The K7RA Solar Update
09/29/2017
The past week was a good one for HF propagation. Average daily sunspot numbers doubled from the previous week, rising from 13.6 to 27, while average daily solar flux rose from 72.6 to 84.3. Average daily geomagnetic numbers were lower, with average planetary A index declining from 21.1 to 9.9 and average daily mid-latitude A index from 17.1 to 7.6.
Last Friday was the autumnal equinox, so we should see a seasonal improvement in HF conditions.
Predicted solar flux is 91 on September 29 to October 1, 89 on October 2-5, 90 on October 6-7, then 85, 76, 75, 74 and 73 on October 8-12, 72 on October 13-15, then 71, 74, 73, 78, 80, 87 and 90 on October 16-22, 95 on October 23 to November 2, then 90, 85, 76, 75, 74 and 73 on November 3-8 and 72 on November 9-11.
Predicted planetary A index is 28, 18, 14, 12 and 8 on September 29 to October 3, 5 on October 4-10, 25 on October 11-13, then 20 and 15 on October 14-15, 8 on October 16-17, 5 on October 18-21, then 16, 8, 20, 25, 20, 10 and 8 on October 22-28, 5 on October 29 through November 6, 25 on November 7-9, then 20, 15 and 8 on November 10-12.
“Geomagnetic activity forecast for the period September 29 to October 25, 2017 from OK1HH.
Geomagnetic field will be:
Quiet on October 6, 23
Mostly quiet on October 5
Quiet to unsettled October 3, 10, 16-21
Quiet to active on September 29-30, October 2, 4, 7-8, 11, 14-15, 22, 24
Active to disturbed on October 1, 9, 12-13, 25
Increases of solar wind, mostly from coronal holes, are expected on September 29 (-30), October (1, 3, 6,) 11-16, (17-18, 21-22, 24,) 25
Last Friday was the autumnal equinox, so we should see a seasonal improvement in HF conditions.
Predicted solar flux is 91 on September 29 to October 1, 89 on October 2-5, 90 on October 6-7, then 85, 76, 75, 74 and 73 on October 8-12, 72 on October 13-15, then 71, 74, 73, 78, 80, 87 and 90 on October 16-22, 95 on October 23 to November 2, then 90, 85, 76, 75, 74 and 73 on November 3-8 and 72 on November 9-11.
Predicted planetary A index is 28, 18, 14, 12 and 8 on September 29 to October 3, 5 on October 4-10, 25 on October 11-13, then 20 and 15 on October 14-15, 8 on October 16-17, 5 on October 18-21, then 16, 8, 20, 25, 20, 10 and 8 on October 22-28, 5 on October 29 through November 6, 25 on November 7-9, then 20, 15 and 8 on November 10-12.
“Geomagnetic activity forecast for the period September 29 to October 25, 2017 from OK1HH.
Geomagnetic field will be:
Quiet on October 6, 23
Mostly quiet on October 5
Quiet to unsettled October 3, 10, 16-21
Quiet to active on September 29-30, October 2, 4, 7-8, 11, 14-15, 22, 24
Active to disturbed on October 1, 9, 12-13, 25
Increases of solar wind, mostly from coronal holes, are expected on September 29 (-30), October (1, 3, 6,) 11-16, (17-18, 21-22, 24,) 25
http://www.arrl.org/news/view/the-k7ra-solar-update-493
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