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.

____________________________________________________________________________


ARRL -- Your One-Stop Resource for Amateur Radio News and Information.

 *  Join or Renew Today! ARRL membership includes QST, Amateur Radio's most
    popular and informative journal, delivered to your mailbox each month.
 *  Listen to ARRL Audio News, available every Friday.

Subscribe to...

 *  NCJ -- National Contest Journal. Published bimonthly, features articles
    by top contesters, letters, hints, statistics, scores, NA Sprint, and
    QSO Parties.
 *  QEX -- A Forum for Communications Experimenters. Published bi-monthly,
    features technical articles, construction projects, columns, and other
    items of interest to radio amateurs and communications professionals.

Free of charge to ARRL members...

 *  Subscribe to the ARES E-Letter (monthly public service and emergency
    communications news), the ARRL Contest Update (bi-weekly contest
    newsletter), Division and Section news alerts -- and much more!

Find ARRL on Facebook! Follow us on Twitter, Snapchat @ARRLHQ, and Instagram!

____________________________________________________________________________


The ARRL Letter is published Thursdays, 48 times each year. ARRL members may
subscribe at no cost or unsubscribe by editing their Member Data Page as
described at http://www.arrl.org/arrlletter/.

Copyright (C) 2017 American Radio Relay League, Incorporated. Use and
distribution of this publication, or any portion thereof, is permitted for
non-commercial or educational purposes, with attribution. All other purposes
require written permission.

www.arrl.org

)\/(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)