[IRCA] Fw: ARLP018 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, May 05, 2006 7:55 AM
Subject: ARLP018 Propagation de K7RA


> SB PROP @ ARL $ARLP018
> ARLP018 Propagation de K7RA
> 
> ZCZC AP18
> QST de W1AW  
> Propagation Forecast Bulletin 18  ARLP018
>>From Tad Cook, K7RA
> Seattle, WA  May 5, 2006
> To all radio amateurs 
> 
> SB PROP ARL ARLP018
> ARLP018 Propagation de K7RA
> 
> This was a nice, quiet week with no notable geomagnetic activity.
> In fact, the middle latitude K index was 0 for a 36-hour period
> centered on April 30, and around the same time the high latitude
> college K index was 0 for 51 continuous hours. Average daily sunspot
> numbers were nearly double the previous seven days, rising over 29
> points to 59.7.
> 
> As this bulletin is being written early Friday morning, the IMF is
> pointing south, leaving Earth vulnerable to solar wind. The
> planetary A index reached 5 on Thursday, May 4, and over the weekend
> is predicted at 20, 30, 20 and 12 for May 5-8. Geophysical Institute
> Prague gives a forecast until May 11 of active geomagnetic
> conditions on May 5 and 6, unsettled May 7, quiet to unsettled May
> 8, quiet on May 9, back to unsettled on May 10, and unsettled to
> active on May 11.
> 
> April has ended, so this is a good time to look at average monthly
> sunspot numbers and solar flux for the past year.
> 
> The average daily sunspot numbers for the months April 2005 through
> April 2006 were 41.5, 65.4, 59.8, 68.7, 65.6, 39.2, 13, 32.2, 62.6,
> 26.7, 5.3, 21.3 and 55.2. Average daily solar flux for the same
> months was 85.9, 99.5, 93.7, 96.5, 92.4, 91.9, 76.6, 86.3, 90.8,
> 83.4, 76.5, 75.5 and 88.9.
> 
> Paul Peters, VE7BZ of Cobble Hill, British Columbia wrote in to say
> that conditions around those quiet days last week were fantastic.
> "On April 29, 30 and May 1, the 20 meter band conditions to Europe
> were almost unbelievable they were so good. On April 29 and 30, I
> called CQ once at 0300z and four hours later at 0700z I was still
> working down an endless pileup. Normally for us--living this far
> north--20m phone is usually dead in our evenings, but such was not
> the case recently. These were great nights!"
> 
> Cobble Hill is toward the southern end of Vancouver Island, just
> north of Victoria, and about 50 miles southwest of the city of
> Vancouver.
> 
> Richard Vincent, HS0ZFQ (he is KR7R when in the United States)
> retired from the postal service in Seattle and now lives in Chiang
> Rai in the far north of Thailand, between the borders with Laos and
> Myanmar (Burma). Over those same days at the end of April that VE7BZ
> wrote about, Richard wrote, "I was hearing stateside signals all
> over the place on 20 meter SSB starting about 1300z, which is 8:00
> PM local time. From this end VR2XMT, Charlie Ho in Hong Kong was
> running USA stations and so were a couple of the Russian big guns. I
> had not heard conditions like that since I got on the air here last
> October."
> 
> Richard currently uses a dipole, and has plans to soon put up a
> quad.
> 
> Last week's bulletin mentioned Greg Andracke, W2BEE of Pine Plains,
> in upstate New York, and his experience working Chagos on 30 meters
> early on a Saturday morning in mid-April. Several people wrote in to
> say that this was a normal time to work Chagos via the long path on
> that band. Actually, that is true for many other places in North
> America, but not where Greg is, in the Northeast.
> 
> The people we heard from were all south and west of Greg, although
> checking a propagation prediction program shows that the Southeast
> United States should have a good path as well. Southern California
> around that time on that date would have a very good short path
> opening to Chagos.
> 
> Dale Tongue, AC7NP, currently in El Paso, Texas wrote in to ask
> about sunspot graphs, and where he could find them on the web. For a
> graph of the last year of sunspots, check,
> http://wm7d.net/hamradio/solar/. Also see all recorded sunspot
> cycles back to 1749 at,
> http://wm7d.net/hamradio/solar/historical.shtml.
> 
> A graph of the current sunspot cycle is at,
> http://dawn.sec.noaa.gov/SolarCycle/, and you can compare recent
> cycles at, http://www.dxlc.com/solar/cyclcomp.html.
> 
> You can see http://www.dxlc.com/solar/ for a chart of the past few
> months, and check out the links lower on the page for interesting
> historical data.
> 
> And finally, Thomas Giella, KN4LF of Lakeland, Florida notes that he
> has started a new email listserver for radio propagation. See info
> on subscribing at,
> http://groups.yahoo.com/group/radiowavepropagation/.
> 
> 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 27 through May 3 were 63, 68, 64, 62, 51,
> 58 and 52 with a mean of 59.7. 10.7 cm flux was 100.7, 100.1, 101.2,
> 99.9, 93.4, 89.4, and 89, with a mean of 96.2. Estimated planetary A
> indices were 5, 12, 3, 1, 2, 4 and 3 with a mean of 4.3. Estimated
> mid-latitude A indices were 3, 10, 2, 0, 2, 4 and 2, with a mean of
> 3.3.
> NNNN
> /EX
> 
> 
>

_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://arizona.hard-core-dx.com/mailman/listinfo/irca

Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers

For more information: http://www.ircaonline.org

To Post a message: irca@xxxxxxxxxxxxxxxx