Average solar flux and sunspot numbers went down this week. Sunspot numbers are down by half, from 112.6 last week to 53.4 this week. Average daily solar flux declined from 156.1 to 132.5.
Geomagnetic indicators also declined this week. The average daily planetary A index went from 23.3 last week to 15 this week. Average daily middle latitude A index went down from 13.7 to 11.7.
The middle latitude A index for April 1 was not available, so my guess for it is 11.
Predicted solar flux is 140 on April 6 – 8; 135 on April 9 – 11; 140 on April 12 – 13; 130 on April 14; 135 on April 15 – 17; 140 on April 18 – 20; 135 on April 21 – 23, then 130, 125, and 120 on April 24 – 26; 115 on April 27 – 29; 125 on April 30; 120 on May 1 – 2; 115 on May 3 – 4, and 110 on May 5 – 7.
Predicted planetary A index was 8 on April 6; 5 on April 7 – 10, then 8, 8, and 5 on April 11 – 13; 8 on April 14 – 15, then 12, 10, and 15 on April 16 – 18, then 5, 20, 15, and 10 on April 19 – 22; 5 on April 23 – 25, then 15 and 18 on April 26 – 27; 15 on April 28 – 29; 8 on April 30; 10 on May 1 – 2; 8 on May 3, and 5 on May 4 – 6.
This video from Tamitha Skov features flares and wind, and came out right after last week’s bulletin:
Sunspot numbers for March 30 through April 5, 2023, were 99, 61, 23, 54, 56, 44, and 37, with a mean of 53.4. 10.7-centimeter flux was 140.3, 129.3, 125.3, 126.9, 133.6, 135.7, and 136.6, with a mean of 132.5. Estimated planetary A indices were 17, 21, 13, 15, 15, 13, and 11, with a mean of 15. Middle latitude A index was 11, 17, 11, 13, 11, 10, and 9, with a mean of 11.7.