K7RA Solar Update

The following is quoted from ARRL News:

04/12/2019

Similar to the last reporting week in ARLP014, the first three days (Thursday through Saturday) had no visible sunspots, but sunspots returned on Sunday through Thursday. Average daily sunspot number declined from 9.4 to 6.9, but average daily solar flux rose from 69.5 to 75.4.

Geomagnetic indicators were slightly more active, with average daily planetary A index increasing from 8.4 to 10.6, and average middle latitude A index from 7.3 to 9.

Predicted solar flux for the next 45 days is 78 on April 12-17, 76 and 74 on April 18-19, 70 on April 20-22, 69 on April 23, 70 on April 24-28, 71 on April 29 through May 1, 72 on May 2-3, 77 on May 4-6, 74 on May 7-16, 70 on May 17-19, then 69, 68, 69 and 69 on May 20-23, 70 on May 24-25 and 71 on May 26.

Predicted planetary A index is 12 on April 12-13, 5 on April 14-23, then 10, 8, 5, 10, 8, and 5 on April 24-29, 10 on April 30 through May 2, 7 on May 3, 5 on May 4-20, then 10, 8, 5, 10, 8 and 5 on May 21-26.

On April 7 sunspot group 2738 appeared. Currently (Thursday, April 11) you can see it as the bright spot on the STEREO image at: https://stereo.gsfc.nasa.gov/Of course, the bright spot will move from left to right over time, until it disappears off the right side.

Geomagnetic activity forecast for the period April 12 until May 8, 2019 from F.K. Janda, OK1HH.
Geomagnetic field will be:
Quiet on April 14, 17-19
Quiet to unsettled on April 16, 20-23, 26, 29, May 2-4
Quiet to active on April (15,) 28, May 1
Unsettled to active on April (24-25, 27,) 30, May 5-8
Active to disturbed April (12-13)

Solar wind will intensify on April 12-13, 15-16, (19-23,) 24-25, (26-30,) May (1,) 2-3, (5, 8)

Parenthesis means lower probability of activity enhancement.

Website: ARRL News

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