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Top Google hit, apparently from 1996 http://www.arrl.org/here-comes-the-sun

Some other sites http://www.solarham.net/index.htm https://hamradioschool.com/sunspots-and-propagation/

TLDR: Since we're at the minimum now, if you want to chase DX, stick to the 30, 40, 80, and 160 meter bands at night. You might get something on 15, 17, or 20 meters. It will be a few years before the higher bands open up again.

There's a nice chart of when you can get DX in each band in this article:

https://www.eham.net/newham/bands

Thanks for link, very informative

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