The K7RA Solar Update
04/30/2021
Tad Cook, K7RA, Seattle, reports: Sunspots have continued to appear every day after April 11 — the last day with no sunspots.
Average daily sunspot number rose this week from 35.1 to 47.6, and average daily solar flux also rose, from 78 to 79.2.
Geomagnetic indicators were quieter, with average daily planetary A index declining from 16.4 to 10.7. The most active day was April 25 with a planetary A index of 20.
Predicted solar flux over the next month is 77, 75, and 72 on April 30 – May 2; 70 on May 3 – 6; 72 on May 7 – 9; 73 on May 10 – 11; 74 on May 12 – 13; 77 on May 14; 79 on May 15 – 23; 78 on May 24 – 2, and 75 and 73 on May 28 – 29.
Predicted planetary A index 8 on April 30 – May 1; 15, 12, 12, and 8 on May 2 – 5; 5 on May 6 – 10; 8, 12, 20, and 30 on May 11 – 14; 15 on May 15 – 16; 12 on May 17; 5 on May 18 – 19; 15 and 10 on May 20 – 21; 5 on May 22 – 28, and 15, 12, and 10 on May 29 – 31. After that, things are quiet over the first week of June.