‰  NOW 18 WPM transition file follows‰

Because there were no sunspots in six of the seven days, July 20 to
26, last week, average daily sunspot number dropped from 26.6 to
1.7.  Average daily solar flux declined from 85.9 to 69.7.  Average
daily planetary A index declined from 13 to 11.9, while the mid
latitude A index went the opposite direction, from 10.9 to 12.9.
The latest predicted solar flux, as of July 27, shows 68 on July 28
and 29, 72 and 76 on July 30 and 31, 80 on August 1 to 3, 82 on
August 4 to 11, 80 and 75 on August 12 and 13, 70 on August 14 to
25, 80 on August 26, 82 on August 27 through September 1, 80 on
September 2 to 4, 82 on September 5 to 7, and 80, 75 and 70 on
September 8 to 10.  Predicted planetary A index is 7, 5, 6, 12, 10
and 8 on July 29 through August 2, 5 on August 3 to 5, 25 and 10 on
August 6 and 7, 5 on August 8 to 15, 15 on August 17 and 18, then 12
and 8 on August 19 and 20, 5 on August 21 to 31, then 25, 10 and 8
on September 1 to 3, and 5 on September 4 to 10.  F. K. Janda, OK1HH
of the Czech Propagation Interest Group sent this geomagnetic
activity forecast for the period July 28 to August 22, 2017.
Geomagnetic field will be, Quiet on August 4, 9 Mostly quiet on July
30, August 2, 8, 10, 14 and 15 Quiet to unsettled July 28 and 29,
August 1, 3, 16 Quiet to active on July 31, August 5, 7, 11, 13, 17
to 22 Active to disturbed on August 6, 12 Amplifications of the
solar wind from coronal holes are expected on July 13 to 17, 20 and
21, 23 and 24, 28 and 29, August 6 to 8.  Dont miss the Solar
Eclipse QSO Party on Monday, August 21 from 1400 to 2100 UTC.  This
is a wide ranging propagation experiment intended to observe what
happens when the moon blocks ionizing solar radiation from the
ionosphere.  The event is sponsored by ARRL and HamSCI, and the
details are in the August 2017 QST.  Martin McCormick, WB5AGZ of
Stillwater, Oklahoma reported on July 23, This has been one of the
less spectacular sporadic E seasons so far with several openings but
very few that are the type one will remember much after they
occurred.  After learning that WWV had installed a turnstile antenna
on its 25 MHZ transmitter, I began parking a receiver on that
frequency to see if I could hear it in North Central OK.  The first
couple of weeks were nothing but then WWV began coming in around
0000 UTC starting July 20.  Whatever is ionizing the E layer to
create this propagation is sticking around for a few days because
once it started fading in, it has made numerous appearances this
last week.  It has mostly been in the mid to late evenings Central
time but on Sunday July 23, it has been in with a fair signal since
around 1200 UTC and is still somewhat audible at 1700 UTC as I
write.  It is good that WWV is transmitting on 25 MHZ as there are
almost no steady identifiable signals in high HF and low VHF anymore
to indicate when the bands are open.  There is an announcement at 17
minutes past the hour stating that the turnstile antennas
configuration will not change until after the eclipse on 21 August.
//adsabs.harvard.edu/abs/2010JGRA..11512318K An archive of past
propagation bulletins is at //arrl.org/w1aw dash bulletins dash
archive dash propagation.  More good information and tutorials on
propagation are at //k9la.us/.  Instructions for starting or ending
email distribution of ARRL bulletins are at //arrl.org/bulletins.
Sunspot numbers were 0, 0, 0, 0, 0, 12, and 0, with a mean of 1.7.
10.7 cm flux was 70.2, 69.4, 69.5, 70.6, 70.1, 69.8, and 68.6, with
a mean of 69.7.  Estimated planetary A indices were 7, 14, 16, 14,
12, 9, and 11, with a mean of 11.9.  Estimated mid latitude A
indices were 6, 13, 18, 16, 13, 9, and 15, with a mean of 12.9.

‰  END OF 18 WPM transition file ƒ