The average daily sunspot numbers dropped from 50 (on the reporting week ending January 5) to 38 on January 6-12, and now 21.3 on January 13-19. Sunspot numbers for January 13-19 were 14, 11, 11, 15, 36, 34 and 28, with a mean of 21.3. The 10.7 cm flux was 79.5, 79.3, 80.2, 80.3, 81.8, 81 and 80.8, with a mean of 80.4. The estimated planetary A indices were 6, 7, 5, 3, 4, 3 and 6, with a mean o...
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