Sunspot numbers and solar flux made a strong comeback over the past week, March
30 to April 5.
Average daily solar flux was 96.5 (compared to 77.9 the
previous seven days, and 71.2 over the week before that, March
16-22).
Average daily sunspot number progressed from 3.4 to 29.7 to 65.9
over the same three weeks.
The latest daily forecast for Planetary A
index and solar flux from NOAA and USAF (updated daily at
ftp://ftp.swpc.noaa.gov/pub/forecasts/45DF/ ) shows solar flux at 76 on April 7,
70 April 8-13, 75 on April 14, 78 on April 15-16, 85 on April 17-19, 72 on April
20-23, 88 on April 24-27, 85 on April 28-29, 105 on April 30, then 100, 97, 92,
85, and 80 on May 1-5, 75 on May 6-7, 78 on May 8-9, 75 on May 10-11, 78 on May
12-13, 85 on May 14-16, and 92 on May 17-20.
The same forecast, but for
planetary A index, shows 8 on April 7-8, then 5, 8, and 10 April 9-11, 8 on
April 12-13, 5 on April 14-16, then 20, 18 and 10 on April 17-19, 5 on April
20-22, then 55, 28, 20, 22, and 28 on April 23-27, then 15, 10, 8, 7 and 6 on
April 28 through May 2, 5 on May 3-13, 20, 18, and 10 on May 14-16, 5 from May
17-19, then 55 and 28 on May 20-21.
At this link –http://bit.ly/2o5Ts6g –
you’ll find a nice image from a few days back of sunspot AR2644 and 2645. Also
check http://bit.ly/2nNpeCC .
F.K. Janda, OK1HH sent us this geomagnetic
activity forecast for the period April 7-May 2, 2017.
“Geomagnetic field
will be:
Quiet on April 9-10, 14-16, 20, 30
Mostly quiet on April 8, 11,
19, 21, 29, May 2
Quiet to unsettled April 12-13, May 1
Quiet to active on
April 7, 22, 24-28
Active to disturbed on April 17-18,
23
Amplifications of the solar wind from coronal holes are expected on
April (7-8,) 11-13. (15,) 16-19, 24-27
