By David, on October 8th, 2010%
SB PROP @ ARL $ARLP040 ARLP040 Propagation de K7RA
ZCZC AP40 QST de W1AW Propagation Forecast Bulletin 40 ARLP040 >From Tad Cook, K7RA Seattle, WA October 8, 2010 To all radio amateurs
SB PROP ARL ARLP040 ARLP040 Propagation de K7RA
Solar activity quieted down over the past week. There were no sunspots on Wednesday and Thursday, October 6-7, and the average daily sunspot number declined nearly 18 points to 27.6, compared to the previous week. Average daily solar flux values were off over three points to 81. Predicted solar flux for the next ten days, October 8-17 is 76, 78, 78, 80, 80, 80, 80, 82, 81 and . . .
To read the rest of this article, please click here: → Propagation Report October 8, 2010
By David, on October 1st, 2010%
SB PROP @ ARL $ARLP039 ARLP039 Propagation de K7RA
ZCZC AP39 QST de W1AW Propagation Forecast Bulletin 39 ARLP039 >From Tad Cook, K7RA Seattle, WA October 1, 2010 To all radio amateurs
SB PROP ARL ARLP039 ARLP039 Propagation de K7RA
HF radio conditions were good over this past week, with average daily sunspot numbers up more than five points to 45.3, and average solar flux rising 1.5 points to 84.4. On Wednesday, September 29 solar flux was 90.7. The last time flux values were nearly this high was August 7 at 90.5, and it last topped this value at 91.8 on March 13, 2010.
A coronal wind on . . .
To read the rest of this article, please click here: → Propagation Report October 1, 2010
By David, on September 17th, 2010%
SB PROP @ ARL $ARLP037 ARLP037 Propagation de K7RA
ZCZC AP37 QST de W1AW Propagation Forecast Bulletin 37 ARLP037 >From Tad Cook, K7RA Seattle, WA September 17, 2010 To all radio amateurs
SB PROP ARL ARLP037 ARLP037 Propagation de K7RA
Average daily sunspot numbers this week dropped nearly 23 points to 15.6, and geomagnetic indices were quiet. The average daily solar flux was 78.1, but the latest prediction from USAF and NOAA is for rising solar flux values. The September 17-23 projection has solar flux values at 85, 85, 86, 86, 86, 87, and 88, which is well above last week’s average. Solar flux hasn’t been to 88 . . .
To read the rest of this article, please click here: → Propagation Report September 17, 2010
By David, on September 10th, 2010%
SB PROP @ ARL $ARLP036 ARLP036 Propagation de K7RA
ZCZC AP36 QST de W1AW Propagation Forecast Bulletin 36 ARLP036 >From Tad Cook, K7RA Seattle, WA September 10, 2010 To all radio amateurs
SB PROP ARL ARLP036 ARLP036 Propagation de K7RA
Average daily sunspot numbers for the week rose nearly 13 points to 38.3, and average daily solar flux was up over four points at 78.4. On September 2 one new sunspot group emerged, numbered 1105. It joined sunspot groups 1101, 1102 and 1103. On September 4, group 1102 faded away, then 1101 and 1103 vanished on September 6. 1105 went over the western side of the Sun by . . .
To read the rest of this article, please click here: → Propagation Report September 10, 2010
By David, on September 3rd, 2010%
SB PROP @ ARL $ARLP035 ARLP035 Propagation de K7RA
ZCZC AP35 QST de W1AW Propagation Forecast Bulletin 35 ARLP035 >From Tad Cook, K7RA Seattle, WA September 3, 2010 To all radio amateurs
SB PROP ARL ARLP035 ARLP035 Propagation de K7RA
Over this past week four new sunspot groups appeared. Group 1101 was already in place since August 24, and 1102 emerged on August 29. On September 1 both new sunspot groups 1103 and 1104 appeared, and on September 2 sunspot group 1105 arrived. Over August 26 to September 2 the daily sunspot numbers were 23, 11, 11, 25, 28, 27, 51, and 52 and over those same eight . . .
To read the rest of this article, please click here: → Propagation Report September 3, 2010
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