‰  NOW 18 WPM transition file follows‰

Solar activity increased over the past week, with average daily
sunspot numbers up from 5.4 to 20 and average daily solar flux
rallying from 69.9 to 73.4. The previous week saw four days with no
sunspots, and the recent week had sunspots on every day. New sunspot
groups emerged on April 19 and 21.  Predicted solar flux is 69 on
April 27 to 29, 68 on April 30 through May 3, 70 on May 4 to 16, 75
on May 17 to 29, 70 on May 30 through June 10.  Predicted planetary
A index is 12 on April 27, 5 on April 28 through May 5, then 10, 15,
12, 10 and 8 on May 6 to 10, 5 on May 11 to 16, then 42, 12 and 8 on
May 17 to 19, 5 on May 20 to 22, then 8 and 12 on May 23 and 24, 5
on May 25 through June 1, then 10, 15, 12, 10 and 8 on June 2 to 6,
then 5 on June 7 to 10.  Geomagnetic activity forecast for the
period April 27 to May 22, 2018 from F.K. Janda, OK1HH of the Czech
Propagation Interest Group.  Dr. Tamitha Skov will probably release
a new space weather video after this bulletin is sent to ARRL HQ for
distribution. This is probably a good place to check for her latest
report online, //www.youtube.com/user/SpWxfx If you would like to
make a comment or have a tip for our readers, email the author at,
k7ra at arrl.net .  For more information concerning radio
propagation, see the ARRL Technical Information Service web page.  A
detailed explanation of 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 ARRL/Propagation
web page.  Find better information and tutorials on propagation on
the K9LA web site.  The multiple websites mentioned in this bulletin
can be found in teleprinter, packet, and Internet versions of 2018
Propagation Forecast Bulletin ARLP017.  Sunspot numbers were 14, 14,
34, 20, 22, 19, and 17, with a mean of 20. 10.7 cm flux was 70.8,
73, 76.8, 75.7, 73.9, 72.9, and 70.8, with a mean of 73.4. Estimated
planetary A indices were 3, 47, 12, 5, 6, 5, and 5, with a mean of
11.9.  Estimated mid latitude A indices were 2, 29, 10, 5, 6, 4, and
4, with a mean of 8.6.

‰  END OF 18 WPM transition file ƒ