The K7RA Solar Update

[American Radio Relay League | Ham Radio Association and Resources]

Tad Cook, K7RA, Seattle, reports: Finally, sunspots have returned! Two sunspots now are visible, both from new Solar Cycle 25. The daily sunspot number was 11 for July 21-27, rising to 22 for July 28-30.

Recently, we have noticed an improvement in propagation due to seasonal sporadic-E activity.

Average daily sunspot numbers rose from 3.1 to 14.1 this week, and average daily solar flux edged up f...

http://www.arrl.org/news/view/the-k7ra-solar-update-639

[American Radio Relay League | Ham Radio Association and Resources]

Tad Cook, K7RA, Seattle, reports: New Sunspot Cycle 25 continues to make a strong showing. Sunspots have appeared on every day for more than 3 weeks. Average daily sunspot numbers for the week slipped a bit from 19.6 to 14.3 this week, but average daily solar flux increased from 72.8 to 73.8. Geomagnetic indicators remain quiet. Both the average daily planetary and mid-latitude A index were 3.7...

http://www.arrl.org/news/view/the-k7ra-solar-update-641

[American Radio Relay League | Ham Radio Association and Resources]

http://www.arrl.org/news/view/the-k7ra-solar-update-642

[American Radio Relay League | Ham Radio Association and Resources]

Tad Cook, K7RA, Seattle, reports: Our closest star seems to have quieted again. We have now experienced 7 consecutive days with no sunspots.

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 ind...

http://www.arrl.org/news/view/the-k7ra-solar-update-643

[American Radio Relay League | Ham Radio Association and Resources]

[American Radio Relay League | Ham Radio Association and Resources]

Tad Cook, K7RA, Seattle, reports: As of Thursday night, no sunspots have appeared for the past 13 days. I know we are all hoping for more sunspots, and I'm sure they'll be returning soon; the trends for this newly awakening solar cycle favor it. One event to look forward to this month is the autumnal equinox on Tuesday, September 22, which should favor worldwide HF propagation.

Average daily sol...

http://www.arrl.org/news/view/the-k7ra-solar-update-644

[American Radio Relay League | Ham Radio Association and Resources]

[American Radio Relay League | Ham Radio Association and Resources]

Tad Cook, K7RA, Seattle, reports: An extended lull in solar activity persists. The smoothed sunspot minimum occurred last December, but the flurry of moderate sunspot activity in August has not continued.

An event to look forward to is the autumnal equinox, which occurs at 1330 UTC on Tuesday, September 22. We should see a seasonal improvement in HF propagation around that date because the north...

http://www.arrl.org/news/view/the-k7ra-solar-update-645

[American Radio Relay League | Ham Radio Association and Resources]

Tad Cook, K7RA, Seattle, reports: Lots of news lately about the solar cycle, but no sunspots. Today, September 18, is the 29th consecutive day with no sunspots.

The news this week was about the Solar Cycle 24 minimum, announced recently as having occurred during December 2019 and indicating the start of Solar Cycle 25. The reason that announcement is just coming out now has to do with the nature...

http://www.arrl.org/news/view/the-k7ra-solar-update-646

[American Radio Relay League | Ham Radio Association and Resources]

Tad Cook, K7RA, Seattle, reports: Up until September 23, we saw 32 consecutive days with no sunspots. Then new sunspot group AR2773 appeared, which has a magnetic signature indicating it's part of new Solar Cycle 25. Spaceweather.com noted it was a weak one, and may not persist for long. The daily sunspot number for September 23 was 13, indicating three sunspots visible in that group, but the s...

http://www.arrl.org/news/view/the-k7ra-solar-update-647

[American Radio Relay League | Ham Radio Association and Resources]

http://www.arrl.org/news/view/the-k7ra-solar-update-648