|
 |
| |
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 |
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 |
| |
|
|
|
| |
| |
| |
| |
| |
| |
|
|
|
|
|
