ARLP021 Propagation de K7RA
Here's the latest Amateur Radio Propagation forecast from Tad Cook (K7RA).
Views expressed in this Amateur/Ham Radio propagation update are those of the reporters and correspondents. Accessed on 10 June 2024, 1936 UTC.
Content provided by The ARRL. Copyright ARRL.
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Russ Roberts (KH6JRM), Public Information Officer, Hawaii County (ARRL Pacific Section).
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SB PROP @ ARL $ARLP021
ARLP021 Propagation de K7RA
ZCZC AP21
QST de W1AW
Propagation Forecast Bulletin 21 ARLP021
From Tad Cook, K7RA
Seattle, WA June 7, 2024
To all radio amateurs
SB PROP ARL ARLP021
ARLP021 Propagation de K7RA
This reporting week (May 30 to June 5) our Sun was active, with nine new sunspot groups.
One emerged on May 30, another on May 31, two more on June 1, another on June 2, three more on June 3, and one more on June 4.
Average daily sunspot number rose from 124.6 to 183.4, and average daily solar flux from 164.8 to 184.8.
Predicted solar flux is 190 on June 7-9, 170 on June 10-19, 180 on June 20, 190 on June 21-23, 195 on June 24 and 25, 200 on June 26, 205 on June 27-29, 180 on June 30, then 185, 185 and 180 on July 1-3, 175 on July 4-7, 180 and 175 on July 8-9, and 170 on July 10-16.
Predicted planetary A index is 5, 10 and 8 on June 7-9, 5 on June 10-18, 8 on June 19-20, then 5, 8 and 8 on June 21-23, and 5 on June 24 to July 6, then 8, 10, and 8 on July 7-9, and 5 on July 10-15.
Weekly Commentary on the Sun, the agnetosphere, and the Earth's Ionosphere - June 6, 2024 from F.K. Janda, OK1HH:
"The rise in solar activity is confirmed by the average sunspot number for May, 171.7, which is the highest in 22 years. Plugging this into the formula for calculating the smoothed 12-month average gives 127.8 for last November. As a consequence of the high solar activity, including CME flares, there were a large number of geomagnetic storms in May. The largest of these occurred on 10-11 May, while accompanied by auroras, easily observable even at
mid-latitudes.
"Shortwave conditions were above average on only six days out of the entire month of May, and mostly poor on half of the days in response to a total of seven one- to three-day disturbed intervals. The worst day was May 11. In addition, a summertime sporadic-E layer contributed to the erratic development, especially in the mid-latitudes of the Northern Hemisphere.
"While the two large sunspot groups, AR3663 and AR3664 (AR3691 and AR3697 in June), continue to have a magnetic configuration conducive to the production of large flares, there are fewer of them than in May, and the evolution of propagation conditions is therefore more regular, and the occurrence of above-average days is more frequent.
The number of sunspot groups increased from seven to twelve during the first six days of June.
"Although the sunspot number and the solar flux (which is the power flux of solar radio noise at the 10.7 cm wavelength) may still be increasing, a repeat of the large disturbances experienced in May is unlikely in the near term."
On June 3, Glenn Packard, K4ZOT, wrote:
"I just received your Propagation Report and was reading it when a near miracle happened. Hawaii 6M FT8 station (KH6HI) came in on my JTAlert program here - South of Atlanta, GA - 06/3. Also, worked several west Coast stations (VE7DX, KF7PG, etc.) as well in rapid succession before the band changed. Very rare indeed to even hear a HI station in Atlanta."
An article about Astrophotographer Andrew McCarthy:
https://mymodernmet.com/
The latest report from Dr. Tamitha Skov, WX6SWW:
Send your tips, reports, observations, questions and comments to k7ra@arrl.net. When reporting observations, don't forget to tell us which mode you were operating.
For more information concerning shortwave radio propagation, see http://www.arrl.org/
An archive of past propagation bulletins is at http://arrl.org/w1aw-
Also, check this QST article about Solar Indices:
Instructions for starting or ending email distribution of ARRL bulletins are at http://arrl.org/bulletins.
Sunspot numbers for May 30 through June 5, 2024 were 144, 135, 194, 186, 208, 224, and 193, with a mean of 183.4. 10.7 cm flux was 172.9, 179.4, 188, 179.8, 186, 192.3, and 195.3, with a mean of 184.8. Estimated planetary A indices were 8, 12, 5, 5, 11, 8, and 7, with a mean of 8. Middle latitude A index was 10, 14, 6, 5, 13, 8, and 10, with a mean of 9.4.
NNNN
/EX
ARRL The National Association for Amateur Radio®
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