Geomagnetic Summary September 2016

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Carbon60
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Geomagnetic Summary September 2016

Post by Carbon60 » Sun Oct 09, 2016 4:28 pm

If this works out you should see an animated gif of the sun made from a series of SDO-AIA images through 28 days of September (one full solar rotation).

ImageAnimated SDO-AIA Images through 28 days September 2016 by Stuart Green, on Flickr

I've inverted the view so as to emphasise the large coronal hole (in white), rotating with the Sun and persisting through the revolution. Fast flowing solar wind emerging from this coronal hole generated G1/G2 solar storms at the beginning and towards the end of September on both occasions as the coronal hole swept past. The local magnetic disturbance resulting from the impact of solar particles on our magnetic protective bubble were detected and recorded on my magnetometer, as shown below as 'rate of change'.
September Summary.jpg
September Summary.jpg (255.82 KiB) Viewed 724 times
For now things have calmed down again, but if the hole persists for another revolution then 'stormy (space) weather' could be in store in a few days time. Anyone planning a trip to Earth's aurora regions might like to take note :)

Thanks for looking.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

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marktownley
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Re: Geomagnetic Summary September 2016

Post by marktownley » Mon Oct 10, 2016 5:44 am

This is excellent Stu! It shows that coronal hole really well.
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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Montana
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Re: Geomagnetic Summary September 2016

Post by Montana » Mon Oct 10, 2016 11:50 am

What a great animation! it really shows the Sun has sides and not all the activity is evenly distributed. So when we have spots we have no aurora and vice versa at the moment, opposite to solar maximum when spots = aurora
:bow :hamster:

Alexandra

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Carbon60
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Re: Geomagnetic Summary September 2016

Post by Carbon60 » Mon Oct 10, 2016 7:12 pm

Many thanks, Mark & Alexandra. It certainly confirms that we don't necessarily require CMEs to generate geomagnetic activity. A nice big coronal hole does just fine. ;)

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

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marktownley
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Re: Geomagnetic Summary September 2016

Post by marktownley » Tue Oct 11, 2016 5:18 am

All my Icelandic aurora in august were caused by coronal holes, and they were some of the best ones i've seen.
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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