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The K7RA Solar Update


This was one of those confounding weeks when the average daily sunspot number was down, while the average daily solar flux rose. Compared with the previous seven days, for November 6-12 average daily sunspot number declined 10.7 points to 85, while average daily solar flux rose 11.5 points to 139.4.

The latest prediction from the USAF/NOAA 45 day outlook has solar flux at 165 on November 14, 180 on November 15-16, then 185, 190, 195, 200 and 195 on November 17-21, then 190, 170, 150, 135 and 125 on November 22-26, 105 on November 27-28, 100 on November 29-30, 90 on December 1-3, and bottoming out at 80 on December 5. It then rises to a short term maximum of 200 on December 16-17 before dropping below 100 by the end of the year.

Predicted planetary A index is 8 on November 14-15, 12 on November 16-18, 10 on November 19, 8 on November 20-21, 12 on November 22-24, 8 on November 25, and 5 on November 26-29. It then rises to a high of 22 on December 6 and again on December 26.

Petr Kolman, OK1MGW, of the Czech Propagation Interest Group has a geomagnetic forecast for us. He sees the geomagnetic field quiet to unsettled November 14-15, active to disturbed November 16, quiet to active November 17-19, mostly quiet November 20-21, quiet to active November 22, quiet to unsettled November 23-24, quiet to active November 25, mostly quiet November 26, quiet November 27-30, active to disturbed December 1, quiet on December 2-3, quiet to unsettled December 4-6, quiet to active December 7, quiet to unsettled December 8, and mostly quiet December 9-10.

Pete Heins, N6ZE, of Thousand Oaks, California sent this report of a 6 meter opening:

“There was an extensive F-2 opening on Monday afternoon, 10 November 2014. I worked ZL1RS (6470 mi) in New Zealand & CX7CO (6259 miles) in Uruguay. I also had a QSO with KH6HI (2537 miles) near Honolulu, HI for new grid, BL01, on 6 meters from my DM04ne QTH in SoCal.”

Later he wrote, “Actually, I discovered that I have worked BL01 in the past! I run 100 W to a 5 element Yagi at about 15 feet above ground level with lots of nearby obstructions.”

Jon Jones, N0JK, of Lawrence, Kansas wrote about the same six meter opening:

“On the afternoon of November 10, the 6 meter band opened between Hawaii and the mainland states starting around 2000z.

“I worked Jim KH6/K6MIO grid BK29 at 2132z from Lawrence, KS on 50.120 MHz. I received a 52 report from Jim. He had a big pileup calling and heavy QSB - up well over S-9, then down in the noise, then back. I also heard him work fellow locals N0CWR and N0XA. I heard KH6U on 50.115 but very weak.

“I had been out with our 3 year old granddaughter at a church playground in Lawrence that afternoon. I happened to check my cell phone and saw the spots for the Hawaiian stations on 6. I packed her up and went back home - we live 5 minutes away. I listened first on the home setup - (dipole in attic) and heard K6MIO/KH6 on 50.120. I had just moved the dipole to favor propagation to the Pacific rather than South America last week. After I worked Jim I went portable. Jim was Q5, S1 to 2 on just a whip antenna, but band dropped by the time I got the Yagi up. I missed KH7Y while I was putting the antenna and masts in the car. KH7Y worked N0XA and N0CWR (plus many others).

“This may be been the first F2 opening from the Midwest to Hawaii in Solar Cycle 24. The last one I worked was November, 2001. The geomagnetic field was active on the 10th.”

Here is another article with an update on that recent monster sunspot:

In this video, it looks to me like the sun is rotating backward, although a reader comment shows that at least one reader sees it rotating in the correct direction, left to right:


Don’t forget the ARRL SSB Sweepstakes this weekend. Details are here:

Here is a YouTube recording of WA2TPU working a couple of stations in South Africa while running 5 W, although it is not clear if they are on 15 or 20 meters:

For more information concerning radio propagation, see the ARRL Technical Information Service at For an explanation of the numbers used in this bulletin, see An archive of past propagation bulletins is at More good information and tutorials on propagation are at

Monthly propagation charts between four USA regions and twelve overseas locations are at

Instructions for starting or ending email distribution of ARRL bulletins are at

Sunspot numbers for November 6 through 12 were 107, 96, 92, 78, 63, 70, and 89, with a mean of 85. 10.7 cm flux was 135.5, 145.5, 132, 131.7, 136.1, 142.3, and 152.9, with a mean of 139.4. Estimated planetary A indices were 9, 12, 8, 9, 23, 12, and 8, with a mean of 11.6. Estimated mid-latitude A indices were 8, 10, 8, 8, 16, 9, and 6, with a mean of 9.3.




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