The K7RA Solar Update 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 of 4.9. The estimated
mid-latitude A indices were 4, 6, 2, 3, 4, 3 and 5, with a mean
of 3.9. The average weekly solar flux over the same three
periods dropped from 89.5 to 83.8 to 80.4 over this past week.
The latest solar flux prediction shows a value of 82 for January
21-27 and 88 on January 28-30, followed by 87, 85, 85, 84 and 84
on January 31-February 4. Geomagnetic predictions have the
planetary A index at 5 over the next couple of weeks, except for
a value of 7 on January 22 and February 2-4. Geophysical
Institute Prague expects quiet conditions on January 21, quiet
to unsettled January 22 a