Tad Cook, K7RA, Seattle, reports:

Still no sunspots to report. Spaceweather.com reported on May 20 that the current stretch of days with no sunspots has now reached 18, and with that, the 2020 percentage of days with no sunspots has risen to 77% — equal to 2019. Until May 15, that statistic stood at 76%.

Average daily solar flux for the week rose to 69 from last week’s average of 68.5. The average planetary A index declined from 4.1 to 3.7, while the average mid-latitude A index shifted from 4.7 to 4.

Predicted solar flux for the next 45 days is 70 — every day from May 21 through July 4.

Predicted planetary A index is 5 on May 21 – June 14; 8 on June 15 – 16, and 5 on June 17 – July 4.

In this Friday’s bulletin, look for multiple reports heralding the start of E-skip season.

Sunspot numbers for May 14 – 20 were 0, 0, 0, 0, 0, 0, and 0, with a mean of 0. The 10.7-centimeter flux was 67.6, 67.8, 69.4, 69.6, 70.2, 68.7, and 69.6, with a mean of 69. Estimated planetary A indices were 3, 4, 4, 3, 4, 5, and 3, with a mean of 3.7. Middle latitude A index was 3, 4, 4, 3, 5, 6, and 3, with a mean of 4.

ARRL News Letter on May 21, 2020