Subj : ARRL Propagation Bulletin
To : ALL USERS
From : DARYL STOUT
Date : Fri Dec 18 2015 04:54 pm
(CONTINUED FROM PREVIOUS MESSAGE)
On December 17 Jeff wrote:
"I just sent a report on the 10 meter contest, it was not a total
collapse (in reference to N0JK comments - Tad), but conditions were
noticeably down all day Sunday compared to Saturday and the skip
zone was much longer, especially to the south in the afternoon.
"Conditions and activity were a bit better than expected in the ARRL
10 meter contest last weekend. The K index was running mostly at 3
the first day and 1-2 Sunday with SFI up to 123 Sunday, but
continuing the pattern I have observed recently, Saturday was
actually a significantly better day.
"Friday evening, conditions were worse than I can ever remember. The
band was almost totally dead as it was after 24Z Saturday evening as
well. I worked only ME and two FL stations on meteor scatter Friday,
the rest were all within local working range which extends out to OH
(barely), CT, NY, and NJ.
"Saturday, my first QSO at 1224Z when I fired up was on CW with a
French station peaking around 120 degrees vs. normal heading of 55
via F2 scatter. Sunrise was about 1220Z. I continued to work the
East Coast on backscatter, Canary Is., Czech Republic, Netherlands,
and Germany all on F2 scatter except for African stations.
"At 1250Z, the first loud direct path Caribbean station was in the
Virgin Is. Around 1320 a couple of loud Quebec stations called via
Es on CW. Still on scatter beaming 90-120 degrees, numerous DLs in
Germany, Switzerland, Croatia, and Italy were logged until finally
at 1353Z a loud direct path CR7 in Portugal was found on SSB and
many EU QSOs followed until 1600Z when the band rapidly closed in
that direction.
"The northernmost extent of the opening was Scotland, Germany, and
Poland with a good number of Mediterranean area stations including
Macedonia and Israel.
"Dutch stations were loud and numerous as well as England for a
shorter time.
"Surprisingly, at 1432Z a fairly loud US5 in the Ukraine called
(never heard one in the CQWW on CW). Last year into EU lasted much
longer and farther north into all of northern EU at times. BY 1600Z,
stations to the west were loud and numerous which lasted all day
until 2100Z when the band started to fade.
"The skip zone was the shortest around 1700-1800Z right around local
noon here and just west of here.
"The skip zone with loud stations was as short as MS, LA, and MN
aided by some Es which probably also added some loud Texans. But,
the band never opened well to KS, MO, NE (one loud station only),
IA, and SD.
"CA was weak at times, but never almost gone like last year and the
Rocky Mountain states plus WA, OR, and AZ were easy to work as well
as VE4-VE7 (Manitoba thru British Columbia).
"Signals were good to the south as well down to Brazil and
Argentina, but the northern Caribbean faded out by around
1900-2000Z. I was called by Hawaii, New Zealand, and a weak QRP
station in Australia, but nothing else from the Pacific was heard
and I had to QRT at 2120Z before any hope of Asia might appear.
"Sunday was slow for new QSOs and propagation was worse despite
better solar indices. The first sweep of SSB band was devoid of any
signals. My first QSO was a OQ4 in Belgium at 1222Z on CW aided by
Es to the Canadian Maritimes which lasted until past 1345Z, but
activity in Canada was low (was called by PEI).
"I found few new stations in EU and had few answers to CQs. Most
signals were not strong that were worked all morning. Around 1400Z
was the peak of EU with Turkey, Ukraine, Poland, Czech and Slovak
Republics calling in on CW.
"Backscatter to the Eastern USA/VE beaming south around 1430-1530Z
was strong, but I had few callers on SSB despite some signals near
S9. The northern Caribbean was also loud that time, but faded out
for good by 1800Z.
"After 1520Z, EU was nearly gone working last one EI2 in Ireland at
1539Z. BY 1530Z stations in the far western USA were loud, so I
turned my attention that direction with excellent signals also from
Mexico where several new XE states called in on CW. By 18Z
backscatter had gotten weaker and continued to worsen and only
mostly deep SA stations were workable to the south. I did have
decent conditions to CO/NM and farther west and worked quite a few
CA stations, but OR/WA was much weaker than Saturday. The west coast
was gone by 2200Z only 10 minutes past sunset and my last SA QSO was
with Peru at 2225Z which ended any ionospheric propagation for the
day. Of note was a QSO with VE8NSD in the NW Territories at 2049Z on
SSB, my only Arctic QSO (no AK). I worked all of the provinces
except for Nunavut and Yukon between both modes.
"I ended up with 140 California QSOs, 82 from Arizona, and 73 from
Washington, 60 from Maryland (locals) totaling 1317 with 204
multipliers.
"Both QSOs and multipliers were way down from 2014, but there was
plenty of activity except a bit sparse Sunday afternoon."
David Moore sent this link to a time-lapse video from way back in
2003 of a huge solar flare. Just click on the big black space
between the two blue arrows to watch at,
https://shar.es/1Gg1US .
The snow-like artifacts were caused by radiation from the flare
overloading the camera in the observatory (SOHO). Check this for
more info on SOHO at,
http://sohowww.nascom.nasa.gov/ .
David also sent a link about the NRAO Very Large Array studying
solar flares:
http://www.sciencedaily.com/releases/2015/12/151203150131.htm
More info on the VLA:
http://public.nrao.edu/explorer/vla/TheVLAExplorer.php
I like this image:
http://public.nrao.edu/explorer/vla/TheVLAExplorer.php?map=ArraySite
We have a couple of reports from Jon Jones, N0JK, first regarding
the recent 10 meter contest:
"The 10 meter band 'collapsed' Sunday afternoon (December 13) for
many stations in Central and northern South America to North America
in the ARRL 10 meter contest. Steve, PJ4DX posted in his '3830'
contest report that he was frustrated hearing loud PY and LU
stations still running mainland USA stations Sunday afternoon and
these NA stations were completely inaudible for him."
PJ4DX is on the island of Bonaire, which lies off the coast of
Venezuela in the Southern Caribbean.
Two days later, on December 16, Jon wrote:
"A long lasting 6 meter Es morning opening December 16.
"Here in Eastern Kansas, Michigan and Ohio stations were loud
including the NF8M/b 50.076 MHz in EN82 which was 599 at 1710z. It
runs just 5 watts to a ground plane antenna!
"Later the Es moved west and as I write stations in western Colorado
and Utah are working the Pacific Northwest at 1935z."
The beacon station that Jon mentioned in his report:
http://www.nf8m.com/
For the next two weeks, even with the holidays, this bulletin will
still come out on Friday, December 25 and Friday, January 1. There
will be no ARRL Letter during those weeks.
If you would like to make a comment or have a tip for our readers,
email the author at,
[email protected].
For more information concerning radio propagation, see the ARRL
Technical Information Service web page at
http://arrl.org/propagation-of-rf-signals. For an explanation of the
numbers used in this bulletin, see
http://arrl.org/the-sun-the-earth-the-ionosphere. An archive of past
propagation bulletins is at
http://arrl.org/w1aw-bulletins-archive-propagation. More good
information and tutorials on propagation are at
http://k9la.us/.
My own archives of the NOAA/USAF daily 45 day forecast for solar
flux and planetary A index are in downloadable spreadsheet format at
http://bit.ly/1VOqf9B and
http://bit.ly/1DcpaC5 .
Click on "Download this file" to download the archive, and ignore
the security warning about file format. Pop-up blockers may suppress
the download.
Monthly propagation charts between four USA regions and twelve
overseas locations are at
http://arrl.org/propagation.
Instructions for starting or ending email distribution of ARRL
bulletins are at
http://arrl.org/bulletins.
Sunspot numbers for December 10 through 16 were 86, 77, 89, 74, 81,
64, and 49, with a mean of 48. 10.7 cm flux was 108.5, 113.7, 116.7,
122.5, 124, 118.9, and 126.2, with a mean of 102.2. Estimated
planetary A indices were 23, 20, 12, 8, 22, 17, and 7, with a mean
of 9.9. Estimated mid-latitude A indices were 18, 14, 8, 6, 15, 13,
and 5, with a mean of 6.6.
NNNN
/EX
--- BgNet 1.0a12 - The Thunderbolt BBS wx1der.dyndns.org Little Rock, AR
