ZCZC AP35
QST de W1AW
Propagation Forecast Bulletin 35 ARLP035
From Tad Cook, K7RA
Seattle, WA August 28, 2020
To all radio amateurs
SB PROP ARL ARLP035
ARLP035 Propagation de K7RA
Our closest star seems to have quieted again. We have now experienced seven consecutive days with no sunspots at all.
Average daily sunspot number dropped from 5.4 to 1.9 this week, and average daily solar flux declined from 71 to 70.4. Geomagnetic indicators increased marginally, with average daily planetary A index going from 4.4 to 5.1, and average middle latitude A index from 5 to 6.
Predicted solar flux is 70 on August 28 to September 3, 71 on September 4, 72 on September 5 to 9, 71 on September 10 to 16, 70 on September 17 to 27, 71 on September 28 to 30, 72 on October 1 to 6, and 71 on October 7 to 11.
Predicted planetary A index is 8, 10, 12 and 8 on August 28 to 31, 5 on September 1 to 17, 8 on September 18 and 19, then 10, 15 and 10 on September 20 to 22, then 5, 10, 12 and 18 on September 23 to 26, 15 on September 27 and 28, 12 on September 29, and 5 on September 30 to October 11.
OK1HH is on his annual hiatus, so no geomagnetic prediction from him this week. Instead, we present a much more limited forecast from Tomas Bayer of the Budkov Observatory.
“Geomagnetic activity forecast for the period August 28 to September 03, 2020
Quiet: August 27, September 1 to 3
Unsettled: August 27 to 31, September 1 and 2
Active: Possibly on August 30 and 31
Minor storm: 0
xhMajor storm: 0
Severe storm: 0
Geomagnetic activity summary:
Friday, August 28, we expect at most quiet conditions. On the same day, in the evening, more unsettled conditions are possible.
The most unsettled conditions are expected during the coming weekend, August 29 and 30. The unsettled stage can also peak by any isolated active event.
From Monday, August 31, we expect waning of the unsettled conditions to the quiet to unsettled level. The first three days of September, we expect quiet conditions to return.”
Now, since sunspots are fading (I assure you this is temporary) we have received another of the occasional reports from Cycle 19.
“I love reading your weekly prop report hoping to see the beginning in the new cycle. So far, not much news, so I reminisce about that fantastic cycle 19. Not many active hams have lived through the cycle, but I did. I would love for everyone to experience another cycle 19 in the next 10 years.
I received my novice license in 1954 at the age of 16. My station was an S38 and a homemade 6V6 xmtr on 80 meters, crystal controlled. Later I was given a 40 meter crystal and I enjoyed more distant QSOs. One night I was called by a very strange call and I learned that I was talking to CM7JA in Camaguey, Cuba. My first DX and I was hooked. I built a mighty Heathkit AT1 and moved to 15 meters in my quest for DX. Hawaii was my 1st DX on 15. Novices were allowed on 80, 40, and 15 at that time, crystal controlled only.
I received my General class license in 1955, built a Heathkit VFO. Now I was set for DX. In late 1954 the SSN was bouncing around 5, good for 80 and 40. In late 1955 the SSN was bouncing around 70 and 20, 15, and 10 were alive with signals from everywhere. I was in hog heaven! I upgraded to an NC-98 receiver and a Globe scout transmitter and in late 1956 the SSN was about 160, I thought DX could not be better than this.
But it did! I built a homemade 10 meter beam made from bamboo poles wrapped in aluminum foil and could contact anyone I could hear. By the end of 1957 the SSN was 200 with excursions to 250. All the high bands (20, 15, and 10) were open all night long! Ten watts and a wet string could work the world. It was fantastic! Most of my operation was on CW with an occasional QSO on AM if I heard a new one.
By 1958 school and girls competed with radio for my attention, but I always found some time to operate. SSN was still up around 160. Soon it was graduation, job, marriage, and kids but I always found time to flip the new and improved rig on. I was also working on getting those elusive QSL cards to improve my DXCC standing.
Now at 82 yo I am still working DX but mostly on FT8 and I am looking forward to an exciting cycle 25. I hope y’all can experience what I did.”
Thanks, Bill for the report from the middle of the 20th century! Nice to hear of a Yagi built from bamboo poles wrapped in aluminum foil.
I hope we see more sunspots soon, and one thing we have to look forward to currently is improved propagation due to seasonal effects. We are just a few weeks away from the autumnal equinox.
A new video from WX6SWW, Dr. Tamitha Skov, the Space Weather Woman:
https://youtu.be/CnNpWD5UzVs
If you would like to make a comment or have a tip for our readers, email the author at k7ra@arrl.net.
For more information concerning radio propagation, see the ARRL Technical Information Service web page at, http://arrl.org/propagation-of-rf-signals. For an explanation of numbers used in this bulletin, see http://arrl.org/the-sun-the-earth-the-ionosphere.
An archive of past propagation bulletins is at http://arrl.org/w1aw-bulletins-archive-propagation. More good information and tutorials on propagation are at http://k9la.us/.
Monthly propagation charts between four USA regions and twelve overseas locations are at http://arrl.org/propagation.
Sunspot numbers for August 20 to 26, 2020 were 13, 0, 0, 0, 0, 0, and 0, with a mean of 1.9. 10.7 cm flux was 69.9, 70.9, 70, 70.6, 70.3, 70.6, and 70.4, with a mean of 70.4. Estimated planetary A indices were 3, 4, 8, 7, 3, 4, and 7, with a mean of 5.1. Middle latitude A index was 4, 5, 13, 7, 3, 3, and 7, with a mean of 6.
NNNN
/EX
Source: W1AW Bulletin via the ARRL.