In the last reporting week (February 9-15) average daily sunspot numbers
declined from 21.3 to 17.6, and average daily solar flux rose from 73.5 to 75.1.
Average planetary A index dropped from 12.9 to 4.7, and mid-latitude A index
from 9.9 to 2.9.
Predicted solar flux is 74 on February 17-19, then 77,
80, 83, 85 and 80 on February 20-24, 78 on February 25-26, 76 on February 27-28,
75 on March 1-2, 73 on March 3-4, 72 on March 5-7, 73 and 74 on March 8-9, 75 on
March 10-11, 78 on March 12-15, 80 on March 16-18, then 82, 85 and 82 on March
19-21, 80 on March 22-23, 78 on March 24-25, 76 on March 26-27, 75 on March
28-29 and 73 on March 30-31.
Predicted planetary A index is 12,
10 and 8 on February 17-19, 5 on February 20-21, 8 and 14 on February 22-23, 10
on February 24-25, then 5, 25, 30, 25 and 20 on February 26 through March 2, 15
on March 3-5, 8 on March 6, 5 on March 7-12, then 8, 12 and 10 on March 13-15, 8
on March 16-17, 5 on March 18-20, then 10 and 15 on March 21-22, then 10 on
March 23-24 and 5, 25, 30, 25 and 20 on March 25-29, and 15 on March 30 through
April 1.
“Geomagnetic activity
forecast for the period February 17-March 15, 2017 from F.K. Janda,
OK1HH:
Geomagnetic field will be:
Quiet on February 21, 24, 26, March 8,
11-12
Mostly quiet on February 19-20, March 9-10
Quiet to unsettled
February 17, March 4, 7, 13-15
Quiet to active on February 18, 25, March 3,
6
Active to disturbed on February (22-23,) 27-28, March 1-2, 5
Increases in solar wind from
coronal holes are expected on February 16-17, (18-22, 26-27,) March 2-5
Remark:
- Parenthesis means lower
probability of activity enhancement.”
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