Six new sunspot groups emerged over this reporting week, November 30 to December 6, 2023.
Using the previous week’s bulletin as a template, last week’s averages were not updated, although all the correct data was there. This week’s bulletin includes the updated averages from last week.
Instead of 83.3 being the average daily sunspot number, it was actually 165.9, which dropped this week to 121.1.
Instead of an average daily solar flux of 146, it was actually 181.5, which declined this week to 146.5.
Instead of the average daily planetary A index of 10.1, it was actually 11.6, which rose this week to 17.1. Instead of the average middle latitude A index of 7.3, it was 9, which rose this week to 11.4.
Predicted solar flux is 130, 135, 135, and 140 on December 7 – 10; 130 on December 11 – 13; 140 on December 14 – 16; 150 on December 17; 160 on December 18 – 26; 155, 150, 145, and 140 on December 27 – 30; 136, 134, and 130 on December 31 through January 2, 2024, and 132 on January 3 – 5.
Predicted planetary A index is 8 on December 7; 5 on December 8 – 10; 8 on December 11 – 12; 5 on December 13 – 17; 15, 25, 8, 5, 20, and 10 on December 18 – 23; 5 on December 24 – 30; 25, 10, and 8 on December 31 through January 2, 2024, and 5 on January 3 – 6.
Read about a big hole in the sun at https://bit.ly/41adYDC and the sun’s new active region at https://bit.ly/3RxtCWG.
Don’t
forget, the ARRL 10-Meter Contest is this weekend. Visit https://www.arrl.org/10-meter to learn
more.
Sunspot numbers for
November 30 through December 6, 2023, were 138, 140, 92, 107, 113, 133, and
125, with a mean of 121.1. The 10.7-centimeter flux was 166.5, 162, 148.2,
139.2, 137.8, 141.6, and 129.9, with a mean of 146.5. Estimated planetary A
indices were 5, 56, 14, 11, 9, 15, and 10, with a mean of 17.1. Middle latitude
A index was 4, 30, 11, 10, 9, 9, and 7, with a mean of 7.3.