Predicted solar flux for the next 45 days is 69 on April 26-30, then 70 on May 1-2, 72 on May 3, 76 on May 4-5, 77 on May 6, 78 on May 7-16, 76 and 72 on May 17-18, 69 on May 19-29, then 72, 76, 76 and 77 on May 30 through June 2, and 78 on June 3-9.
Predicted planetary A index is 10, 5 and 10 on April 26-28, 5 on April 29 through May 1, then 15, 10, 5, 10, 12 and 14 on May 2-7, 8 on May 8-10, 5 on May 11-19, 8 on May 20-22, then 5, 12, 8 and 5 on May 23-26, then 10, 14, 12, 8 and 5 on May 27-31, then 10, 12 and 14 on June 1-3, 8 on June 4-6, and 5 on June 7-9.
Geomagnetic activity forecast for the period April 26-May 20, 2019 from F.K. Janda, OK1HH.
Geomagnetic field will be:
Quiet on April 28, May 11, 13-14, 16, 18-19
Quiet to unsettled on April 26, May 3-4, 8-9, 12, 15, 17
Quiet to active on April 30, May 1-2, 10, 20
Unsettled to active on April 27, 29, May 5-7
Solar wind will intensify on May 3-5, 9-13, 15, (20).
Parenthesis means lower probability of activity enhancement.
On April 22, Tom Scott, N5GIT, in San Antonio wrote: “Just bagged my first 2-meter SSB contact with Florida! I was only running 100 W to a K5VH 3-ring halo antenna at 28 feet tied to a second story balcony.”
Here is Dr. Skov’s latest video: https://youtu.be/W9Fp-O3Ddlo
If you would like to make a comment or have a tip for our readers, email the author at, k7ra@arrl.net.
For more information concerning radio propagation, see the ARRL Technical Information Service at http://arrl.org/propagation-of-rf-signals. For an explanation of numbers used in this bulletin, see http://arrl.org/the-sun-the-earth-the-ionosphere.
An archive of past propagation bulletins is at http://arrl.org/w1aw-bulletins-archive-propagation. More good information and tutorials on propagation are at http://k9la.us/.
Monthly propagation charts between four USA regions and twelve overseas locations are at http://arrl.org/propagation.
Instructions for starting or ending email distribution of ARRL bulletins are at http://arrl.org/bulletins.
Sunspot numbers for April 18 through 24, 2019 were 23, 23, 11, 0, 0, 0, and 0, with a mean of 8.1. 10.7 cm flux was 74.6, 72.7, 69.9, 69.3, 69.4, 68.8, and 69.3, with a mean of 70.6. Estimated planetary A indices were 2, 4, 4, 4, 4, 8, and 7, with a mean of 4.7. Middle latitude A index was 2, 4, 4, 4, 4, 8, and 6, with a mean of 4.6.
