Because of the Thanksgiving holiday, this bulletin preview is moved back a day and does not have the full Thursday-through-Wednesday data; that will appear in Friday’s bulletin.
Last weekend, conditions during the ARRL November Phone Sweepstakes were great because geomagnetic activity was so low. Planetary A index was 3 and 4, and even high-latitude indicators were low. Alaska’s college A index was 2 and 1.
Solar activity has been up for the past few days. Starting on November 17, a new sunspot group appeared every day, and on Monday, November 20, six new sunspot groups emerged. Sunspot numbers on Monday and Tuesday were 127 and 138, which is the first time the daily sunspot number has been more than 100 since November 3.
Predicted
solar flux is 172, 175, and 177 on November 22 – 24; 180 on November 25 – 27;
185 on November 28 – 29; 155 on November 30 – December 1; 150, 152, 148, and
145 on December 2 – 5; 140 on December 6 – 8; 145 on December 9 – 10, and 140
on December 11 – 17.
Predicted planetary A index
is 14, 12, and 8 on November 22 – 24; 5 on November 25 – 26; 10 and 8 on
November 27 – 28; 5 on November 29 – December 3; 12, 16, 12, and 10 on December
4 – 7; 5 on December 8 – 11; 10 and 8 on December 12 – 13, and 5 on December 14
– 17.