From the ARRL Letter for January 24, 2019

Tad Cook, K7RA, Seattle, reports: Sunspot group 2733 appeared this week on Tuesday, with a sunspot number of 18, and on Wednesday it increased in size with a sunspot number of 19. Sunspot group 2733 is a remnant of old Solar Cycle 24. Average daily sunspot numbers increased from 0 to 5.3 over the reporting week. Average daily solar flux edged up slightly from 69.4 to 69.8. The average daily planetary A index rose from 4.9 to 5.9, while the mid-latitude A index was unchanged at 4.

The predicted solar flux is 72 on January 24 – 27; 70 on January 28 – 30; 71 on January 31 – February 1; 70 on February 2 – 4; 69 on February 5 – 16; 71 on February 17 – 28; 70 on March 1 – 3, and 69 on March 4 – 9.

The planetary A index is predicted at 24, 18, and 10 on January 24 – 26; 5 on January 27 – 31; 15, 12, and 8 on February 1 – 3; 5 on February 4 – 18; then 18, 25, 18, and 10 on February 19 – 22; 5 on February 23 – 26; 10 and 15 on February 27 – 28; 12 and 8 on March 1 – 2, and 5 on March 3 – 9.

Sunspot numbers for January 17 – 23, 2019 were 0, 0, 0, 0, 0, 18, and 19, with a mean of 5.3. The 10.7-centimeter flux was 68.6, 68.8, 69.7, 69.2, 69.9, 70.7, and 71.5, with a mean of 69.8. Estimated planetary A indices were 7, 6, 4, 4, 4, 3, and 13, with a mean of 5.9. Estimated mid-latitude A indices were 5, 5, 2, 2, 2, 2, and 10, with a mean of 4.Share your reports and observations.

The K7RA Solar Update