ZCZC AP01
QST de W1AW
Propagation Forecast Bulletin 1 ARLP001
From Tad Cook, K7RA
Seattle, WA January 3, 2025
To all radio amateurs
SB PROP ARL ARLP001
ARLP001 Propagation de K7RA
Currently a geomagnetic storm is raging. On January 1-2, Alaska's college A ind
Predicted planetary A index is 12 on January 3, then 18, 18, 12, 10 and 8 on Ja
Predicted solar flux is 215 on January 3-4, then 205, 210, 205 and 205 on Janua
Weekly Commentary on the Sun, the Magnetosphere, and the Earth's Ionosphere - J
"Considering the high solar flare activity, there was a relatively high probabi
"But currents of enhanced solar wind avoided the Earth and therefore it was sur
"Strong solar flares in the last two days of December were followed by CMEs tha
"Particles ejected by the second of the major eruptions hit the Earth more effe
"At first approximation, the unexpected development of ionospheric shortwave pr
"The most active regions on the Sun now fall behind the western limb of the sol
An article from "yourweather.co.uk" regarding the solar max:
https://bit.ly/41ZnwUq
Latest video from Dr. Tamitha Skov, WX6SWW (Space Weather Woman):
https://youtu.be/k3gxVE74Xa0
For more information concerning shortwave radio propagation, see www.arrl.org/p
An archive of past propagation bulletins are at: www.arrl.org/w1aw-bulletins-ar
Also, check this: "Understanding Solar Indices" from September 2002 QST.
https://bit.ly/3Rc8Njt
Instructions for starting or ending email subscriptions to ARRL bulletins are a
Sunspot numbers for December 26, 2024 through January 1, 2025 were 211, 233, 21 NNNN
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