The K7RA Solar Update


Tad Cook, K7RA, Seattle, reports: It’s exciting to see increasing sunspot activity. Recently, Solar Cycle 25 often creates new sunspots and I watch them appear every day New sunspots appeared on July 14, 16, 17, 19 and 20, and two new ones appeared on July 21. this image since July 22, our sun has been dotted with spots reminding me of past solar cycles.

The average daily sunspot numbers doubled more than 21.3 last week to 48.9 this week, July 15-21. The average daily solar flux jumped from 72.9 to 81.3.

Geomagnetic numbers are stable, with an average latitude and planetary index A averaging 6.4.

The forecasted solar flux is 89 and 87 on July 23-24; 85 on July 25-30; 90 on July 31 – August 1; 85 on August 2; 75 on August 3-12; 78, 80 and 80 on 13 – 15 August; 85 on 16 – 21 August and 90 on 22 – 28 August.

The projected planetary index A is July 18, 16 and 8 on July 23-25; 5 on July 26 – 27; 8 on July 28; 5 on July 29 – August 1; August 8; August 5 – 9; 12 and 10 on 10 – 11 August; 5 on 12 – 16 August; 8 on 17 – 18 August; 5 on 19 – 28 August and 8 on 29 August.

FK Janda, OK1HH, sent this forecast for geomagnetic activity for July 23 – August 19, before taking a week off.

The geomagnetic field will be:

  • quietly on: 25, 30 July, 7, 12 – 13 August
  • quietly to unsettled on: 24, 28 – 29, 31, 9, 14 August
  • quiet to active on: 23, 26 July, 1, 3 – 6, 11, 15 – 17, 19
  • unsettled to active: July 27, 2, 8, 10, August 18
  • active to impaired: No predictions!


= Brackets mean less likely to improve performance.

= Next Thursday I will not make a forecast for the activity of the Earth’s magnetic field, because I will walk on the highest mountains of my country – the Giant Mountains – without such amenities of civilization as a computer or the Internet. But I will have good friends, a camera and binoculars with me!

OH6BG has several interesting links to VOACAP profile.

I had fun using remote SDR receivers for hunting for 10-meter beacons during the day. This revealed much more sporadic reproduction than I knew before.

On Thursday, using AB9MQ receiver in Normal, Illinois, copied the KE5JXC / b beacons in Kaplan, Louisiana, on 28.2515 MHz; WD8INF / b in Lebanon, Ohio, at 28.2525 MHz, and KC5SQD / b in Missouri City, Texas, at 28.2508 MHz.

You will notice on 10-meter list of beacons from WJ5O that the lists are decided at 100 Hz instead of 1 KHz. This allows more of them to be brought together in the group. All three beacons mentioned here have been copied with the receiver tuned to the same frequency, and because they transmit at slightly different frequencies, they are easy to copy.

Correction: I mentioned my new CW beacon, K7RA / b on 28.2833 MHz in last week’s report. The output power is actually 11 W, as I was reminded by UY5DJ / AA7DJ, which generously built the transmitter and beacon controller.

N8II in West Virginia, writes:

“It was very intense sporadically, especially in the US and Canada on July 13-15 with double hop to MT, UT, WA, OR, BC, CA, NV and AZ.

“Several times the bandwidth has been reduced to stations less than 300 miles away in NC, SC, KY and OH. I easily made over 100 QSOs. I worked Steve, VE2CSI, in Sept-Iles, Quebec (FO60), several times at 10 meters and once at 6 meters, all SSB.

“Things were pretty quiet until July 18, when Europe went well through 10, starting shortly after 1200 UTC, operating 9A2U, Croatia, and Vlada, YU4VLA, Serbia, along with Italy, Bulgaria, Switzerland, Belgium, Scotland and several German stations. 1319 UTC.

“Exactly after 0000 UTC on July 19, 10 meters come to life with SSB activity from Maine and the 4th zone of the USA. I found TI5KMK in Costa Rica, probably in Es, and also in Puerto Rico. Suddenly, on July 21, stations appeared in the state of New York and New England with large signals, starting at 2214 UTC. The French stations F6ARC and F4AIF were opened around 2240 UTC.

“July 22 marks one of the best openings of the year for Western Europe in the 10 meters. I did a lot of stations on 28.430 MHz SSB after calling EI2IP and EI3GD in Ireland, starting from 1941 UTC. The signal levels were very good and many stations were active. The focus was on SE5S and Hawk, SM5AQD, both in Sweden. The SM5AQD was on top of the 1500-watt S-9 to a triple pile of eight-element three-band Yagis. Soon after, MM0TFU in Scotland called with a slightly better signal. As I recall, it puts 400 W in a three-cell Yagi. This was the loudest Ian this year after several 10-meter QSOs. Around 0040 UTC, I was running WA2OOO on Long Island, New York, less than 300 miles away, with a strong signal, and VO1VXC in Newfoundland. “

here it is the latest video (July 17) by Space Time Woman Tamita Skov, WX6SWW.

The sunspot numbers for July 15-21 were 22, 35, 53, 42, 45, 59 and 86, with an average of 48.9. The 10.7 cm flux was 73.5, 75, 77.4, 80.4, 82.6, 87 and 93.5, with an average of 81.3. The expected planetary indices A were 10, 4, 4, 4, 7, 10 and 6, with an average of 6.4. The average width index A is 12, 5, 4, 5, 4, 9 and 6, with an average value of 6.4.

For more information on radio broadcasting, visit the ARRL Technical Information Office, Read “What do the numbers mean …” and check this distribution page.

Reproduction bulletin archive is available. For customizable distribution diagrams, visit VOACAP online for radio Ham website.

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Title Yours reports and observations.