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This week the Sun has given us a tremendous amount of activity in
the form of large solar flares. A geomagnetic storm is still in
progress, and the planetary A index from Saturday through Thursday,
was 30, 105, 66, 51, 25 and 43. These are high numbers. The average
planetary A index for this week more than doubled to 43R1. Average
daily sunspot numbers more than quadrupled to 71R1.  These numbers
compare the 7 days ending Wednesday with the previous 7 day period.
Next week is the Northern Hemispheres Autumnal Equinox. This period
could be a good one for HF propagation if solar flares quiet down
and the sunspot count doesnt sink back toward 0. The sunspot number
rose above 100 on Sunday, September 11, the first time since August
3. Although not aimed at Earth, that day it produced an X17 solar
flare, the fourth largest detected over the past three decades. Over
the next week it produced 8 more flares, each causing HF radio
blackouts. Sunspot numbers were 36, 59, 59, 101, 62, 95 and 86 with
a mean of 71R1. 10R7 cm flux was 94R1, 99, 116, 109R7, 118, 114, and
116R6, with a mean of 109R6. Estimated planetary A indices were 8,
17, 30, 105, 66, 51 and 25 with a mean of 43R1. Estimated mid
latitude A indices were 5, 12, 15, 53, 32, 26 and 13, with a mean of
22R3‚

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