3-month summer comparisons 2017-2019

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Carbon60
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3-month summer comparisons 2017-2019

Post by Carbon60 »

I thought it would be interesting to compare the frequency and intensity of geomagnetic storms over the past three years, as indicated on my home brew magnetometer, as we continue to progress through solar minimum. I selected May, June and July for each of the years as they fall between the equinoxes, which are known to be particularly sensitive to the influence of the solar wind.

The 'rate of change' of magnetic declination is plotted here as a function of time over the three months for 2017, 2018 and 2019
20190803_May_June_July.jpg
20190803_May_June_July.jpg (347.26 KiB) Viewed 2631 times
The data clearly show a much reduced level of geomagnetic activity this year compared with the last two years, as we would expect, given the declining population of active regions. There are still coronal holes opening up, releasing fast flowing solar wind and creating aurora, but even these seem to be less frequent and less geoeffective this year, as the data show.

Further confirmation (as if any were needed) that we're in midst of solar minimum!

Thanks for looking.

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: 3-month summer comparisons 2017-2019

Post by george9 »

Awesome. Thanks for showing this. George


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Re: 3-month summer comparisons 2017-2019

Post by marktownley »

Very interesting Stu! I can see i'm going to need a good coronal hole in October for any real chance of aurora. Conrats on the spaceweather feature too! http://spaceweather.com/archive.php?vie ... &year=2019


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Re: 3-month summer comparisons 2017-2019

Post by Montana »

Wow!! what good data, it really is remarkably quiet this year!

:bow
Alexandra


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Re: 3-month summer comparisons 2017-2019

Post by Montana »

Front page of Spaceweather too :hamster: :hamster: :hamster:
Alexandra


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Re: 3-month summer comparisons 2017-2019

Post by Carbon60 »

Many thanks, George, Mark and Alexandra.

Now we all just want to see the reverse trend, building back up to solar max ;)

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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