SB PROP @ ARL $ARLP032
ARLP032 Propagation de K7RA

ZCZC AP32
QST de W1AW
Propagation Forecast Bulletin 32 ARLP032

From Tad Cook, K7RA

Seattle, WA August 15, 2017
To all radio amateurs

SB PROP ARL ARLP032
ARLP032 Propagation de K7RA

Sorry for the long delay in getting this bulletin out, which normally occurs on
Friday, but is now being released on the following Tuesday. This was the result
of an automatic operating system update gone bad, which has me now actively considering open source alternatives. It still isn't fixed.

Average daily sunspot numbers for the recent reporting week (August 3-9) rose 7.1 points to 12.1, and average daily solar flux rose from 71 to 73.2.

Average daily planetary A index went from 5 to 11.3, and mid latitude A index rose from 6 to 10.9.

Predicted solar flux for the near term is 74 on August 15-21, 72 on August 22, 68 on August 23-28, 70 on August 29, and 72 on August 30 through September 8.

Predicted planetary A index is 5, 16, 26 and 20 on August 15-18, then 16, 14, 12, 10 and 6 on August 19-23, 5 on August 24-29, then 12, 24, 18 and 14 on August 30 through September 2, and 5 on September 3-8.



W7WKR sent this:

http://nyti.ms/2f4mpNH



Max White sent this:

http://bit.ly/2uUxsNm



Ward Silver, N0AX and others reminded me that the upcoming HamSCI experiment this month in conjunction with the solar eclipse is not actually sponsored by the ARRL, but is a creation of HamSCI, Ham Radio Science Investigation. Check them out at, http://www.hamsci.org/ .



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 August 3 to 9, 2017 were 13, 13, 13, 13, 11, 11, and 11, with a mean of 5. 10.7 cm flux was 75.1, 74.1, 74.1, 73.5, 72.7, 71.1, and 71.5, with a mean of 71. Estimated planetary A indices were 12, 23, 16, 13, 5, 5, and 5, with a mean of 5. Estimated mid-latitude A indices were 11, 19, 17, 13, 6, 5, and 5, with a mean of 6.

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...
... What do we learn from history? That we learn nothing from history.
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