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Questions tagged [sunspots]

Questions about sunspots, how they are measured, what those measurements mean and how they affect amateur radio activity.

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16 votes
7 answers
14k views

What is the cause of this unusually long period of terrible HF band conditions?

I've been a ham for over 40 years, but never has there been such a prolonged period of such poor propagation. This has been especially the case over the past six months or so, and they continue to ...
Mike Waters's user avatar
  • 8,174
5 votes
2 answers
7k views

Where year 2016 falls in the sun spot cycle for HF propagation?

Are we now at the good or bad portion of the 11 years cycle? What effect are we seeing now? How large (strong/deep) is the effect during the peak and bottom of cycle? What will change in coming years?
EEd's user avatar
  • 552
4 votes
3 answers
8k views

How and why sunspots affect propagation in HF bands?

How and why do sunspots affect propagation in HF bands?
Timtech's user avatar
  • 2,356
3 votes
1 answer
2k views

Where does the year 2019 fall in the sunspot cycle for HF propagation?

I am reposting this question about the year 2016 here. This is 2019. Are we now at the good or bad portion of the 11 years cycle? What effect are we seeing now? How large (strong/deep) is the effect ...
Mike Waters's user avatar
  • 8,174