X9.3 Flare Geomagnetic Effect

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Carbon60
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X9.3 Flare Geomagnetic Effect

Post by Carbon60 » Thu Sep 07, 2017 5:51 am

Solar flares in themselves usually have an imperceptible effect on our geomagnetic environment as measured with standard magnetometers. Coronal mass ejections that often accompany them, when Earth directed, usually do, but the effect is delayed usually by a few days as the plasma mass transits from the Sun to the Earth.

Yesterday was different. The highly energetic X9.3 solar flare at AR2673 produced so much UV output that the geomagnetic environment was instantly (temporarily) transformed. No delay here (except the usual 8 minutes) as the UV blast sped across the void at 300,000 km/s, days ahead of the CME produced as AR2673 erupted.

It's unusual to detect the geomagnetic effects of flares, which is a testimony to the extreme power of this event.

Here are the data from my hi-res (1 second cadence) magnetometer:
20170906_X-Class Flare.jpg
20170906_X-Class Flare.jpg (126.97 KiB) Viewed 291 times
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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p_zetner
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Re: X9.3 Flare Geomagnetic Effect

Post by p_zetner » Thu Sep 07, 2017 2:05 pm

What an incredible capture, Stu! I always thought it was just charged particle flux that messed with the magnetosphere. This UV effect is amazing!

Cheers.
Peter.

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Carbon60
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Re: X9.3 Flare Geomagnetic Effect

Post by Carbon60 » Fri Sep 08, 2017 6:00 am

It is amazing how UV can effect the ionosphere, the electrical current sheet and, consequently, the magnetic field.

Thanks for your interest, Peter.

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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Montana
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Re: X9.3 Flare Geomagnetic Effect

Post by Montana » Fri Sep 08, 2017 11:02 am

Wow!! that is incredible! I hope you got last nights kp8 storm too, I have never seen the Lancaster chart so high. Pity it was raining last night :(
Aurora 2017-09-08.PNG
Aurora 2017-09-08.PNG (62.23 KiB) Viewed 270 times
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Re: X9.3 Flare Geomagnetic Effect

Post by highfnum » Fri Sep 08, 2017 11:26 am

great catch super work as usual
I ran my magnetometer on 6 and 7 I wonder if I caught something

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Re: X9.3 Flare Geomagnetic Effect

Post by marktownley » Sun Sep 10, 2017 9:00 pm

Superb to see! I've been struggling with time lately to catch up with matters solar.
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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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