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  • 2 The ARRL Letter for February 15, 2018

    From mark lewis@1:3634/12.73 to all on Fri Feb 16 09:00:52 2018
    Tad Cook, K7RA, Seattle, reports: We should be seeing some enhanced propagation
    due to a current modest rise in solar activity, which may increase further over
    the next few days.

    Solar activity increased over the February 8-14 reporting week. Average daily sunspot number rose from 10.3 to 24, while average daily solar flux increased from 72.5 to 77.4. Geomagnetic indicators were quiet, with average planetary A index changing from 4.4 to 4.1, and average mid-latitude A index going from 3.6
    to 3.

    Predicted solar flux is 75, 74, 73, and 70; on February 15-18; 69 on February 19-28; 72 on March 1; 75 on March 2-3; 78 on March 4-13; 76 on March 14-15; 72 on March 16; 70 on March 17-21; 69 on March 22-27; 72 on March 28; 75 on March 29-30, and 78 on March 31.

    Predicted planetary A index is 28, 20, and 15 on February 15-17; 10 on February
    18-19; 8 on February 20-21; 5 on February 22-March 3; 8 on March 4; 5 on March 5-13; 8, 15, 12, 10, 5, 8, 10, and 8 on March 14-21; 5 on March 22-30, and 8 on
    March 31.

    February 4 was the last day that a new sunspot appeared. Before that, February 2 showed a new spot.

    Sunspot numbers for February 8-14 were 22, 23, 35, 24, 26, 20, and 18, with a mean of 24. The 10.7-centimeter flux was 77.5, 78.1, 78.2, 78.2, 78.6, 75.9, and 75.3, with a mean of 77.4. Estimated planetary A indices were 4, 5, 7, 3, 4, 3, and 3, with a mean of 4.1. Estimated mid-latitude A indices were 2, 2, 7,
    2, 3, 3, and 2, with a mean of 3.

    Send me your reports and observations.

    ____________________________________________________________________________


    Just Ahead in Radiosport

    * February 17 -- SARL Youth Day Sprint
    * February 17 -- Feld Hell Sprint
    * February 17-18 -- ARRL International DX Contest (CW)
    * February 17-18 -- Russian PSK WW Contest
    * February 17-18 -- AWA Amplitude Modulation QSO Party
    * February 18-21 -- Classic Exchange (Phone)
    * February 19 -- Run for the Bacon QRP Contest (CW)
    * February 21 -- AGCW Semi-Automatic Key Evening (CW)
    * February 22 -- RSGB 80-Meter Club Championship (CW)

    See the ARRL Contest Calendar for more information. For in-depth reporting on Amateur Radio contesting, subscribe to The ARRL Contest Update via your ARRL member profile e-mail preferences.

    ____________________________________________________________________________


    Upcoming ARRL Section, State, and Division Conventions

    * February 16-17 -- Southwestern Division Convention, Yuma, Arizona
    * February 24 -- TECHCON Conference, Winter Haven, Florida
    * February 24 -- New Mexico TechFest, Albuquerque, New Mexico
    * February 24 -- Vermont State Convention, S. Burlington, Vermont
    * March 2-3 -- Alabama State Convention, Irondale, Alabama
    * March 3 -- Arkansas State Convention, Russellville, Arkansas
    * March 9-10 -- Louisiana State Convention, Rayne, Louisiana
    * March 9-10 -- North Carolina Section Convention, Concord, North Carolina
    * March 10 -- Nebraska State Convention, Lincoln, Nebraska
    * March 16-17 -- South Texas Section Convention, Rosenberg, Texas
    * March 17 -- Southern Florida Section Convention, Stuart, Florida
    * March 17 -- West Texas Section Convention, Midland, Texas
    * March 24 -- Utah Digital Communications Conference, Sandy, Utah
    * March 24 -- MicroHAMS Digital Conference, Redmond, Washington
    * March 24 -- West Virginia Section Convention, Charleston, West Virginia
    * March 30-31 -- Maine State Convention, Lewiston, Maine
    * March 31 -- North Carolina State Convention, Raleigh, North Carolina

    Find conventions and hamfests in your area.

    ____________________________________________________________________________


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    ---
    * Origin: (1:3634/12.73)