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2017 Annual Geomagnetic Data- Updated

Posted: Tue Jan 09, 2018 10:40 pm
by Carbon60
Hi all,

I've pulled together all 193,000 data points collected over the year showing that even with a declining solar cycle there are still plenty of opportunities to view the aurora, primarily due to fast flowing solar wind arising from large coronal holes.
2017 Geomagnetic.jpg
2017 Geomagnetic.jpg (149.94 KiB) Viewed 4782 times
We'll see how 2018 pans out.

Thanks for looking.

Stu.

Re: 2017 Annual Geomagnetic Data

Posted: Wed Jan 10, 2018 11:31 am
by Montana
That looks a busy year but I would say that December looks a lot quieter than last January or February :( but then again it was quiet in June July too, so is that a decline in between the equinox activity?

Alexandra

Re: 2017 Annual Geomagnetic Data

Posted: Wed Jan 10, 2018 9:25 pm
by Carbon60
Hi Alexandra,

Some further analysis confirms what you were thinking. A dip between equinoxes. It will be interesting to see if this repeats annually.
2017 Geomagnetic Events Count.jpg
2017 Geomagnetic Events Count.jpg (69.68 KiB) Viewed 4762 times
Stu.

Re: 2017 Annual Geomagnetic Data

Posted: Thu Jan 11, 2018 6:12 am
by marktownley
Interesting data there Stu, thanks.

Re: 2017 Annual Geomagnetic Data

Posted: Mon Jan 15, 2018 6:50 am
by Carbon60
Thanks, Mark.

Stu.

Re: 2017 Annual Geomagnetic Data

Posted: Mon Jan 15, 2018 7:44 pm
by p_zetner
Beautiful work, Stu!

Cheers.
Peter.

Re: 2017 Annual Geomagnetic Data

Posted: Sat Jan 20, 2018 7:49 am
by Carbon60
Many thanks, Peter.

Much appreciated.

Stu.

Re: 2017 Annual Geomagnetic Data

Posted: Sat Jan 20, 2018 7:55 am
by Carbon60
I hope you find this interesting.

I've now plotted the data as a running average (5 days) to smooth out the peaks. I've also annotated and added SDO/AIA images to show where the geomagnetic activity originated, which turns out to be mostly coronal holes (CHs) and the ensuing fast flowing solar wind. There are a few CMEs in the mix, but these are relatively few in comparison.
2017 Geomagnetic Summary.jpg
2017 Geomagnetic Summary.jpg (143.68 KiB) Viewed 4661 times
It bodes well for aurora watchers in a declining solar cycle with fewer active regions, assuming that coronal holes persist throughout the cycle.

Thanks for looking.

Stu.

Re: 2017 Annual Geomagnetic Data- Updated

Posted: Sun Jan 21, 2018 5:59 pm
by marktownley
Excellent data Stu. I was saying at Liverpool Astro Society on friday evening that the significant majority of my Icelandic aurora observations over the years were a result of coronal holes apposed to CMEs. All makes sense really.

Re: 2017 Annual Geomagnetic Data- Updated

Posted: Mon Jan 22, 2018 7:01 am
by Carbon60
Very interesting, Mark.

I hope the talk went well.

Stu.

Re: 2017 Annual Geomagnetic Data- Updated

Posted: Mon Jan 22, 2018 2:01 pm
by rsfoto
Very interesting

Re: 2017 Annual Geomagnetic Data- Updated

Posted: Mon Jan 22, 2018 3:05 pm
by Montana
That's a nice presentation Stu :bow
Alexandra

Re: 2017 Annual Geomagnetic Data- Updated

Posted: Tue Jan 23, 2018 12:39 am
by highfnum
lots of work
well done

Re: 2017 Annual Geomagnetic Data- Updated

Posted: Tue Jan 23, 2018 6:34 am
by Carbon60
Many thanks Rainer, Alexandra & John.


Stu.