Post by Renae/k9do on Sept 3, 2021 22:00:17 GMT
ARLP036 Propagation de K7RA
ARRL Web site
Fri 9/3/2021 4:58 PM
SB PROP @ ARL $ARLP036
ARLP036 Propagation de K7RA
ZCZC AP36
QST de W1AW
Propagation Forecast Bulletin 36 ARLP036
From Tad Cook, K7RA
Seattle, WA September 3, 2021
To all radio amateurs
SB PROP ARL ARLP036
ARLP036 Propagation de K7RA
Solar activity is on the upswing this week. Average daily sunspot
numbers increased from 21.7 to 50.6, with a high of 77 last
Saturday, August 28. Average daily solar flux rose from 78.5 to 88.
Average daily planetary A index increased from 4.7 to 9.6, and
average daily middle latitude A index went from 5.7 to 10.7.
Geomagnetic activity peaked on August 27 and 28 due to a coronal
mass ejection.
New sunspot regions appeared on August 26 and 27, and on September 2
Spaceweather.com reported "New Sunspot, Rapidly Growing" to announce
the emergence of AR2863.
Predicted solar flux looks promising, particularly after
mid-September, at 85 and 82 on September 3 and 4, 80 on September 5
and 6, 78 on September 7, 75 on September 8 to 10, 80 on September
11 to 14, 85 on September 15, 90 on September 16 to 30, 85 on
October 1, and 80 on October 2 to 10. Flux values rise to 90 again
after October 12 in this forecast from September 2.
Predicted planetary A index is 8, 5, 10 and 8 on September 3 to 6, 5
on September 7 to 10, then 10 and 8 on September 11 and 12, 5 on
September 13 to 20, 8 on September 21, 5 on September 22 to 25, then
a big jump to 25, 8, 18, 8, and 12 on September 26 to 30, and back
to 5 on October 1 to 7, then 10 and 8 on October 8 and 9.
Sunspot numbers for August 26 through September 1, 2021 were 47, 73,
77, 44, 41, 37, and 35, with a mean of 50.6. 10.7 cm flux was 88.6,
89.5, 89.9, 88.7, 90.6, 84.4, and 84.2, with a mean of 88.
Estimated planetary A indices were 6, 20, 14, 8, 7, 7, and 5, with a
mean of 9.6. Middle latitude A index was 6, 19, 17, 9, 9, 9, and 6,
with a mean of 10.7.
ARRL Web site
Fri 9/3/2021 4:58 PM
SB PROP @ ARL $ARLP036
ARLP036 Propagation de K7RA
ZCZC AP36
QST de W1AW
Propagation Forecast Bulletin 36 ARLP036
From Tad Cook, K7RA
Seattle, WA September 3, 2021
To all radio amateurs
SB PROP ARL ARLP036
ARLP036 Propagation de K7RA
Solar activity is on the upswing this week. Average daily sunspot
numbers increased from 21.7 to 50.6, with a high of 77 last
Saturday, August 28. Average daily solar flux rose from 78.5 to 88.
Average daily planetary A index increased from 4.7 to 9.6, and
average daily middle latitude A index went from 5.7 to 10.7.
Geomagnetic activity peaked on August 27 and 28 due to a coronal
mass ejection.
New sunspot regions appeared on August 26 and 27, and on September 2
Spaceweather.com reported "New Sunspot, Rapidly Growing" to announce
the emergence of AR2863.
Predicted solar flux looks promising, particularly after
mid-September, at 85 and 82 on September 3 and 4, 80 on September 5
and 6, 78 on September 7, 75 on September 8 to 10, 80 on September
11 to 14, 85 on September 15, 90 on September 16 to 30, 85 on
October 1, and 80 on October 2 to 10. Flux values rise to 90 again
after October 12 in this forecast from September 2.
Predicted planetary A index is 8, 5, 10 and 8 on September 3 to 6, 5
on September 7 to 10, then 10 and 8 on September 11 and 12, 5 on
September 13 to 20, 8 on September 21, 5 on September 22 to 25, then
a big jump to 25, 8, 18, 8, and 12 on September 26 to 30, and back
to 5 on October 1 to 7, then 10 and 8 on October 8 and 9.
Sunspot numbers for August 26 through September 1, 2021 were 47, 73,
77, 44, 41, 37, and 35, with a mean of 50.6. 10.7 cm flux was 88.6,
89.5, 89.9, 88.7, 90.6, 84.4, and 84.2, with a mean of 88.
Estimated planetary A indices were 6, 20, 14, 8, 7, 7, and 5, with a
mean of 9.6. Middle latitude A index was 6, 19, 17, 9, 9, 9, and 6,
with a mean of 10.7.