[DX-NEWS] ARLP021 Propagation de K7RA
SB PROP @ ARL $ARLP021 ARLP021 Propagation de K7RA ZCZC AP21 QST de W1AW Propagation Forecast Bulletin 21 ARLP021 From Tad Cook, K7RA Seattle, WA May 24, 2013 To all radio amateurs SB PROP ARL ARLP021 ARLP021 Propagation de K7RA Overall, solar activity is still pretty quiet, but one positive sign was on May 16, when the daily sunspot number was 212. I eyeballed the records, and had to keep searching further and further back to find a higher sunspot number. One year, six months and one week earlier, on November 9, 2011 the sunspot number was nearly that high, at 208. We look clear back seven years, 10 months and 12 days to July 4, 2005, another near miss at 192. To find activity beating the May 16 number we have to go back nearly a decade, to November 1, 2003 when the daily sunspot number was 277. This was way back on the downward slide of cycle 23, nine years, six months and 15 days earlier than our recent high number. Let's hope for many more days like this. That seems likely, as the peak of this solar cycle is predicted for this fall, which begins about four months from now, on Sunday, September 22. Compared to the previous period (May 9-15) average daily sunspot numbers this week were down over 12 points to 144. Average daily solar flux sank nearly 6 points to 134.2. Geomagnetic activity was higher, with average daily planetary A index up 3.7 points to 9.7, and average daily mid-latitude A index up 4.4 points to 10.3. It should be noted that five of the eight daily geomagnetic readings which make up the A index were not recorded for May 16 at the mid- latitude observatory, so the mid-latitude A index of 12 for that day is an estimate. The latest prediction from NOAA/USAF has solar flux at 135 on May 24-25, 130 on May 26-27, 135 on May 28-29, and then 130, 115, 105 and 110 on May 30 through June 2, 120 on June 3-5, and 125 on June 6-8, before rising to a short-term peak of 140 on June 12-13. This prediction is a bit far off, but it also shows a minimum flux value of 100 on June 26-27. Turning to geomagnetic activity, predicted planetary A index is 15, 20, 12 and 8 on May 24-27, 5 on May 28 through June 10, and then 8, 12 and 8 on June 11-13, 5 on June 14-17, and then 15, 12, 8 and 5 on June 18-21. On June 24, a month and about one solar rotation from now, they show planetary A index rising from 5 to 15, perhaps an echo of current geomagnetic activity. OK1HH predicts active to disturbed geomagnetic conditions May 24, quiet to active May 25, mostly quiet May 26-27, quiet to active May 28, quiet to unsettled May 29, quiet May 30, quiet to unsettled May 31 through June 1, mostly quiet June 2, quiet to unsettled June 3, quiet June 4-8, mostly quiet June 9-10, quiet to active June 11, active to disturbed June 12-13, quiet to unsettled June 14, and mostly quiet June 15-16. The CQ World Wide WPX Contest, CW weekend begins tonight/tomorrow at UTC May 25. The geomagnetic activity predicted for this weekend may add some additional challenge to the test, which has a new set of rules. The multiplier used is the number of unique call sign prefixes of stations worked. See details at http://www.cqwpx.com/rules.htm. The current geomagnetic activity is due to a May 22 M5 class solar flare, which is expected to deliver a glancing blow to our geomagnetic field today, May 24. Jon Jones, N0JK reports that during a six meter e-layer opening last Sunday evening observed from coast to coast in North America, a rare Australia to North America opening took place. From 2355 UTC on May 19 until 0032 UTC on May 20 on CW VK4MA worked W9FF, NW0W, K9ZM, WZ8D, W9WZJ and K0GU. It appears the longest distance was to WZ8D, about 9,041 miles. N0JK believes the propagation path was via e-layer linked to trans-equatorial propagation. Last Friday, May 17 Jim Smith, K3RTU took his backpack rig into Ridley Creek State Park in Southeast Pennsylvania (FM29). He wrote: After some hiking I set up my Buddistick vertical and new KX3 about 1730. I tried 15 meters first, but had no luck and only heard a few stations, so I readjusted the antenna for 17 meters and after a few minutes worked Duncan, EA5ON/M with SSB and got a 54 report. Not too bad for vertical to vertical, but the QRN on his end was troublesome. Duncan told me it was raining there with lots of atmospheric noise and later contacts with Western Europe confirmed the bad weather was pretty wide spread. Then over the next two hours worked Dave VP5/W5CW (my report 59), Mario DJ2OR (55), Carolyn W5/G6WRW near Santa Fe, NM (53), Al VE7WJ (53), Joe DF9ZP (59), KB5AVE (56), and last, Mike IF9ZWA (55) on Favignana Island off the coast of Sicily. What amazed me the most was that I had good propagation both east and west of my location which I don't always find to be the case. And finally, I just ran across a previously overlooked email from Wayne Mills, N7NG of Jackson Hole, Wyoming sent on January 4, 2013, reflecting on cycle 19. Wayne said, I
[DX-NEWS] ARLP021 Propagation de K7RA
SB PROP @ ARL $ARLP021 ARLP021 Propagation de K7RA ZCZC AP21 QST de W1AW Propagation Forecast Bulletin 21 ARLP021 From Tad Cook, K7RA Seattle, WA May 25, 2012 To all radio amateurs SB PROP ARL ARLP021 ARLP021 Propagation de K7RA Average daily sunspot numbers declined seven points over the past week to 110.3. Average daily solar flux dropped 3.3 points to 131. Unsettled geomagnetic conditions over the past few days most likely resulted from an interplanetary shock wave originating from a solar flare on May 20. Predicted planetary A index is 8, 5, and 8 on May 25-27, then 5 on May 28 to June 4, then 8, 12, 15, 10 and 8 on June 5-9, then 5 on June 10-11, 8 on June 12-13, 5 on June 14-16, then 8, 15, 10 and 8 on June 17-20, and 5 on June 21-25. Predicted solar flux is 115 on May 25, 110 on May 26 through June 1, 125 on June 2-3, 130 on June 4, 135 on June 5-9, 130 on June 10, 125 on June 11-12, and 120 on June 13-15. Six new sunspot groups arose since May 15, one each on May 15, 18, 20, 22, 23 and 24. Until June 4, predicted solar flux values are below the average for the past week, 127.7. We are again receiving geomagnetic forecasts from the Czech Republic, this from Frantisek K. Janda, OK1HH of Ondrejov, from the Czech Propagation Interest Group. He predicts quiet to unsettled conditions on May 25-26, quiet on May 27-28, mostly quiet May 29, quiet to active May 30, quiet May 31 to June 1, mostly quiet on June 2, quiet to unsettled June 3, quiet to active June 4, active on June 5, quiet to active June 6, active on June 7, quiet to active June 8, quiet to unsettled June 9, quiet June 10-11, quiet to active June 12, mostly quiet June 13, and quiet to unsettled on June 14-15. OK1HH says that on May 30-31 and again on June 5 there is a high probability of changes in the solar wind, which may cause changes in the magnetosphere and ionosphere. Bill Lauterbach, WA8MEA of Hanover, Michigan had a question about MUF (Maximum Usable Frequency) and LUF (Lowest Usable Frequency). He says the LUF seems to have changed so that it is sometimes close to the MUF in the current cycle. He wonders if LUF should be lower when MUF is higher. We passed this on to Carl Luetzelschwab, K9LA. Carl commented, The MUF is determined by the amount of ionization - most of the time it's the amount of ionization in the F2 region that sets the MUF. And you can't do anything to your station to change the MUF. The LUF is essentially determined by absorption in the D region. You can lower the LUF on a given path by increasing transmit power or increasing your antenna gain or somehow reducing your man-made noise. In essence your LUF is the frequency at which the received signal is at your noise level. Since a higher MUF means more ionization, it seems to me that generally there would be more absorption, too, which would increase the LUF. Thanks, Carl! Another Carl, N5XE, Carl Hickman of Sulphur, Oklahoma wrote On Thursday evening (0330 UTC Friday, May 25, 2012), I called CQ on 15 meters. TA2KN answered my call with a 599 plus signal. He was so strong, I was hearing an echo on his signal (both short and long paths), which made copy somewhat tough. Both paths were strong -- he was LOUD! I had to use my attenuator to lessen the effects of his long path signals. Less than 10 minutes later, I worked N5RB on the same band (short skip for me). After 33 plus years as a ham, I am still amazed at propagation conditions that crop up from time to time. It's always fun to participate in rare openings on the bands. Thanks, Carl. TA2KN is at a scout camp in Turkey, where they have quite a nice antenna system. Carl worked them at what is probably the best time of the day on 15 meters over that path at this time of year. I see that the short skip distance that Carl mentioned between N5RB (Ecru, Mississippi) and N5XE in Oklahoma is 452 miles. I calculated that by looking up their licensed addresses on a map, then using the latitude and longitude for each station to calculate distance on W6ELprop. Carl heard the station in Turkey on both long and short paths, and those distances are 6,194 miles and 18,680 miles. This was calculated using the location for the scout camp shown on http://aprs.fi/info/a/TA2KN, which is 41.07 degrees north latitude, 29.117 degrees east longitude. Don Kalinowski, NJ2E of Cary, North Carolina alerted us to the National Air and Space Lecture Series, and one about the Solar Dynamics Observatory. See it at http://airandspace.si.edu/events/eventDetail.cfm?eventID=2768 and click on the View Archived Recording link to watch the 71 minute video, titled The Solar Dynamics Observatory: The Sun Up Close and Personal. Jon Jones, N0JK of Lawrence, Kansas fills us in on 6 meter activity with a station in Argentina. He wrote, Some interesting propagation on 6 Meters the afternoon of May 19. K0HA EN10 NE reported working LU1DMA around 2010 UTC. I went out portable with a 2- element Yagi.
[DX-NEWS] ARLP021 Propagation de K7RA
SB PROP @ ARL $ARLP021 ARLP021 Propagation de K7RA ZCZC AP21 QST de W1AW Propagation Forecast Bulletin 21 ARLP021 From Tad Cook, K7RA Seattle, WA May 27, 2011 To all radio amateurs SB PROP ARL ARLP021 ARLP021 Propagation de K7RA The bulletin this week is coming to you from Felton, California, where your author is attending a camp for blues dancers. Our Sun was certainly quieter this week. Average daily sunspot numbers were down nearly 17 points to 51.6, and average daily solar flux declined nearly 9 points to 83.2. The latest prediction is for solar flux to remain low at about 85 on May 27-29, 80 on May 30 through June 3, then rise to 90 on June 4, then 85 on June 5-7, and back to 90 on June 8-11, peaking at 95 on June 12. The same prediction has some geomagnetic activity this weekend, with planetary A index on May 27-30 at 10, 15, 12, and 10, then declining to 5 on May 31 and into the first week of June. The moderate activity on Saturday (May 28) is due to a solar wind stream. Geophysical Institute Prague predicts unsettled conditions on May 27, active conditions May 28, unsettled May 29-31, and quiet on June 1-2. Things may seem quiet on this (the Earth-facing) side of our Sun, but a peek at http://stereo.gsfc.nasa.gov/ shows much more activity on the far side. All those white spots represent magnetic activity, and some could indicate sunspot activity. If we assume that (depending partly on latitude) the Sun takes a little less than 28 days (approximately 27.5 days) for a single revolution relative to Earth, and there are 12 longitudinal sectors displayed, each one represents about 2.29 days, or about 55 hours. This can help you make a rough estimate of how long it takes an area on the far side to rotate across the horizon, which is at 90 degrees. Currently three sunspot groups (numbered 1216, 1222 and 1223) are visible, and another may be emerging. Somehow a month ago I missed this announcement about the solar flux and geophysical announcements on WWV going away. Beginning September 6, there will be no more announcements at 18 minutes after the hour with solar flux, K and A index. This was reported on the League website at http://www.arrl.org/news/space-weather-prediction-center-to-discontinue-broadcasts-on-wwv- and-wwvh. Jeff Hartley, N8II of Shepherdstown, West Virginia sent a report on May 23: There's not much of an exciting nature to report except that 15M openings to EU seem pretty commonplace up to at least 22Z with very good signals despite being well after dark (except in far western and NW EU), despite the lower flux which was 85 today, 5-23. Saturday 5-21, there was plenty of activity thru the day in the EA King of Spain and UN DX contests on 15M from 13Z when I turned on the radio. There was the expected weakening of signals around noon and then strengths increasing from 19Z thru the early evening. EU signals on 20 were weak in the morning which was pretty much expected due to the shift to summer conditions and increased absorption. Around 1330-1430Z signals were good on 20 from JA across to Kazakhstan which was more active than usual with the UN DX Contest. Around 24Z, I again was active on 20 most of the time until 03Z with best signals from UN in the 24Z hour and conditions gradually improved farther west with northern EU such as LY, SM, OH and EU Russians workable all with good signals, but some very fluttery. Between the EU and AS Russians and UN's, I was pretty busy running stations from 02-03Z working a total of 15 UN regions for the day (almost every station is in a different region). There was sporadic E to the upper Midwest on Sunday around 01Z with one loud signal from EN32 in IA on 6M and several on 10M. 12M is still frequently open to the south including Caribbean thru much of the day starting around 15Z. Jon Pollock, K0ZN of DeSoto, Kansas (EM28) sent this in on May 21: The upper HF bands were excellent last night. I worked a bunch of Russian and European DX on 17 M between 10PM and Midnight. The interesting part was 15 M. At 11PM CDT, I tuned the band and found 3 groups of digital signals around 21.070. Obviously, I have no idea what or who, but they were pretty strong. So I tuned up in to the phone band, this is now about 11:15 PM and heard a 'local' rag chew between a couple of W4's and a W5. It sounded like backscatter. Then I heard K0FPL in Kansas City chatting with AB0RJ in St. Louis via 250 mile back scatter path. I read the mail on their QSO, but no other signals on the band. It sounded very dead. Then I heard a 'break', someone wanting to break into their QSO. It was a strong signal so I figured someone local. NOT! It was E51CG in the Cook Islands! Holy Toledo! The Western Pacific! By now it was well after 11 PM CDT. Another case of 15 M being 'dead' in the middle of the night. The E51 guy chatted with them for about 10 minutes and gave the locals, 10 db over S-9 reports in Raratonga, Cook Islands! Trust me,
[DX-NEWS] ARLP021 Propagation de K7RA
SB PROP @ ARL $ARLP021 ARLP021 Propagation de K7RA ZCZC AP21 QST de W1AW Propagation Forecast Bulletin 21 ARLP021 From Tad Cook, K7RA Seattle, WA May 28, 2010 To all radio amateurs SB PROP ARL ARLP021 ARLP021 Propagation de K7RA This weekend is the CQ World Wide WPX CW Contest, and conditions may be a little rough. Our current sunspot group 1072 has reached the Sun's western horizon and is shrinking besides, and what looked like a possible emerging spot on Wednesday was not to be. There is a stiff solar wind heading toward Earth, and predicted planetary A index for May 28-31 is 20, 20, 22 and 15. Predicted solar flux is 73 for May 28-29, 75 for May 30 through June 3, then 80, 78, 76, 75 and 70 for June 4-8. This prediction is from NOAA and USAF on May 27, but on May 26 they predicted a solar flux of 76, 78, 80, 82, 82, 79, 80, and 80 for May 28 through June 4. Geophysical Institute Prague predicts a minor geomagnetic storm for May 28, active conditions May 29, quiet to unsettled May 30, unsettled May 31 to June 1, quiet to unsettled June 2, and quiet conditions June 3. The STEREO spacecrafts at http://stereo.gsfc.nasa.gov/ currently view about 89.5 percent of the Sun. A month from now they will see 90.3 percent, in two months the coverage will be 91.4 percent, and it will be 92.8 percent in three months. Currently they see a bright spot about 30 degrees west of the sun's eastern horizon, but this doesn't appear to be a new sunspot group, at least not yet. Thanks to Scott Bidstrup W7RI for the heads up on an interesting article from Scientific American on our Sun's odd behavior and low activity. Read it at http://tinyurl.com/35ez8tb. Julian Moss, G4ILO has been using WSPR (Weak Signal Propagation Reporter) to search for marginal or unknown propagation paths. He writes, With the Sporadic-E season starting I thought that I would try WSPR on 10m to spot band openings. What has been surprising is the consistent paths between stations in Faroe Islands and Iceland and the UK and Western Europe. The paths were occurring even during the period of no sunspots and occurred when no other long distance propagation was being reported between WSPR stations anywhere else. I would have not expected the F2 MUF to be high enough to support propagation at that time and that latitude. I don't think many people have regularly tried 10m at other times so I don't know if this has been observed before. I haven't found any actual activity on 10m at this time but of course OY and TF are not in parts of the world with a lot of amateurs. At http://blog.g4ilo.com/2010/05/10m-open-to-north.html Julian has a nice map illustrating this on his blog. See http://wsprnet.org/drupal/ for details on WSPR. At http://www.g4ilo.com/wspr.html Julian has a nice description of how WSPR works. Bob Brown, NM7M, a true radio propagation guru passed away this week at age 87. See the announcement at http://www.arrl.org/news/robert-brown-phd-nm7m-sk. In addition to teaching physics at University of California at Berkeley, he wrote The Little Pistol's Guide to HF Propagation. If you would like to make a comment or have a tip for our readers, email the author at, k...@arrl.net. For more information concerning radio propagation, see the ARRL Technical Information Service 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. 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 May 20 through 26 were 12, 15, 20, 23, 17, 16, and 11 with a mean of 16.3. 10.7 cm flux was 68.8, 70.9, 72.5, 74.5, 72.6, 73.2 and 72.4 with a mean of 72.1. Estimated planetary A indices were 9, 5, 4, 2, 2, 5 and 6 with a mean of 4.7. Estimated mid-latitude A indices were 9, 4, 2, 0, 0, 4 and 5 with a mean of 3.4. /EX --- To unsubscribe or subscribe to this list. Please send a message to imail...@njdxa.org In the message body put either unsubscribe dx-news or subscribe dx-news This is the DX-NEWS reflector sponsored by the NJDXA http://njdxa.org ---
[DX-NEWS] ARLP021 Propagation de K7RA
SB PROP @ ARL $ARLP021 ARLP021 Propagation de K7RA ZCZC AP21 QST de W1AW Propagation Forecast Bulletin 21 ARLP021 From Tad Cook, K7RA Seattle, WA May 16, 2008 To all radio amateurs SB PROP ARL ARLP021 ARLP021 Propagation de K7RA We've had another week with no sunspots. Our reporting week for this bulletin runs from Thursday through Wednesday, and this is the fifth bulletin of the year reporting zero sunspots for the week. The others were Propagation Forecast Bulletins ARLP003, 4, 7 and 8. All of the remaining 16 bulletins had at least one day with sunspots in the reporting period. Geomagnetic indices were quiet. But next Tuesday, May 20 should be quite active. The predicted planetary A index for May 16-22 is 5, 5, 5, 12, 30, 15 and 8. Geophysical Institute Prague expects quiet conditions May 16-18, quiet to unsettled May 19, active geomagnetic conditions May 20, unsettled May 21, and quiet to unsettled May 22. Last week's bulletin lamented the transition from analog television on Channel 2, because signals on that frequency have been a popular indicator for 6 meter DX. Several readers wrote in about the low TV Channels 2-6, and mentioned possibilities for continuing to use broadcast transmitters there for propagation beacons. There are also examples of digital TV being received a long distance from the transmitter site. Patrick Dyer, WA5IYX of San Antonio, Texas sent in a number of useful links, and mentioned a pilot carrier 310 KHz above the bottom of each DTV channel, useful for detecting skip signals. For Channels 2-6, you can plug these frequencies into your scanner: 54.31 MHz, 60.31 MHz, 66.31 MHz, 76.31 MHz and 82.31 MHz. Of course, you would want to skip any frequencies that are used locally. He sent a link to http://tinyurl.com/5qpykr showing low band DTV station info. The site http://tinyurl.com/5z2ocb links to an article about a Channel 2 DTV signal from Florida received over 1,000 miles away in New England. From http://tinyurl.com/6jxet4 you can download a PowerPoint file with info on using pilot signals to detect a DTV station below the level that enables a usable DTV service. If you don't have Microsoft PowerPoint, you can download a free PowerPoint viewer from http://tinyurl.com/y5c796. Pat is an avid TV/FM DXer, and has a web page devoted to his interests at, http://home.swbell.net/pjdyer/index.html. Fred Stone, W8LLY of Bellbrook, Ohio is Director of Engineering for WPTD-TV in Dayton, Ohio, and he noted that post-transition television will be broadcast on Channels 2-51. He said FCC records show Channel 2 stations in Flagstaff AZ, Grand Junction CO, Bangor ME, North Platte NE, Las Vegas NV, Rapid City SD, and Jackson WY. Jon Jones, N0JK of Kansas reports widespread 6 meter E-skip openings May 13, in the USA from 1900z-0300z. 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://www.arrl.org/tis/info/propagation.html. For a detailed explanation of the numbers used in this bulletin see, http://www.arrl.org/tis/info/k9la-prop.html. An archive of past propagation bulletins is at http://www.arrl.org/w1aw/prop/. Monthly propagation charts between four USA regions and twelve overseas locations are at http://www.arrl.org/qst/propcharts/. Instructions for starting or ending email distribution of this bulletin are at http://www.arrl.org/w1aw.html#email. Sunspot numbers for May 8 through 14 were 0, 0, 0, 0, 0, 0, and 0 with a mean of 0. 10.7 cm flux was 66.4, 67.3, 67.4, 68, 68, 68.3, and 69 with a mean of 67.8. Estimated planetary A indices were 4, 3, 5, 3, 4, 4 and 3 with a mean of 3.7. Estimated mid-latitude A indices were 3, 3, 4, 3, 3, 3 and 1, with a mean of 2.9. /EX -- Archives http://www.mail-archive.com/dx-news@njdxa.org THE DXR is sponsored by the North Jersey DX Association. Please visit our website: http://www.njdxa.org/index.php To subscribe/unsubscribe, please send request to [EMAIL PROTECTED] and allow a few hours for acknowledgement --
RE: [DX-NEWS] ARLP021 Propagation de K7RA
From:[EMAIL PROTECTED]Reply-To:[EMAIL PROTECTED]To:dx-news@njdxa.orgSubject:[DX-NEWS] ARLP021 Propagation de K7RADate:Fri, 18 May 2007 13:26:47 -0400SB PROP @ ARL $ARLP021ARLP021 Propagation de K7RA take me off your mailing list [EMAIL PROTECTED] PC Magazines 2007 editors choice for best Web mailaward-winning Windows Live Hotmail. --Archives http://www.mail-archive.com/dx-news@njdxa.orgTHE DXR is sponsored by the North Jersey DX Association.Please visit our website:http://www.njdxa.org/index.phpscroll to bottom for subscribe/unsubscribe options--
[DX-NEWS] ARLP021 Propagation de K7RA
SB PROP @ ARL $ARLP021 ARLP021 Propagation de K7RA ZCZC AP21 QST de W1AW Propagation Forecast Bulletin 21 ARLP021 From Tad Cook, K7RA Seattle, WA May 19, 2005 To all radio amateurs SB PROP ARL ARLP021 ARLP021 Propagation de K7RA There was so much remarkable solar and geomagnetic activity over the last weekend that we put out a special bulletin Sunday night. If you missed it, find it at http://www.arrl.org/w1aw/prop/, which has an archive of past propagation bulletins. The last bulletin reported a TV DXer in Florida who copied a channel 2 television broadcaster in Iowa. Bill Smith, W0WOI of Jefferson, Iowa wrote to say that the TV DX was probably due to sporadic-E skip. This is propagation through the E layer of the ionosphere (lower than the F layers) that occurs in May, June and early July, and is responsible for a many 6 and 10 meter openings, even when there aren't many sunspots. Bill said that KGAN is one of the more frequently reported stations nationwide due to its geographical location and channel 2 frequency, just above 6 meters. By the way, Bill is the former editor of The World Above 50 MHz, the monthly column devoted to VHF in QST. Ray Bass, W7YKN in Sparks, Nevada reports that last Friday he was working W7QCY in Portland, Oregon on 40 meters, and around 9:40 AM local time signals started to fade. A few minutes later, the band was completely dead, no doubt due to the effects of the coronal mass ejection. Dave Greer, N4KZ in Frankfort, Kentucky wrote that Tuesday, May 17 was a very interesting day for 6 meter fans. He worked stations all over South and Central America as well as the Caribbean (LU, CX, TI, VP5, ZF, HK) from late afternoon into evening. He said there were many strong signals, but for some stations the conditions weren't reciprocal. He heard HK3JRL in Bogota call CQ repeatedly with no answer to responses. He heard a number of YV and KP4 stations that he could not work. Reviewing numbers from the past week, solar flux and sunspot numbers were lower than the week before, and of course the big excitement was May 15 when the planetary A index reached 105. For the next week expect low solar flux and sunspot activity. Sunspot 759, the source of all the excitement, is passing off the solar disk. Geomagnetic conditions should be unsettled for Thursday and Friday, May 19 and 20, but expect quiet conditions after that. Recurring coronal holes could produce active geomagnetic conditions around May 27 or 28. If you would like to comment or have a tip, email the author at, [EMAIL PROTECTED] 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 bulletins is found at, http://www.arrl.org/w1aw/prop/. Sunspot numbers for May 12 through 18 were 110, 100, 91, 69, 70, 45 and 46 with a mean of 75.9. 10.7 cm flux was 117.4, 125.9, 99.5, 103, 99.1, 90 and 83.8, with a mean of 102.7. Estimated planetary A indices were 17, 27, 8, 105, 33, 19 and 13 with a mean of 31.7. Estimated mid-latitude A indices were 13, 21, 4, 44, 18, 10 and 6, with a mean of 16.6. /EX -- Archives http://www.mail-archive.com/dx-news@njdxa.org THE DXR is sponsored by the North Jersey DX Association. Please visit our website: http://www.njdxa.org/index.php scroll to bottom for subscribe/unsubscribe options --
