• ARLP044 Propagation de K7RA

    From mark lewis@1:3634/12.73 to all on Sat Nov 4 14:24:06 2017
    SB PROP @ ARL $ARLP044
    ARLP044 Propagation de K7RA

    ZCZC AP44
    QST de W1AW
    Propagation Forecast Bulletin 44 ARLP044
    From Tad Cook, K7RA
    Seattle, WA November 3, 2017
    To all radio amateurs

    SB PROP ARL ARLP044
    ARLP044 Propagation de K7RA

    Average daily sunspot number increased from 13.4 to 17.7 for the October 26 to November 1 period, compared to the previous seven days. The main reason for the
    difference was that the previous seven days started out with two days with no sunspots, and the latter period ended with one day of 0 sunspots, on November 1.

    Predicted solar flux is 74 on November 3-4, 73 on November 5-9, 71 on November 10, 70 on November 11-13, 71 on November 14, 72 on November 15-16, 73 and 74 on
    November 17-18, 75 on November 19-28,
    72 on November 29-30, 70 on December 1-10, 71 on December 11, 72 on December 12-13, then 73 and 74 on December 14-15 and 75 on December 16-17.

    Predicted planetary A index is 8 on November 3, 5 on November 4-5, then 8, 16, 25, 30, 28, 25 and 8 on November 6-12, then 5 on November 13-14, then 12, 10 and 8 on November 15-17, 5 on November 18-19, then 20 on November 20-22, 5 on November 23-27, 8 on November 28, 15 on November 29-30, then 10, 8, 5, 25 and 28 on December 1-5, then 35, 25, 20 and 8 on December 6-9, 5 on December 10-11,
    then 12, 10 and 8 on December 12-14, then 5 on December 15-16 and 18 on December 17.



    Geomagnetic activity forecast for the period November 3-29, 2017 from F.K. Janda, OK1HH:

    "Geomagnetic field will be:
    Quiet on November 4, 6, 12-13, 23-27
    Mostly quiet on November 3, 5, 16-19
    Quiet to unsettled on November 15, 20
    Quiet to active on November 7, 11, 14, 22
    Active to disturbed on November 8-10, (21)

    "Amplifications of the solar wind from coronal holes are expected November (3,)
    9-14, 20-21

    "Remarks:
    - Parenthesis means lower probability of activity enhancement.
    - Current forecasts remain less reliable."



    Lately, it seems we cannot get enough of Hisako Koyama. Yet another story appeared this week at Syfy.com:

    http://bit.ly/2xT7WJj

    Don't miss the links at the end of the article showing detailed instructions for sketching sunspots.



    Dr. Tamitha Skov on October 31 on You Tube:

    https://www.youtube.com/watch?v=jrUxUXTaL7A



    The CW portion of ARRL November Sweepstakes is this weekend. The complete package for this contest is here:

    http://bit.ly/2iopVkn



    Jon Jones, N0JK wrote:

    "Jeff, N8II's comments re 10 meter openings in the ARLP043 Propagation bulletin
    inspired me to check 10 Meters in the CQ WW SSB contest last weekend.

    "Saturday afternoon October 28 was not good in KS, with only a few very weak LU
    and PYs coming through.

    "Sunday Oct. 29 was much better on 10 Meters.

    I set up fixed mobile with 100 W and a full size 1/4 wave whip at 1905z on 10 meters in eastern Kansas on a hilltop. Nice sunny afternoon, temp 65 degrees. FM5BH went into the log at 1909z followed by a very loud HI3T at 1911z, then CU4DX on 28.325 MHz for the only European at 1912z. Over the next hour and half
    I logged around 40 more stations, a mixture of Caribbean, Central America and CE, CX, LU and PY. DX included FY5KE, PZ5K, OA4SS, HC2G and HP1XT. Some fairly short F2 with CO8RH at 1952z and Stan, K5GO at ZF9CW in the log at 2002z. Not bad for a solar flux of 75."



    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 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/.

    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 October 26 through November 1, 2017 were 23, 23, 22, 23, 22, 11, and 0, with a mean of 17.7. 10.7 cm flux was 77.3, 76, 75.4, 75.3, 75.6, 75.4, and 72.6, with a mean of 75.4. Estimated planetary A indices were 20, 5, 6, 4, 3, 3, and 4, with a mean of 6.4. Estimated mid-latitude A indices were 16, 4, 5, 3, 1, 2, and 2, with a mean of 4.7.

    NNNN
    /EX

    )\/(ark

    Always Mount a Scratch Monkey
    Do you manage your own servers? If you are not running an IDS/IPS yer doin' it wrong...
    ... It seems silly now, but your country was founded as a tax protest.
    ---
    * Origin: (1:3634/12.73)