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Solar Analemma. This outstanding image from Alexandra Hart taken over a period of 4 years charts the midday position of the sun in the sky throughout the year. The north–south component of the analemma results from the change in the Sun's declination due to the tilt of Earth's axis of rotation. The east–west component results from the nonuniform rate of change of the Sun's right ascension, governed by combined effects of Earth's axial tilt and orbital eccentricity.

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July '17 Geomagnetic Summary

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Carbon60
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July '17 Geomagnetic Summary

Post by Carbon60 » Sat Aug 05, 2017 2:50 pm

Hi all,

Here is my summary of geomagnetic activity for July.
July Summary.jpg
July Summary.jpg (261.14 KiB) Viewed 1919 times
The most significant event was the CME impact and consequent wake turbulence July 16th/17th which sparked a G2 storm and beautiful aurora. Apart from a minor CME event at the start of the month, mostly the space environment was fairly quiet except for occasional gusts of solar wind from a couple of coronal holes.

We'll see what August brings.

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)
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Re: July '17 Geomagnetic Summary

Post by marktownley » Sat Aug 05, 2017 3:02 pm

Good record Stu! Will be interesting to see what august does bring!
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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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Re: July '17 Geomagnetic Summary

Post by Carbon60 » Mon Aug 07, 2017 5:38 am

Many thanks, Mark.

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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Re: July '17 Geomagnetic Summary

Post by Montana » Mon Aug 07, 2017 6:58 am

Still a fair bit of activity for a quiet Sun so hopefully these coronal holes will bring some aurora activity this autumn.

Alexandra

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Re: July '17 Geomagnetic Summary

Post by Carbon60 » Tue Aug 08, 2017 5:47 am

Hi Alexandra, let's hope so. I was hoping for something later this week ahead of my trip to Iceland, but AR2670 appears to be too stable and I don't see any coronal holes on the horizon in time for my short stay. Ah well.....

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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Re: July '17 Geomagnetic Summary

Post by marktownley » Wed Aug 09, 2017 6:39 am

There are still some NLC around Stu, keep an eye open for them. Looking forward to hearing how you got on, take lots of pics!
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http://brierleyhillsolar.blogspot.co.uk/
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Re: July '17 Geomagnetic Summary

Post by highfnum » Wed Aug 09, 2017 8:53 pm

please explain in short summary why coronal hole
behaves a bit like flare activity

nice work
JP

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Re: July '17 Geomagnetic Summary

Post by Carbon60 » Thu Aug 10, 2017 6:48 am

Thanks, Mark. I'll certainly keep a look out for NLCs. Some aurorae would be nice though.

John, coronal holes allow the solar wind to flow more freely from the Sun, pushing charged particles at high speed out into space. When Earth is in the wind stream we see the effects as aurorae and geomagnetic unrest.

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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Re: July '17 Geomagnetic Summary

Post by Montana » Thu Aug 10, 2017 9:01 am

You are in luck Stu, a coronal hole is just opening up for your Iceland trip :)
Alexandra

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Re: July '17 Geomagnetic Summary

Post by marktownley » Thu Aug 10, 2017 10:17 am

Carbon60 wrote:
Thu Aug 10, 2017 6:48 am
Thanks, Mark. I'll certainly keep a look out for NLCs. Some aurorae would be nice though.
Based on when we were there this time last year you need to be observing from 1am-3am local time for any chance of seeing them, it's light for the rest of the time.
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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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Re: July '17 Geomagnetic Summary

Post by Carbon60 » Sun Aug 13, 2017 8:53 am

Who needs sleep? :)

Thanks for the tip, Mark.

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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