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   LS_ARRL      Bulletins from the ARRL      3,036 messages   

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   Message 1,814 of 3,036   
   mark lewis to all   
   ARLP022 Propagation de K7RA   
   29 May 15 14:16:00   
   
   POSTER NOTE: i'm using a new editor and formatting method. please let me know   
   if you have problems reading this posting...   
      
   ============================================================================   
      
   SB PROP @ ARL $ARLP022   
   ARLP022 Propagation de K7RA   
      
   ZCZC AP22   
   QST de W1AW   
   Propagation Forecast Bulletin 22  ARLP022   
   > From Tad Cook, K7RA   
   Seattle, WA  May 29, 2015   
   To all radio amateurs   
      
   SB PROP ARL ARLP022   
   ARLP022 Propagation de K7RA   
      
   This week the average daily sunspot number dropped 36 points to 56.1, and   
   average daily solar flux was down 25.7 points to 97.6. Geomagnetic numbers   
   indicated more stability than the previous week   
   (May 14-20) with average daily planetary A index declining from 10 to 4.4, and   
   mid-latitude A index down from 9.7 to 5.   
      
   The latest forecast from NOAA/USAF has solar flux at 90, 95, 100, 105 and 110   
   on May 29 through June 2, 115 on June 3-4, 125 and 120 on June 5-6, 115 on   
   June 7-10, 110 and 105 on June 11-12, 100 on June 13-14, 95 on June 15, 90 on   
   June 16-17, 95 on June 18-20, 100 on June 21-23 and 95, 90, 105, 110 and 115   
   on June 24-28, and 120 on June 29-30. Flux values then peak at only 125 on   
   July 1-2, before dropping back below 100 on July 12.   
      
   Planetary A index is predicted at 12 and 8 on May 29-30, then 5 on May 31   
   through June 6, then 10, 25 and 20 on June 7-9, 12, 8 and 5 on June 10-12,   
   then 8, 15 and 12 on June 13-15, 5 on June 16-23, then 8, 12 and 8 on June   
   24-26 and 5 on June 27-28.   
      
   F.K. Janda, OK1HH predicts the geomagnetic field will be quiet to unsettled   
   May 29, mostly quiet May 30, quiet to unsettled May 31, mostly quiet June 1,   
   active to disturbed June 2, quiet to active   
   June 3, mostly quiet June 4-5, quiet to unsettled June 6, quiet to active June   
   7-9, disturbed on June 10-11, mostly quite June 12, quiet June 13, quiet to   
   active June 14, active to disturbed June 15, quiet to active June 16 and quiet   
   on June 17.   
      
   Howard Lester, N7SO of Schuylerville, New York (FN33eb) wrote on May 28, "I   
   got on the radio last evening to see if there was any E2 on 6 meters. The band   
   was dead at 2330 UT, but I left it on 50.125 to monitor. At 0005 UT I heard a   
   K0 from Missouri calling CQ, coming in loud at S5, so I jumped off the sofa   
   and we had a nice little chat for a couple of minutes. After, I heard him work   
   a VA3. My antenna is a little triangular loop up 15 feet."   
      
   Last week David Moore sent a couple of links to articles about observations   
   from the NASA Solar Dynamics Observatory. See them here:   
      
   http://www.nasa.gov/image-feature/solar-dynamics-observatory-see   
   -cinco-de-mayo-solar-flare   
      
   http://www.nasa.gov/image-feature/coronal-loops-over-a-sunspot-group   
      
   On May 22, Bob Kupps, HS0ZIA of Chiang Mai, Thailand wrote, "Hi we had a very   
   nice 15m opening last night May 21 from around 1430-1530 UTC (2130-2230 local   
   time) right over the North Pole into almost all of North America from New   
   Brunswick to Arizona. Using a K3 at 100 W to a 5/5 Optibeam stack at 15 and 30   
   meters elevation. Fun!"   
      
   Check out Bob's antennas on his QRZ.com page. Quite a stack!   
      
   Don't forget the CQ World Wide WPX CW Contest this weekend. Look here for more   
   info: http://www.cqwpx.com/   
      
   If you would like to make a comment or have a tip for our readers, email the   
   author at, k7ra@arrl.net.   
      
   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://   
   rrl.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/.   
      
   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/1IBXtnG and   
   http://bit.ly/1KQGbRm .   
      
   Click on "Download this file" to download the archive and ignore the security   
   warning about the file format.   
      
   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 21 through 27 were 36, 81, 69, 74, 63, 46, and 24,   
   with a mean of 56.1. 10.7 cm flux was 101.8, 99.1, 97.7, 98.7, 96.5, 94.5, and   
   95.2, with a mean of 97.6. Estimated planetary A indices were 3, 3, 4, 5, 4,   
   6, and 6, with a mean of 4.4. Estimated mid-latitude A indices were 5, 4, 5,   
   6, 3, 6, and 6, with a mean of 5.   
      
   NNNN   
   /EX   
      
   )\/(ark   
      
   ... printk("What? oldfid != cii->c_fid. Call 911.\n");   
   ---   
    * Origin:  (1:3634/12.73)   

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