [SF hitting 128] May be that Cycle 24 is getting ready for its next big spike, following the general crescendo pattern established by Cycle 14, a spike every 6 months or so, each getting bigger until the solar max. If so, I'd expect this spike to exceed the February spike (with maybe a hiccup on the way up). Dr. Svalgaard, The 'hiccup' has occurred (see below), SF=150. I think we're on the next big SC24 spike. Do you agree? Yes, there will be several such in the years to come. |
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timb
New Member
Posts: 45 
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Post by timb on Sept 7, 2011 23:10:59 GMT
Question on axial tilt of the sun: It's about 7 degrees from the ecliptic. In what season of the earth does the northern hemisphere of the sun face most towards the earth? Also, since sunspots and CME's are not equal across the equator, do we have seasons of events depending on this? Does the solar wind have seasons based on tilt?
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