Solar activity increased this week. The average daily sunspot number rose from 68 to 112.6, and the average daily solar flux changed from 145.6 to 156.1.
Due to solar wind at the beginning of the reporting week, average daily planetary A index increased from 10.6 to 23.3, while average middle latitude A index went from 8.4 to 13.7. Many reports of aurora came in this week, some down to lower latitudes in North America.
Predicted solar flux is 150 on March 30 through April 1; 140 on April 2 – 3; 130 on April 4 – 5; 132 on April 6 – 8, then 130, 132, 135, and 135 on April 9 – 12, then 140, 145, and 148 on April 13 – 15, then 150, 150, 155, 155, and 158 on April 16 – 20; 160 on April 21 – 23, then 155, 145, and 145 on April 24 – 26, and 135 on April 27 through May 1.
Predicted planetary A index is 18 on March 30 – 31, then 16, 12, 10, and 8 on April 1 – 4, then 5 on April 5 – 9, then 15, 12, 8, and 5 on April 10 13; 8 on April 14 – 15, then 12, 20, 15, and 5 on April 16 – 19, then 20, 15, and 10 on April 20 – 22; 8 on April 23 – 24; 5 on April 25 – 26, then 12, 15, 10, and 8 on April 27 – 30.
Sunspot numbers from March 23 through 29, 2023, were 73, 108, 105, 125, 128, 114, and 135, with a mean of 112.6. 10.7-centimeter flux was 151, 157.5, 160.3, 159.4, 158.2, 158.7, and 147.8, with a mean of 156.1. Estimated planetary A indices were 60, 66, 15, 8, 3, 5, and 6, with a mean of 23.3. Middle latitude A index was 28, 40, 12, 6, 2, 4, and 4, with a mean of 13.7.