‰  NOW 18 WPM transition file follows‰

Average daily sunspot numbers this week, May 4 to 10, were 17.1,
down from 25.1 last week. Average daily solar flux declined from
76.9 to 71.5.  There were three consecutive days with 0 sunspots
this week, May 9 to 11. Spaceweather.com noted that Thursday was the
33rd day with 0 sunspots in 2017, and through all of 2016 there were
32 days with no sunspots.  Being early May, this indicates an
acceleration of the decline of the current solar cycle.  Predicted
solar flux is 71 on May 12 and 13, 70 on May 14 to 17, 80 on May 18
to 23, 77 on May 24 to 27, 75 on May 28 through June 1, 73 on June
2, 72 on June 3 and 4, 70 on June 5 to 8, 72 on June 9 and 10, 75 on
June 11, and 80 on June 12 to 19.  Predicted planetary A index is 6
on May 12, 5 on May 13 to 16, 15 on May 17 and 18, then 8, 15, 30,
20, 10 and 8 on May 19 to 24, 5 on May 25 through June 3, 8 on June
4, 5 on June 5 to 7, then 8, 5, 5 and 8 on June 8 to 11, then 15,
30, 15 and 8 on June 12 to 15.  Both above Ap and 10.7 cm SF
forecasts are from Wednesday May 10. As of 1430 UTC Friday the
Thursday May 11 forecast, normally out after 2100 UTC daily, was
still unavailable.  You can check
//ftp.swpc.noaa.gov/pub/forecasts/45DF/ for daily updates of
predicted Ap, or the planetary A index, and solar flux predictions.
OK1HH gives us his geomagnetic activity forecast for May 12 to June
7, 2017.  Geomagnetic field will be, Amplifications of the solar
wind from coronal holes are expected May 16 to 19, and maybe about
May 29 and 30, and June 3, 6, 7 and 8.  From, F.K. Janda, OK1HH
Czech Propagation Interested Group OK1HH compiling weekly forecasts
since 1978.  For more information concerning radio propagation, see
the ARRL Technical Information Service web page.  An detailed
explanation of the numbers used in this bulletin is also available
on this site.  An archive of past propagation bulletins is also
available.  Monthly propagation charts between four USA regions and
twelve overseas locations can be found on the W1AW web site.  Find
more good information and tutorials on propagation on the k9la web
site.  Sunspot numbers were 29, 31, 26, 23, 11, 0, and 0, with a
mean of 17.1. 10.7 cm flux was 74.2, 73.5, 72.8, 71.7, 70.5, 68.9,
and 68.6, with a mean of 71.5. Estimated planetary A indices were 7,
6, 5, 8, 6, 6, and 6, with a mean of 6.3. Estimated mid latitude A
indices were 6, 5, 5, 7, 7, 5, and 6, with a mean of 5.9.


‰  END OF 18 WPM transition file ƒ