The average daily sunspot numbers were up nine points to 25.3 for this week, compared to the May 20-26 period; the average daily planetary A index rose nearly 10 points to 14.3, and this rise in geomagnetic instability came with the increase in solar activity. Sunspot numbers for May 27-June 2 were 11, 12, 43, 40, 39, 14 and 18, with a mean of 25.3. The 10.7 cm flux was 72.7, 73.2, 73.7, 73, 72...
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