‰ Now 18 WPM transition file follows ‰

Solar activity picked up over the seven days of our reporting week,
October 3 to 9, and the outlook has improved somewhat. There now are
no predictions for the solar flux dropping below 100 in the next 45
days. October 6 was the date of the last forecast predicting any
flux values below 100. These predictions were for periods later in
October and again in November.  Average daily sunspot numbers
increased by 47 points to 79, and average daily solar flux increased
3.8 points to 110.4. These averages compare the recent October 3 to
9 period with the previous seven days, September 26 through October
2.  The latest prediction for solar flux is 125 on October 11 to 13,
120 on October 14 to 16, 115 on October 17, 105 on October 18 to 23,
100 on October 24 to 29, 105 on October 30 and 31, 100 on November 1
and 2, 105 on November 3 and 4, 100 on November 5 and 6, and 105 on
November 7 to 15.  Predicted planetary A index is 10 on October 11
and 12, 5 on October 13, 8 on October 14 and 15, 10 on October 16, 8
on October 17, 5 on October 18 to 20, 10 on October 21, 5 on October
22 to November 6, 10 on November 7 and 8, and 8 on November 9 to 12.
OK1HH predicts geomagnetic activity as quiet to unsettled October
11, mostly quite October 12, quiet October 13, quiet to unsettled
October 14 to 16, quiet to active October 17 and 18, quiet October
19 and 20, quiet to active October 21, mostly quiet October 22,
quiet October 23 to 27, quiet to active October 28, and active to
disturbed October 29 and 30.  NBC news has an article about Tuesdays
solar flare, which was strong considering how quiet the Sun has been
lately, but was not aimed directly at earth. Planetary A index rose
to 24 on Wednesday, October 9, and Alaskas college A index hit 40.
For more information concerning radio propagation, see the ARRL
Technical Information Service web page.  A detailed explanation of
the numbers used in this bulletin is also available on this site.
An archive of past propagation bulletins is also available.  Sunspot
numbers were 61, 84, 69, 53, 76, 99, and 111, with a mean of 79.
10.7 cm flux was 113.8, 109.1, 105.9, 106.5, 112, 111.9, and 113.4,
with a mean of 110.4. Estimated planetary A indices were 6, 2, 1, 2,
6, 16, and 24, with a mean of 8.1. Estimated mid latitude A indices
were 5, 2, 2, 3, 8, 12, and 21, with a mean of 7.6.

‰ End of 18 WPM transition file ‰