[South Florida DX Association] ARLP007 Propagation de K7RA

[Bill Marx]

 SB PROP ARL ARLP007
> ARLP007 Propagation de K7RA
> 
> Average daily sunspot numbers this week rose over 7 points to 9, but
> this doesn't mean much. Check out
> http://www.sec.noaa.gov/ftpdir/indices/DSD.txt to see how many days
> with a blank sun were noted over the last thirty days. Plan on
> seeing even longer stretches of 0 sunspots over the next year. A
> couple of years from now we should see a new cycle 24 rising faster
> than this old one declined.
> 
> Check out a great website showing sketches of sunspots drawn in 1612
> by Galileo Galilei,
> http://galileo.rice.edu/sci/observations/sunspot_drawings.html. The
> coolest part is the arrangement of the sketches into a sort of
> flip-book animation, which you can view with any media player such
> as Windows Media Player or Apple QuickTime. This gives us a
> reproduction of what the sun was doing over the 35 days that Galileo
> made these sketches. What a remarkable thing.
> 
> The ARRL International DX CW Contest is on for this weekend.
> Sunspot 854 is pointing straight at us, but it is tiny. For an idea
> of the relative area covered by this spot, check the web site
> mentioned in the first paragraph above, and look at the Sunspot Area
> shown in the fourth column, relative to sunspot area in January.
> 
> Look for sunspot numbers and solar flux to rise only slightly, if at
> all, and for quiet geomagnetic conditions. Sunday, February 19
> should give us only slightly unsettled geomagnetic conditions.
> Based on the previous solar rotation, Wednesday, February 22 looks
> like it may show some fairly active geomagnetic conditions.
> 
> Geophysical Institute Prague predicts slightly different conditions,
> with February 19 unsettled to active, and February 21 and 22 just
> unsettled. They think today and tomorrow, February 17 and 18, will
> be quiet. They predict quiet to unsettled conditions for February 20
> and 23.
> 
> 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 and an explanation
> of the numbers used in this bulletin see the ARRL Technical
> Information Service propagation page at,
> http://www.arrl.org/tis/info/propagation.html. An archive of past
> propagation bulletins is found at, http://www.arrl.org/w1aw/prop/.
> 
> Sunspot numbers for February 9 through 15 were 24, 13, 11, 0, 0, 0
> and 15 with a mean of 9. 10.7 cm flux was 74.8, 75.2, 76, 76, 76.3,
> 77.3, and 78.5, with a mean of 76.3. Estimated planetary A indices
> were 2, 2, 6, 3, 2, 1 and 12 with a mean of 4. Estimated
> mid-latitude A indices were 2, 2, 4, 2, 2, 1 and 7, with a mean of
> 2.9.
> NNNN
> /EX
> 
>