The K7RA Solar Update
Sunspot numbers were lower for the past week, compared to the previous period. The average daily sunspot numbers fell nearly 11 points to 16.1. Sunspot numbers for June 17-23 were 14, 16, 28, 13, 14, 14 and 14, with a mean of 16.1. The 10.7 cm flux was 70.4, 70.5, 68.9, 70, 72, 73.3 and 74, with a mean of 71.3. The estimated planetary A indices were 10, 5, 4, 3, 5, 6 and 4, with a mean of 5.3. …
Filed under: ARRL News by Mr. Roboto