K7RA Solar Update

The following is quoted from ARRL News:

11/14/2019

Tad Cook, K7RA, Seattle, reports: With little to no solar activity, it’s amazing how many HF DX contacts are possible, even without taking advantage of so-called weak-signal modes such as FT8. Recent DXpeditions, such as the ones on Pitcairn Island and the Marquesas, had little trouble piling up the contacts, even on 10 meters. It helps that fall is upon us.

No sunspots over the past week, and average daily solar flux was about the same as last week, 70.3 compared to 70.4. Geomagnetic indices were still quiet, with average daily planetary A index at 4 (last week was 4.1) and middle latitude A index at 3 (compared to 2.7).

Predicted solar flux is 71 on November 14 – December 3; 70 on December 4 – 18; and 71 on December 19 – 28.

Predicted planetary A index is 5 on November 14 – 15; 12 and 8 on November 16 – 17; 5 on November 18 – 19; 18, 25, 18, 12, and 10 on November 20 – 24; 8 on November 25 – 26; 5 on November 27 – December 16; 15, 25, 18, 12, and 10 on December 17 – 21; 8 on December 22 – 23, and 5 on December 24 – 28.

Sunspot numbers for November 7 – 13 were 0, 0, 0, 0, 0, 0, and 0, with a mean of 0. The 10.7-centimeter flux was 69.8, 70.2, 69.6, 70.8, 69.5, 70.8, and 71.1, with a mean of 70.4. Estimated planetary A indices were 5, 3, 4, 3, 7, 4, and 2, with a mean of 4.1. Middle latitude A index was 3, 2, 3, 2, 7, 3, and 1, with a mean of 2.7.

A comprehensive K7RA Solar Update is posted Fridays on the ARRL website. For more information concerning radio propagation, visit the ARRL Technical Information Service, read “What the Numbers Mean…,” and check out K9LA’s Propagation Page.

A propagation bulletin archive is available. Monthly charts offer propagation projections between the US and a dozen DX locations.

Share your reports and observations.

 

Website: ARRL News

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