• 2 The ARRL Letter for October 12, 2017

    From mark lewis@1:3634/12.73 to all on Mon Oct 16 05:15:40 2017
    Tad Cook, K7RA, Seattle, reports: The NOAA Space Weather Prediction Center (SWPC) has issued a minor (G1) geomagnetic storm watch through October 13, due to the anticipated arrival of a recurrent, polar-connected, positive polarity coronal hole high-speed wind stream. A minor geomagnetic storm can cause weak power grid fluctuations and may have minor impact on satellite operations. The primary impact area is north of 60 geomagnetic latitude. A G1 storm can affect
    migratory animals, and aurora is commonly visible at high latitudes, NOAA said.

    No sunspots were visible on October 8 through 11, and the last new sunspot appeared on September 25. Average daily sunspot numbers for October 5-11 dropped from 32.6 for the previous 7 days to 8.4. Average daily solar flux declined from 87.9 to 76.8. Geomagnetic activity also dropped but is now increasing. The average daily planetary A index went from 16.3 to 8.9, and the average mid-latitude A index went from 12.7 to 8.

    Predicted solar flux is 70 on October 12-16; 72, 73, and 76 on October 17-19; 80 on October 20-31; 76 on November 1-5; 74 on November 6-14; 76 on November 15, and 80 on November 16-25.

    Predicted planetary A index is 30, 35, 25, 20, 10, 8, and 16 on October 12-18; 5 on October 19-23; 35 and 45 on October 24-25; 15 on October 26-27; 10 and 8 on October 28-29; 5 on October 30-31; 8 and 10 on November 1-2; 5 on November 3-5; 8, 25, 30, 36, 28, 16, and 8 on November 6-12; 5 on November 13-19, and 35, 45, 15, 15, 10, and 8 on November 20-25.

    Sunspot numbers for October 5-11 were 26, 22, 11, 0, 0, 0, and 0, with a mean of 8.4. The 10.7-centimeter flux was 84.7, 84.1, 79.6, 76.7, 72.3, 70.9, and 69.6, with a mean of 76.8. Estimated planetary A indices were 7, 9, 5, 4, 3, 4,
    and 30, with a mean of 8.9. Estimated mid-latitude A indices were 6, 6, 5, 3, 2, 13, and 21, with a mean of 8.

    Send me your reports and observations.

    ____________________________________________________________________________


    Just Ahead in Radiosport

    * October 14-25 -- Makrothen RTTY Contest
    * October 14-15 -- Oceania DX Contest (CW)
    * October 14-15 -- Scandinavian Activity Contest (SSB)
    * October 14-15 -- Pennsylvania QSO Party (CW, phone, digital)
    * October 14-15 -- Arizona QSO Party (CW, phone, digital)
    * October 14 -- FISTS Fall Unlimited Sprint (CW)
    * October 14-15 -- PODXS 070 Club 160-Meter Great Pumpkin Sprint
    * October 15 -- Asia-Pacific Fall Sprint (CW)
    * October 15 -- UBA ON Contest, 2 Meters (CW, phone)
    * October 16 -- Run for the Bacon QRP Contest (CW)
    * October 16-17 -- UHF Telephone Pioneers QSO Party (CW, phone, digital)
    * October 16-20 -- ARRL School Club Roundup (CW, phone)
    * October 18 -- RSGB 80-Meter Autumn Series (Digital)

    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

    * October 13-14 -- Florida State Convention, Melbourne, Florida
    * October 14 -- Pacific Northwest VHF Society Conference, Moses Lake,
    Washington
    * October 20-22 -- Pacific Division Convention, San Ramon, California
    * October 21 -- Wisconsin ARES/RACES Conference, Wisconsin Rapids,
    Wisconsin
    * October 22 -- Connecticut State Convention, Meriden, Connecticut
    * October 28 -- Arizona State Convention, Maricopa, Arizona
    * November 4-5 -- Georgia State Convention, Lawrenceville, Georgia
    * November 11 -- HamJam Convention, Alpharetta, Georgia
    * November 18-19 -- Indiana State Convention, Fort Wayne, Indiana
    * December 2 -- Arkansas DX Association's 50th Anniversary Convention,
    North Little Rock, Arkansas
    * December 8-9 -- West Central Florida Section Convention, Plant City,
    Florida

    Find conventions and hamfests in your area.

    ____________________________________________________________________________


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    )\/(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 doesn't look or sound remotely appetizing, but each to their own.
    ---
    * Origin: (1:3634/12.73)