‰  NOW 18 WPM transition file follows‰

Average daily sunspot number this week declined just 1.7 to 26.6,
even though there were two days in the reporting week with no
sunspots, July 18 and 19.  The blank sun condition continued at
least one more day on Thursday, July 20 which lands it on the first
day of the next reporting week, July 20 to 26.  Average daily solar
flux was 85.9, down 1.1 from the previous week.  Average planetary A
index rose 3.9 points to 13, average mid latitude A index rose from
9.6 to 10.9.  A coronal mass ejection, CME, on July 16 struck at
0545 UTC driving the planetary A index to 41, and 27 the following
day.  Predicted solar flux is 70 on July 21 to 27, 75 on July 28, 90
on July 29 through August 11, 85 on August 12 and 13, 80 on August
14, 74 on August 15 to 19, 75 on August 20 to 24, and 90 on August
25 to September 3.  Predicted planetary A index is 8, 12 and 8 on
July 21 to 23, 5 on July 24 through August 4, then 25, 10 and 8 on
August 5 to 7, 5 on August 8 to 14, 8 on August 15 and 16, then 15
and 12 on August 17 and 18, 5 on August 19 to 31, and 25, 10 and 8
on September 1 to 3.  F. K. Janda, OK1HH of the Czech Propagation
Interest Group sent us this geomagnetic activity forecast for the
period July 21 to August 8, 2017 Geomagnetic field will be, Quiet on
July 25 and 26, August 1 and 2 Mostly quiet on July 24, 27, 30 and
31, August 4, 8 Quiet to unsettled July 23, August 3 Quiet to active
on July 21 and 22, 28 and 29, August 7 Active to disturbed on August
5 and 6 Amplifications of the solar wind from coronal holes are
expected on July 21, 23 and 24, 28 and 29, August 6 to 8 David Moore
sent a link to an excellent NY Times science article titled
Unlocking Mysteries in the Suns 11 Year Cycle, //nyti.ms/2tdddgv
Another interesting article, //cosmosmagazine.com/space/studying
dash the dash solar dash cycle And the latest from Tamitha Skov,
//bit.ly/2vqusbs More good information and tutorials on propagation
are at //k9la.us/.  Monthly propagation charts between four USA
regions and twelve overseas locations are at //arrl.org/propagation.
Instructions for starting or ending email distribution of ARRL
bulletins are at //arrl.org/bulletins.  Sunspot numbers were 55, 58,
34, 26, 13, 0, and 0, with a mean of 26.6. 10.7 cm flux was 92.3,
93.9, 91.6, 86.5, 85.6, 78.2, and 73.1, with a mean of 85.9.
Estimated planetary A indices were 4, 4, 4, 41, 27, 7, and 4, with a
mean of 13.  Estimated mid latitude A indices were 5, 3, 4, 29, 23,
7, and 5, with a mean of 10.9.

‰  END OF 18 WPM transition file ƒ