Welcome to the “Propagation Forecast” update from Big Island ARRL News.

Views expressed in this Amateur/Ham Radio news summary are those of the reporters and correspondents.

Content provided by W1AW, Tad Cook (K7RA), and HQ ARRL, 225 Main Street, Newington, CT, 06111.

Accessed on 03 August 2019, 0530 UTC, Post 1063.

Source:  https://www.eham.net/articles/43541.

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Propagation Forecast Bulletin #31 de K7RA:

from W1AW Bulletin via the ARRL on August 2, 2019
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Propagation Forecast Bulletin #31 de K7RA:ZCZC AP31
Propagation Forecast Bulletin 31 ARLP031
>From Tad Cook, K7RA
Seattle, WA August 2, 2019
To all radio amateurs

ARLP031 Propagation de K7RA

No sunspots were observed over the past week, and solar flux remains flat, with average daily values declining from 67.3 to 67.

Average daily planetary A index went from 5.3 to 5, and middle latitude A index from 6.3 to 5.9.

Predicted solar flux for the next 45 days remains at 67, August 2 through September 15, every day.

Predicted planetary A index is 5 on August 2 and 3, then 8, 18, 15, 12 and 8 on August 4 to 8, 5 on August 9 to 16, 8 on August 17 and 18, 5 on August 19 to 26, then 8, 16, 8, 5, 8, 22 and 16 on August 27 through September 2, 5 on September 3 to 12, 8 on September 13 and 14, and 5 on August 15.

Geomagnetic activity forecast for the period August 2 to 28, 2019 from F. K. Janda, OK1HH.

“Geomagnetic field will be:
Quiet on August 2 and 3, 8, 12 to 15, 21 and 22
Quiet to unsettled on August 9, 16 and 17, 23, 25
Quiet to active on August 4 and 5, 7, (10 and 11,) 19 and 20, 24, 28
Unsettled to active on August 6, (18, 26 and 27)
Active to disturbed-None!

Solar wind will intensify on August (2 and 3,) 6-8, (9 and 14,) 27 and 28

Parenthesis means lower probability of activity enhancement.”

Spaceweather.com reminds us, “BE ALERT FOR PERSEID FIREBALLS: Earth is entering a stream of debris from giant Comet Swift-Tuttle, source of the annual Perseid meteor shower. Forecasters say the shower won’t peak until Aug. 12 and 13, but already NASA cameras are catching Perseid fireballs streaking over the USA. The Perseids produce more fireballs than any other annual shower–largely due to the size of the parent comet–so your chances of seeing one are good.”

Larry Koziel, K8MU sent this, about simulating the sun in a lab:


Larry and several others including Max White, M0VE reported recently about solar tsunamis:


George, N2CG in Saddle Brook, New Jersey wrote on July 29:

“So far this year’s Summer E’s Season daily NA to Europe 6m FT8 mode openings have mostly bypassed the FN20 and adjacent grids and favoring the NA South East (especially grids EL and EM) as seen daily on the DXMAPS Website.

Whatever EU openings I did manage to work so far were short lived lasting just a few minutes to 20 minutes at best.

However that changed on Sunday July 28, 2019 beginning around 2100 UTC in the NA South East Coast area and around 2200 UTC at my NJ QTH FN20wv when primarily Finland with a few Sweden and Norway stations came in with very good FT8 mode signals for over an hour. I managed to decode the following stations: OH2MA, OH2FQV, OH2FNR, OH3XF, LA2XPA and SM3CCM and I worked OG2M, OH3SR and OH3XA. This was my very first time working Finland on 6m and shortly after my QSO with OH3SR he verified our QSO on LoTW!

August will bring the prime 6m E’s Season to a close. However, maybe the 6m gods have another surprise opening before the end of the season.”

The latest from WX6SWW:


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.

Sunspot numbers for July 25 through 31, 2019 were 0, 0, 0, 0, 0, 0, and 0, with a mean of 0. 10.7 cm flux was 68.2, 67.6, 66.7, 67.1, 66.1, 66.2, and 66.9, with a mean of 67. Estimated planetary A indices were 3, 3, 4, 4, 5, 8, and 8 with a mean of 5. Middle latitude A index was 3, 4, 4, 7, 5, 8, and 10, with a mean of 5.9.

Source: W1AW Bulletin via the ARRL.

Hawaii Island Amateur/Ham Radio News:

Doug Wilson (KH7DQ) is offering one more free Technician License Class this year.  The class begins on Thursday, 17 October 2019, at the Keaau Community Center in Keaau, Hawaii Island.  For details, contact Doug at douscelle@aol.com

Please save the dates 24-25 August 2019 for the Hawaii QSO Party.  According to Alan (Ad6E/KH6TU), “The HQP will run from 0400Z 24 August to 0359Z 26 August.  Translated, that’s 6 pm Friday through 5:59 pm Sunday.  Work as many station on as many bands and modes as you can.  You can find complete rules here: http://www.hawaiiqsoparty.org/Rules/HQP/HQPRules-2019-A.html

“Grid Madness 2019”, the Hawaii Island-based VHF/UHF Simplex Contest, is set for Sunday, 15 September 2019, from 1300 to 1700 HST.  You can download the revised contest rules here: https://gridmadness.blogspot.com

For the latest Amateur/Ham Radio news and information, please check the blog sidebars and links.  These news feeds are updated daily and weekly.  Thanks for joining us today.

Aloha es 73 de Russell Roberts (KH6JRM)

Public Information Coordinator

Hawaii County, ARRL Pacific Section