[IRCA] Fw: ARLP017 Propagation de K7RA

["Art Blair" <artngwen@xxxxxxxxxx>]

----- Original Message ----- 
From: "W1AW Mailing List" <w1aw-list-request@xxxxxxxxxxxxxxxxx>
To: <artngwen@xxxxxxxxxx>
Cc: <W1AW List:>
Sent: Friday, April 28, 2006 12:21 PM
Subject: ARLP017 Propagation de K7RA


> SB PROP @ ARL $ARLP017
> ARLP017 Propagation de K7RA
> 
> ZCZC AP17
> QST de W1AW  
> Propagation Forecast Bulletin 17  ARLP017
>>From Tad Cook, K7RA
> Seattle, WA  April 28, 2006
> To all radio amateurs 
> 
> SB PROP ARL ARLP017
> ARLP017 Propagation de K7RA
> 
> Geomagnetic conditions were quiet this week in most places, but on
> April 22 there was a geomagnetic storm at high latitudes caused by
> solar wind and a south-pointing IMF. The college A index in
> Fairbanks Alaska reached 38, and the K index was 7 at its highest.
> The mid-latitude A index for the day was only 10, just slightly
> unsettled.
> 
> On April 27 there was a strong but brief solar flare from sunspot
> 875, but this is not expected to cause major geomagnetic activity.
> At the time of the flare, around 1552z, x-rays caused a short radio
> blackout of nearly a quarter hour.
> 
> Sunspot numbers and solar flux have been rising, and solar flux is
> expected to remain around 100 over the next week. Geomagnetic
> conditions may become active again around May 2 and May 6, with a
> big increase in activity around May 10-13 expected because of
> similar activity during the previous solar rotation.
> 
> Steve Lybarger, NU7T of Reno, Nevada wrote asking about sunspot
> polarity, and where he could get information on the actual polarity
> of currently visible spots. I told him I didn't know, but did find
> this interesting page from "Mr. Sunspot's Answer Book" at the
> National Solar Observatory web site,
> http://eo.nso.edu/MrSunspot/answerbook/polarity.html.
> 
> Ron Wright, ZL1AMO (and others, including AE6RR) wrote in to say
> that ZK1JD, mentioned in last week's bulletin as worked by VA7GO, is
> not actually in the South Solomon Islands, an area of great civil
> unrest currently. Jim Ditchburn, ZK1JD is actually in Rarotonga in
> the South Cook Islands. Craig Bradley, AE6RR worked ZK1JD a few days
> ago on 20 meters, and when told about his call appearing in the
> bulletin, Jim commented that he "would not want to be in the Solomon
> Islands at this time!"
> 
> Greg Andracke, W2BEE of Pine Plains, New York tells about some
> unexpected propagation from a couple of weeks back. On Saturday,
> April 15 at 1123z he heard VQ9LA of Chagos calling CQ on 30 meters
> with no takers. Greg scrambled to tune his 20-meter vertical to 30
> meters, and reached VQ9LA, neither station having strong signals.
> Afterward Greg could hear no other stations called the DX station.
> Odd propagation for that time, but it would have been normal about
> 10-14 hours later.
> 
> If you would like to make a comment or have a tip for our readers,
> email the author at, k7ra@xxxxxxxxx
> 
> 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 at http://www.arrl.org/w1aw/prop/.
> 
> Sunspot numbers for April 20 through 26 were 30, 14, 15, 24, 38, 33
> and 60 with a mean of 30.6. 10.7 cm flux was 78.7, 76.4, 82.4, 86.7,
> 92.8, 95.1, and 100, with a mean of 87.4. Estimated planetary A
> indices were 5, 8, 18, 8, 7, 5 and 5 with a mean of 8. Estimated
> mid-latitude A indices were 3, 6, 10, 8, 4, 1 and 2, with a mean of
> 4.9.
> NNNN
> /EX
> 
>

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