Introduction
The National Oceanic and Atmospheric Administration Space Weather Prediction Center forecasts a solar maximum between 105 and 125, with the peak occurring between November 2024 and March 2026. There is broad consensus that solar minimum is ongoing in 2020 — or may have already occurred — and that Cycle 25 will have no major change in the level of solar activity compared to Cycle 24.
You can get custom professional-grade high-frequency (3-30 MHz) propagation predictions online.
Where can I find solar data?
Mark Downing, WM7D, has graphs of solar data on his web site.
Understanding Monthly Propagation Charts
"Those New QST Propagation Charts," by Jerry Hall, K1TD
"Interpreting QST's New Propagation Charts for Low Power and Low Antennas," by Jerry Hall, K1TD
NOTE: Due to disruptions caused by the impact of the COVID-19 pandemic on ARRL Headquarters operations, the monthly charts will not be updated until later this year. Our apologies for the inconvenience.
May 2020
April 2020
March 2020
February 2020
January 2020
December 2019
November 2019
October 2019
September 2019
August 2019
July 2019
June 2019
May 2019
April 2019
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