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SB PROP @ ARL $ARLP044

ARLP044 Propagation Forecast

ZCZC AP44

QST de W1AW

Propagation Forecast Bulletin 44 ARLP044

From ARRL Headquarters

Newington, CT October 30, 2026

To all radio amateurs

SB PROP ARL ARLP044

ARLP044 The ARRL Solar Report

Solar activity is expected to be at very low levels in the coming

days, according to NOAA¡s Space Weather Prediction Center (SWPC), as

one sunspot region (4561) rotated out of view and a second (4562) was

quiet and in decay. No Earth-directed coronal mass ejections (CMEs)

were observed. The geomagnetic field has been quiet, although an

enhancement is expected late on October 30, with a minor geomagnetic

storm possible on the 31st, as a result of a recurrent equatorial

positive-polarity coronal hole high-speed stream (CH HSS).

The Australian Space Weather Forecasting Centre predicts normal to

fair HF propagation conditions for the middle latitudes, with

generally quiet conditions on the Sun.

The W3LPL Propagation Forecast from the Daily DX is predicting mostly

normal propagation on the 15- through 80-meter bands -- good DX

during the day on 15, 17, and 20 meters; and at night on 30, 40, 60,

and 80 meters -- with generally poor DX on 12 and 10 meters as the

maximum usable frequency (MUF) dips below 24 MHz due to low sunspot

activity.

Weekly Commentary on the Sun, the Magnetosphere, and the Earth's

Ionosphere, October 29, 2026, by F. K. Janda, OK1HH:

Solar activity is gradually declining in the second half of October,

as expected. The decline will continue into early November, with

Class C solar flares still occurring infrequently. Class M flares may

continue to occur on rare occasions.

The next increase in solar activity is not expected until the second

half of November. In the meantime, there will continue to be isolated

and generally brief spikes in geomagnetic activity, which will be

difficult to predict with precision.

The Predicted Planetary A Index for October 30 to November 5 is 5,

30, 20, 10, 5, 5, and 10, with a mean of 12.1. The Predicted Planetary

K Index is 2, 5, 4, 3, 2, 2, and 3, with a mean of 3.0. 10.7

centimeter flux is 84, 84, 84, 82, 82, 82, and 82, with a mean of

82.9.

For more information concerning shortwave radio propagation, see www.arrl.org/propagation and the ARRL Technical Information Service web page
at www.arrl.org/propagation-of-rf-signals. For an explanation of numbers used in this bulletin, see www.arrl.org/the-sun-the-earth-the-ionosphere. Information and tutorials on propagation can be found at http://k9la.us?utm_source?RL&utm_campaign?8767a75c-EMAIL_CAMPAIGN_2026_09_25_02_16_COPY_01&utm_medium?ail&utm_term?-34937f7b69-443795558.


Also, check this: "Understanding Solar Indices" from September 2002 QST. https://bit.ly/3Rc8Njt?utm_source?RL&utm_campaign?8767a75c-EMAIL_CAMPAIGN_2026_09_25_02_16_COPY_01&utm_medium?ail&utm_term?-34937f7b69-443795558


NNNN

/EX

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