hamradioweb.org http://www.hamradioweb.org/forums/ area di discussione riservata alla propagazione ionosferica delle onde radio. Vi trovate i grafici aggiornati di alcuni indici di attività solare nonchè le mappe di propagazione in HF per il mese corrente. en Thu, 23 May 2013 20:03:28 GMT vBulletin 60 http://www.hamradioweb.org/forums/images/misc/rss.jpg hamradioweb.org http://www.hamradioweb.org/forums/ indici attività solare http://www.hamradioweb.org/forums/showthread.php?t=1085&goto=newpost Wed, 15 May 2013 16:35:37 GMT In ogni modo adesso che la 1748 è più visibile, non pare così grande come sembrava qlc giorno fa, speriamo si sia "sfogata" con questi 3 flare.. ]]> Propagazione ionosferica IZ5CML http://www.hamradioweb.org/forums/showthread.php?t=1085 <![CDATA[Condizioni propagative per l'ARI International DX Contest - 2013]]> http://www.hamradioweb.org/forums/showthread.php?t=18651&goto=newpost Tue, 07 May 2013 11:52:14 GMT Tutto il seguito di queto thread, poiché riguardava il contest in sè più che le condizioni di propagazione, è stato spostato nella discussione "ARI International DX Contest - 2013" nella sezione Contesting. ]]> Propagazione ionosferica HRW-staff http://www.hamradioweb.org/forums/showthread.php?t=18651 Tabelle di propagazione mese corrente http://www.hamradioweb.org/forums/showthread.php?t=8472&goto=newpost Thu, 02 May 2013 20:58:24 GMT mappe aggiornate a maggio 2013 mappe aggiornate a maggio 2013 ]]> Propagazione ionosferica IK7JWY http://www.hamradioweb.org/forums/showthread.php?t=8472 Solar cycle 24 - summary of last quarter February to April 2013 http://www.hamradioweb.org/forums/showthread.php?t=18639&goto=newpost Thu, 02 May 2013 14:47:54 GMT [click on the picture to full view]

Let's see the situation with the solar cycle # 24.
All data needed for the following charts comes from the Space Weather Canada, SIDC and WSO.
Unless otherwise indicated, I refer the "adjusted" values of the solar flux, corrected (by Space Weather Canada) to refer to the average Earth-Sun distance (1 Astronomical Unit).

Attachment 10390
This is the graph of the solar flux on 2800MHz from the month of the previous minimum smoothed solar flux (October 2008) to the present. The blue curve is the monthly mean value of solar flux, while the red one is the smoothed value.
After a declining trend from april to september 2012, the smoothed solar flux has increased slightly in October 2012, thanks to the monthly mean value of April 2013 (abt 124 sfu).


Attachment 10389
This is the comparison chart, in terms of Smoothed Sunspot Number, between the solar cycle #24 and all the previous ones. This chart starts from the month of the previous minimun smoothed sunspot number (december 2008).
The curve of the solar cycle #24 is the red one.
The smoothed sunspot number is stable around 58 from June 2012, after a declining trend from march to july 2012.

As known, in correspondence of the maximum of solar cycle there is an inversion of the magnetic poles of the Sun. Through the measures of the Wilcox Solar Observatory, we can see how this inversion evolves.

Attachment 10391
As you can see, the average curve (yellow) has almost reached zero (exactly -3 in date 07-01-2013). Then the value has once again moved away from zero (-5 in January and February 2013 and -4 in March and April).
Also, the curves of the monthly mean values ​​for the northern hemisphere and the southern one have in recent months a trend a little uneven.
Let's see in the next months.

The next update in early August 2013.
Attached Thumbnails
Click image for larger version Name: risalita cicli 1749_2012_maggio2013.jpg Views: N/A Size: 403.6 KB ID: 10389   Click image for larger version Name: ADJ 1-5-2013.jpg Views: N/A Size: 161.5 KB ID: 10390   Click image for larger version Name: polar field aprile 2013.jpg Views: N/A Size: 380.3 KB ID: 10391  
]]> Propagazione ionosferica IK7JWY http://www.hamradioweb.org/forums/showthread.php?t=18639