Sunspot activity rose this week, with the average daily sunspot numbers up more than 45 points to 97, while the average daily solar flux rose more than 24 points to 129.2. Sunspot numbers for October 11-17 were 82, 89, 85, 97, 119, 107 and 100, with a mean of 97. The 10.7 cm flux was 116.6, 121.9, 124.9, 132.1, 136.8, 137 and 135, with a mean of 129.2. The estimated planetary A indices were 6, ...
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