Sunspots - More patience required . . .

[Edward A. Dauer]

This month’s Scientific American has an interesting one-page article on sunspots.  The 11-year cycle (the Schwabe cycle) is the one we tend to focus on, but there are 88 year cycles (the Gleissberg), occasional 200 year peaks (Suess-DeVries), and a 2,400 year (Hallstatt) cycle as well.  The longer cycles look like modulation envelopes with the shorter cycles constrained within them.

It seems from the graphic that we are only a few hundred years off the low of the 2,400 year cycle as well as suffering the bottom of the 11 year.  The last peak of the 2,400 year looks like it was at about the year 300 CE (a/k/a  AD).  So the next Hallstatt peak should be due in around 600 years, if I am interpolating from the graphics correctly.  I should probably replace all the coax by then.

The article is non-technical but visually striking.  I have no way to post it, and shouldn’t without SA’s permission anyway; but I can send a pdf copy by return e-mail attachment if anyone wants one.  Request off line please since this is sort of OT.

Ted, KN1CBR

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[Randy Moore]

The article is on-line:

https://www.scientificamerican.com/article/the-sunspot-cycle-is-more-intricate-than-previously-thought/

73,
Randy, KS4L

> On Jul 21, 2018, at 5:47 PM, Dauer, Edward <[hidden email]> wrote:
>
> This month’s Scientific American has an interesting one-page article on sunspots.  The 11-year cycle (the Schwabe cycle) is the one we tend to focus on, but there are 88 year cycles (the Gleissberg), occasional 200 year peaks (Suess-DeVries), and a 2,400 year (Hallstatt) cycle as well.  The longer cycles look like modulation envelopes with the shorter cycles constrained within them.
>
> It seems from the graphic that we are only a few hundred years off the low of the 2,400 year cycle as well as suffering the bottom of the 11 year.  The last peak of the 2,400 year looks like it was at about the year 300 CE (a/k/a  AD).  So the next Hallstatt peak should be due in around 600 years, if I am interpolating from the graphics correctly.  I should probably replace all the coax by then.
>
> The article is non-technical but visually striking.  I have no way to post it, and shouldn’t without SA’s permission anyway; but I can send a pdf copy by return e-mail attachment if anyone wants one.  Request off line please since this is sort of OT.
>
> Ted, KN1CBR
>
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[Leroy]

Those of us who study solar physics actually view the 11 years as half of
the 22 years it takes for the magnetic cycle to complete.
A peak or minimum is not a complete cycle.
73
Leroy AB7CE

-----Original Message-----
From: Dauer, Edward
Sent: Saturday, July 21, 2018 4:47 PM
To: [hidden email]
Subject: [Elecraft] Sunspots - More patience required . . .

This month’s Scientific American has an interesting one-page article on
sunspots.  The 11-year cycle (the Schwabe cycle) is the one we tend to focus
on, but there are 88 year cycles (the Gleissberg), occasional 200 year peaks
(Suess-DeVries), and a 2,400 year (Hallstatt) cycle as well.  The longer
cycles look like modulation envelopes with the shorter cycles constrained
within them.

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Post: mailto:[hidden email]

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Please help support this email list: http://www.qsl.net/donate.html
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