february
2012
   
11 February
  Propagation de K7RA
Solar activity was down again this week. In fact this is the third consecutive week in which sunspot numbers were lower than the prior week
     
7 February
  G0KYA UK Propagation charts for February 2012
Steve G0KYA has published his UK propagation charts for February 2012
     
5 February
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that the Solar activity is at low levels
     
4 February
  Propagation de K7RA
Here are some yearly averages this bulletin neglected at the beginning of the year. These are the average daily sunspot numbers for whole calendar years, from 1994-2011: 48.1, 28.7, 13.2, 30.7, 88.7, 136.3, 173, 170.3, 176.7, 109.2, 68.6, 48.9, 26.1, 12.8, 4.7, 5.1, 25.5, and 29.9

January
2012
   
29 January
  Propagation Report from Hannes Coetzee, ZS6BZP
Solar activity on the sun, as far as solar flares go, is declining after the major M-class flare of Monday. Region 1 402 is currently the largest visible sunspot and produces C-class flares from time-to-time
     
28 January
  Propagation de K7RA
This was another week in which average daily sunspot numbers declined, but average daily solar flux increased
     
22 January
  Propagation Report from Hannes Coetzee, ZS6BZP
Solar activity is on the increase with some geomagnetic effects expected
     
21 January
  Propagation de K7RA
New sunspot groups appeared on every day over the past reporting  week (January 12-18), until Thursday, January 19 which had no new spots
     
15 January
  Propagation Report from Hannes Coetzee, ZS6BZP
Sunspot 1 393 has a "beta-gamma" magnetic field that harbours energy for M-class solar flares
     
14 January
  Propagation de K7RA
Average daily sunspot numbers were up this week by a tiny bit, from  88.1 to 90.6, and average daily solar flux was down slightly, from 136.2 to 134.9
     
08 January
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that the solar activity is expected to be at low levels with a slight chance for isolated M-class activity
     
07 January
  Propagation de K7RA
Reports of good conditions continue, although sunspot activity declined a bit
     
04 January
 

G0KYA UK Propagation charts for January 2012
Steve G0KYA has published his UK propagation charts for January 2012

     
01 January
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that the solar activity is expected to be at low to moderate levels
     

December
2011
   
31 December
  Propagation de K7RA
This is the last Propagation Forecast Bulletin of 2011
     
25 December
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that the solar activity is at low levels with a slight chance for a M-class event
     
24 December
  Propagation de K7RA
Average daily sunspot numbers this week were about the same as last, and average daily solar flux declined a little over eight points to 128.9
     
18 December
  Propagation Report from Hannes Coetzee, ZS6BZP
Solar activity is declining with no threats of strong flares
     
17 December
  Propagation de K7RA
Solar activity dropped this week, with average daily sunspot numbers  declining over 39 points to 94.7
     
11 December
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that the solar activity is at predominately low levels declining further with only minor C-class flares detected during the week
     
10 December
  Propagation de K7RA
What happened to that new "grand minima?" Cycle 24 just keeps rolling along, and for the first seven days in December, there were eight new sunspot groups. December 5 had the largest sunspot coverage over the past week, with a daily sunspot number of 185
     
04 December
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that the solar activity is declining further with only a few C-class flares produced during the week
     
03 December
  Propagation de K7RA
November conveniently ended on the last day of this reporting period, so now let's examine recent averages

November
2011
   
29 November
  Propagation de K7RA
This bulletin is issued to fill the gap between the early bulletin last week, and the regularly scheduled bulletin this Friday
     
27 November
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that the solar activity is declining with only a few C-class flares produced during the week
     
24 November
  Propagation de K7RA
Due to the Thanksgiving holiday, the bulletin is coming out early this week. There is an overlap of one day on the data reported at the end of the bulletin
     
20 November
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that many sunspots are producing C-class flares and that sunspot 1 346 poses a slight threat for Earth directed M-class flares
     
19 November
  Propagation de K7RA
This week geomagnetic indices quieted a bit, and so did solar activity in general. Sunspot numbers reached a high of 220 on November 9, and this week declined, rose to 176 then declined again
     
13 November
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that sunspot 1 339 is in a state of slow decay but can still produce some M-class flares
     
06 November
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that the largest sunspot in years is rotating over the sun's north eastern limb
     
05 November
  Propagation de K7RA
First, a few solar cycle updates. As you might suspect, the average daily sunspot numbers for October shot way up, from 55.5 in June, to 67.2 in July, 66 in August, 106.4 in September, and 123.6 in October
     
02 November
  G0KYA UK Propagation charts for November 2011
Steve G0KYA has published his UK propagation charts for November 2011

October
2011
   
23 Oct
  Propagation Report from Hannes Coetzee, ZS6BZP
22 Oct
  Propagation de K7RA
16 Oct
  Propagation Report from Hannes Coetzee, ZS6BZP
15 Oct
  Propagation de K7RA
09 Oct
  Propagation Report from Hannes Coetzee, ZS6BZP
08 Oct
  Propagation de K7RA
05 Oct
  UK Propagation charts for October 2011
02 Oct
  Propagation Report from Hannes Coetzee, ZS6BZP
01 Oct
  Propagation de K7RA

September
2011
   
28 Sept
  Solar CME and flares kill upper HF bands
25 Sept
  Propagation Report from Hannes Coetzee, ZS6BZP
24 Sept
  Propagation de K7RA
18 Sept
  Propagation Report from Hannes Coetzee, ZS6BZP
17 Sept
  Propagation de K7RA
14 Sept
  G0KYA's HF Propagation Podcast for September now available
11 Sept
  Propagation Report from Hannes Coetzee, ZS6BZP
10 Sept
  Propagation de K7RA
04 Sept
  UK Propagation charts for September 2011
04 Sept
  Propagation Report from Hannes Coetzee, ZS6BZP
03 Sept
  Propagation de K7RA

August
2011
   
27 August
  Propagation de K7RA
21 August
  Propagation Report from Hannes Coetzee, ZS6BZP
20 August
  Propagation de K7RA
15 August
  Propagation Report from Hannes Coetzee, ZS6BZP
13 August
  Propagation de K7RA
12 August
  G0KYA's HF Propagation Podcast for August now available
07 August
  Propagation Report from Hannes Coetzee, ZS6BZP
06 August
  Propagation de K7RA
02 August
  G0KYA - UK Propagation charts for August 2011

July
2011
   
31 July
  Propagation Report from Hannes Coetzee, ZS6BZP
30 July
  Propagation de K7RA
24 July
  Propagation Report from Hannes Coetzee, ZS6BZP
23 July
  Propagation de K7RA
17 July
  Propagation Report from Hannes Coetzee, ZS6BZP
16 July
  Propagation de K7RA
10 July
  Propagation Report from Hannes Coetzee, ZS6BZP
09 July
  Propagation de K7RA
08 July
  G0KYA - UK Propagation charts for July 2011
03 July
  Propagation Report from Hannes Coetzee, ZS6BZP
02 July
  Propagation de K7RA

June
2011
   
26 June
  Propagation Report from Hannes Coetzee, ZS6BZP
25 June
  Propagation de K7RA
19 June
  Propagation Report from Hannes Coetzee, ZS6BZP
18 June
  Propagation de K7RA
12 June
  Propagation Report from Hannes Coetzee, ZS6BZP
11 June
  Propagation de K7RA
05 June
  G0KYA - UK Propagation charts for June 2011
05 June
  Propagation Report from Hannes Coetzee, ZS6BZP
04 June
  Propagation de K7RA

May
2011
   
29 May
  Propagation Report from Hannes Coetzee, ZS6BZP
New sunspot 1 223 continues to grow in the southern hemisphere. Another new sunspot is forming in the northern hemisphere as well
     
29 May
  Propagation de K7RA
The bulletin this week is coming to you from Felton, California, where your author is attending a camp for blues dancers
     
22 May
  Propagation Report from Hannes Coetzee, ZS6BZP
Sunspot 1 208 turned away from Earth on the 18th, carried over the western edge of the solar disk by the sun's 27-day rotation. En route to the far side, the active region delivered a parting shot
     
21 May
  Propagation de K7RA
A decline in sunspot activity this week showed as a 23 point drop in average daily sunspot numbers, and nearly 9 point decline in average daily solar flux
     
18 May
  G0KYA's HF Propagation Podcast for May and June now available
Steve G0KYA, has now published his HF propagation Report podcast for May/June 2011
     
15 May
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP,  reports that the solar activity is at low levels. There is currently no chance for strong solar flares
     
14 May
  Propagation de K7RA
As reported in the ARRL Letter, on Wednesday May 11, six sunspot groups were visible, but that number shrunk to two on Thursday
     
08 May
  Propagation Report from Hannes Coetzee, ZS6BZP
     
07 May
  Propagation de K7RA
Currently seven sunspot groups are visible. The average daily sunspot number is down more than seven points over the past reporting week (April 28 to May 4) when compared to the previous seven days. Average daily solar flux was off nearly five points compared to the earlier period
     
01 May
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that the solar activity is at moderate levels. New sunspots 1 202 and 1 203 were numbered on Thursday and it looks like 1 202 has already faded away

April
2011
   
30 April
  Propagation de K7RA
Geomagnetic conditions are quiet this week, but may become slightly unsettled over this weekend. Average daily sunspot numbers were down over 18 points to 74.9, while average daily solar flux was off less than four points to 113.4
     
24 April
  Propagation Report from Hannes Coetzee, ZS6BZP
Numerous C-class flares are taking place around sunspots 1193 and 1195 and the new sunspot 1196
     
23 April
  NZ4O Condensed HF Radiowave Propagation Forecast #2011-16
The NZ4O Condensed HF Radiowave Propagation Forecast #2011-16 has been published at 0000 UTC on Friday April 22, 2011, valid 0000 UTC Saturday April 23, 2011 through 2359 UTC Friday April 28, 2011
     
22 April
  Propagation de K7RA
Average daily sunspot numbers and solar flux for the week were both higher - sunspot numbers up over three points to 93.1 - and solar flux up by eight points to 117.2
     
17 April
  Propagation Report from Hannes Coetzee, ZS6BZP
Numerous C-Class flares are taking place around both sprawling Sunspot 1 190 and new Sunspot 1 193. The solar flux is trending higher thanks to all of the recent sunspot activity
     
16 April
  Propagation de K7RA
The daily sunspot number reached a new high for Solar Cycle 24 on Wednesday, April 13, 2011, when it hit 153. I looked back over this calendar year, and saw that the previous high was 137 on March 8, 2011, 16 points lower than Wednesday
     
15 Apri
  NZ4O Condensed HF Radiowave Propagation Forecast #2011-15
The NZ4O Condensed HF Radiowave Propagation Forecast #2011-15 has been published at 0000 UTC on Friday April 15, 2011, valid 0000 UTC Saturday April 16, 2011 through 2359 UTC Friday April 22, 2011
     
13 April
  G0KYA's HF Propagation Podcast for April now available
Steve G0KYA, has published his HF Propagation Podcast for April 2011
     
10 April
  Propagation Report: Give 10 metres a try this week
With Hannes Coetzee not available this week, Hans, ZS6AKV, reports that the geomagnetic conditions are at quiet levels
     
09 April
  Propagation de K7RA
Our Sun is still quite active, but sunspot numbers are down this week when compared with the week before
     
08 April
  NZ4O Condensed HF Radiowave Propagation Forecast #2011-14
The NZ4O Condensed HF Radiowave Propagation Forecast #2011-14 has been published at 0000 UTC on Friday April 08, 2011, valid 0000 UTC Saturday April 09, 2011 through 2359 UTC Friday April 15, 2011
     
05 April
  G0KYA's UK Propagation charts for April 2011
Steve G0KYA has published his UK propagation prediction charts for April 2011
     
03 April
  Propagation Report from Hannes Coetzee, ZS6BZP
Currently Sunspots 1 176, 1 180 and 1 183 are doing their part to make HF operators happy with some very nice DX openings during the past week. The effective sunspot number is expected to be around 75 for the coming week
     
02 April
  Propagation de K7RA
The activity we could see recently on our Sun's far side -- thanks to the STEREO mission -- has been rotating into view, producing some nice sunspot activity and the resulting improved upper-HF propagation


March
2011
   
27 March
  Propagation Report from Hannes Coetzee, ZS6BZP
Big Sunspot 1 176 which is located in the southern hemisphere produced another low level M-Class flare during the week. There will continue to be a chance for M-Class flares around this region
     
26 March
  Propagation de K7RA
All solar indicators were lower again for the second consecutive week. Average daily sunspot numbers declined over 28 points from the week before to 40.9, and average daily solar flux was off over 18 points to 94.8
     
25 March
  NZ4O Condensed HF Radiowave Propagation Forecast #2011-13
The NZ4O Condensed HF Radiowave Propagation Forecast #2011-13 has been published at 0000 UTC on Friday March 25, 2011, valid 0000 UTC Saturday March 26, 2011 through 2359 UTC Friday April 01, 2011
     
20 March
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP reports that the solar activity is at moderate levels
     
19 March
  NZ4O Condensed HF Radiowave Propagation Forecast #2011-12
The NZ4O Condensed HF Frequency Radiowave Propagation Forecast #2011-12 has been published at 0000 UTC on Friday 03/18/2011, valid 0000 UTC Saturday 03/19/2011 through 2359 UTC Friday 03/25/2011
     
19 March
  Propagation de K7RA
Average daily sunspot numbers this week plummeted 45 points to 69, and average daily solar flux was off over 26 points to 113.1
     
13 March
  Propagation Report from Hannes Coetzee, ZS6BZP
Just as active Sunspots 1164 and 1165 have rotated onto the western limb and out of direct earth view, the second largest Solar Flare of Cycle 24 thus far has taken place around huge Sunspot 1166
     
12 March
  NZ4O Condensed HF Radiowave Propagation Forecast #2011-11
The NZ4O Condensed HF Frequency Radiowave Propagation Forecast #2011-11 has been published at 0000 UTC on Friday 03/11/2011, valid 0000 UTC Saturday 03/12/2011 through 2359 UTC Friday 03/18/2011
     
12 March
  Propagation de K7RA
Sunspot Cycle 24 continued its upward trend this week. The average daily sunspot number was more than double the value of the week before, rising from 50.9 to 114
     
11 March
  G0KYA's HF Propagation Podcast for March now available
     
11 March
  NZ4O Radiowave Propagation Forecast
The NZ4O HF/6M Frequency Radiowave Propagation Forecast #2011-11 has been published at 0000 UTC on Friday 03/11/2011
     
06 March
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that the solar activity is at moderate levels
     
05 March
  Propagation de K7RA
Solar activity is rising again, but average sunspot numbers and solar flux are down compared with last week
     
04 March
  NZ4O Radiowave Propagation Forecast
The NZ4O HF/6M Frequency Radiowave Propagation Forecast #2011-10 has been published at 0000 UTC on Friday 03/04/2011
     
02 March
  G0KYA's UK Propagation charts for March 2011
Steve G0KYA has published his UK propagation prediction charts for March 2011

February
2011
   
27 Feb
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that the solar activity is at moderate levels
     
26 Feb
  Propagation de K7RA
Sunspot groups 1161 and 1162 -- which brought so much activity last week -- have now rotated across our Sun's western horizon, but new sunspot group 1163 has now emerged over the eastern limb
     
26 Feb
  NZ4O Radiowave Propagation Forecast
The NZ4O LF/MF/HF/6M Frequency Radiowave Propagation Forecast #2011-09 has been published at 1500 UTC on Friday 02/25/2011
     
20 Feb
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, can at last report that the solar activity has increased from low to moderate levels, as the biggest solar flare since December 2006 was produced by Sunspot 1 158
     
19 Feb
  NZ4O Radiowave Propagation Forecast
The NZ4O LF/MF/HF/6M Frequency Radiowave Propagation Forecast #2011-08 has been published at 1300 UTC on Friday 02/18/2011
     
19 Feb
  Propagation de K7RA
A dramatic surge in solar activity is underway, with a level of sunspot numbers and solar flux not seen since 2005-2006
     
13 Feb
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that the solar activity is still at low levels
     
12 Feb
  Propagation de K7RA
Seven different sunspot groups were visible over the past week. The high sunspot number in the past seven days was 71 on Tuesday, and the average daily sunspot number more than doubled, rising over 24 points to 44.3
     
11 Feb
  NZ4O Radiowave Propagation Forecast
     
10 Feb
  G0KYA's HF Propagation Podcast for February now available
Steve G0KYA, has published his HF Propagation Podcast for February 2011
     
06 Feb
  Propagation Report from Hannes Coetzee, ZS6BZP
Solar activity is still at low levels. Sunspot 1 150 is decaying with no substitute at the moment visible. The effective sunspot number is expected to be less than 15 for the coming week
     
05 Feb
  Propagation de K7RA
The past week had one zero sunspot day, Thursday, January 27. Activity came right back, but the average daily sunspot number for the week fell over 12 points to 20.1, and average daily solar flux declined 2.7 points to 80.8
     
05 Feb
  NZ4O Radiowave Propagation Forecast
     
02 Feb
  UK Propagation charts for February 2011
Steve, G0KYA has just published his UK propagation charts for February 2011


January
2011
   
30 Jan
  Propagation Report from Hannes Coetzee, ZS6BZP
Hannes Coetzee, ZS6BZP, reports that the solar activity is still at low levels. Sunspots 1 147 and 1 149 are about to disappear out of direct Earth view
     
29 Jan
  Propagation de K7RA
Average daily sunspot numbers rose over the past week (ending January 26) by 11.3 points to 32.6, compared to the previous week
     
28 Jan
  NZ4O Radiowave Propagation Forecast
The NZ4O LF/MF/HF/6M Frequency Radiowave Propagation Forecast #2011-05 has been published at 0000 UTC on Friday 01/28/2011
     
23 Jan
  Propagation Report from Hannes Coetzee, ZS6BZP
Solar activity is still at low levels. Sunspot 1147 persists in the northern hemisphere and a few tiny spots have formed just to the south of it. The effective sunspot number is expected to be less than 20 for the coming week
     
22 Jan
  Propagation de K7RA
Average daily sunspot numbers dropped from 50 on the reporting week ending January 5, to 38 on January 6-12, and now 21.3 on January 13-19. Average weekly solar flux over the same three periods dropped from 89.5 to 83.8 to 80.4 over this past week
     
21 Jan
  NZ4O Radiowave Propagation Forecast
     
16 Jan
  Propagation Report from Hannes Coetzee, ZS6BZP
Solar activity is still at low levels. The face of the sun is nearly spotless as Sunspot 1140 has rotated onto the western limb and Sunspot 1146 is struggling to remain visible. The effective sunspot number is expected to be less than 20 for the coming week
     
15 Jan
  Propagation de K7RA
Average daily sunspot numbers declined 12 points to 38 during the past week - when compared to the previous week of December 30 through January 5 - when the average was exactly 50
     
14 Jan
  NZ4O Radiowave Propagation Forecast
     
09 Jan
  Propagation Report from Hannes Coetzee, ZS6BZP
Solar activity is still at low levels. Sunspots 1 140 and 1 142 remain visible although Sunspot 1 142 is rapidly fading away. The effective sunspot number is expected to be less than 25 for the coming week
     
08 Jan
  NZ4O Radiowave Propagation Forecast
The NZ4O LF/MF/HF/6M Frequency Radiowave Propagation Forecast #2011-02 has been published at 1600 UTC on Friday 01/07/2011
     
08 Jan
  Propagation de K7RA
Average daily sunspot numbers were up nearly 24 points this week to 50, and average daily solar flux rose over 9 points to 89.5
     
04 Jan
  G0KYA's HF Propagation Prediction Report, January 2011
Steve G0KYA
, of the RSGB's Propagation Studies Committee, has now published his short-path propagation prediction charts for the UK for January 2011
     
02 Jan
  Propagation Report from Hannes Coetzee, ZS6BZP
2010 came to a close with a flurry of new sunspots. One region rotated into view on the eastern limb, and at the same time, three new sunspots have suddenly popped up
     
 
 
 
 
 
 
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