[SFDXA] ARLP034 Propagation de K7RA

[Bmarx@bellsouth.net]

> SB PROP @ ARL $ARLP034
> ARLP034 Propagation de K7RA
> 
> ZCZC AP34
> QST de W1AW  
> Propagation Forecast Bulletin 34  ARLP034
> From Tad Cook, K7RA
> Seattle, WA  August 23, 2019
> To all radio amateurs 
> 
> SB PROP ARL ARLP034
> ARLP034 Propagation de K7RA
> 
> Spotless days continue this week, with consecutive days without
> sunspots now at 16 days, according to spaceweather.com as of August
> 22.
> 
> Average daily solar flux for all practical purposes was unchanged,
> from 67.4 last week to 67.5 this week.  Average daily planetary A
> index went slightly lower from 6.3 to 4.4.
> 
> Predicted solar flux looks the same as it has been for months now,
> at 67 on August 23 to September 11, 68 on September 12 to 21 and 67
> again on September 22 through October 6.
> 
> The forecast for planetary A index stands at 5 on August 23 to 25,
> then 12, 12 and 8 on August 26 to 28, 5 on August 29 to 31, then
> with a recurring coronal hole, 38 and 14 on September 1 and 2, 5 on
> September 3 to 5, 8 on September 6 and 7, then 5 on September 8 to
> 15, 7 on September 16 and 17, 6 on September 18, 5 on September 19
> to 21, 8 on September 22 to 24, 5 on September 25 to 27, then with
> the return of that coronal hole 38 and 14 on September 28 and 29, 5
> on September 30 through October 2, 8 on October 3 and 4 and 5 on
> October 5 and 6.
> 
> Geomagnetic activity forecast for the period August 23 to September
> 18, 2019 from F. K. Janda, OK1HH who has issued weekly forecasts
> since January, 1978.
> 
> "Geomagnetic field will be:
> 
> Quiet on: September 4 and 5, 9 to 15 
> Quiet to unsettled on: August 29 to 31, September 3, 6 to 8 
> Quiet to active on: August (23 to 25,) September 16 to 18 
> Unsettled to active on: August (26 to 28), September 2 
> Active to disturbed: September 1 
> 
> Solar wind will intensify on: August 27 to 29, (30 and 31,)
> September 1 and 2, (4 to 7)
> 
> Parenthesis means lower probability of activity enhancement."
> 
> There was an error in last week's bulletin, in which we
> misidentified a call sign from Reunion Island when it was really St.
> Pierre et Miquelon.  Because of the proximity to Nova Scotia, I
> always thought it part of Canada, but it is really a French
> possession.
> 
> Ken, N4SO reports working XP3A (Greenland) with FT8 on 18.1 MHz, a
> new one for him.
> 
> Interesting course from WX6SWW about indices:
> 
> https://www.youtube.com/watch?v=zVgZQqUYemc
> 
> And her latest forecast:
> 
> https://youtu.be/GlpdWxXUnAk
> 
> Curious about spotless days?
> 
> http://www.sidc.be/silso/spotless
> 
> Note that 1954 had more spotless days than last year, and it was
> just prior to the biggest solar cycle (cycle 19) in recorded
> history.
> 
> 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 at
> http://arrl.org/propagation-of-rf-signals.  For an explanation of
> numbers used in this bulletin, see
> http://arrl.org/the-sun-the-earth-the-ionosphere.
> 
> An archive of past propagation bulletins is at
> http://arrl.org/w1aw-bulletins-archive-propagation.  More good
> information and tutorials on propagation are at http://k9la.us/.
> 
> Monthly propagation charts between four USA regions and twelve
> overseas locations are at http://arrl.org/propagation.
> 
> Instructions for starting or ending email distribution of ARRL
> bulletins are at http://arrl.org/bulletins.
> 
> Sunspot numbers for August 15 through 21, 2019 were 0, 0, 0, 0, 0,
> 0, and 0, with a mean of 0. 10.7 cm flux was 67.6, 67.5, 68, 67.5,
> 67.7, 67.3, and 66.8, with a mean of 67.5.  Estimated planetary A
> indices were 4, 5, 4, 6, 4, 4, and 4, with a mean of 4.4.  Middle
> latitude A index was 4, 6, 6, 7, 4, 7, and 5, with a mean of 5.6.
> NNNN
> /EX