Earth takes a regular beating

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Carbon60
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Earth takes a regular beating

Post by Carbon60 » Wed Dec 21, 2016 11:38 pm

Hi all,

For the past three months there have been a couple of large coronal holes on the opposite faces of the Sun that have periodically blasted the Earth with high velocity solar wind as the Sun rotated to face them Earthward.

Not only did the resulting pulses of solar wind create beautiful aurora, they also disturbed Earth's magnetic field, creating geomagnetic storms detectable on my magnetometer based here in the UK.

I've plotted these periodic blasts to show their regularity, together with SDO images of the corresponding coronal holes. Who knows how long these will continue to be significant features? One thing is for sure, they make it easier to predict when the next storms are likely to occur.
20161221_Coronal Holes_3-Month.jpg
20161221_Coronal Holes_3-Month.jpg (241.3 KiB) Viewed 1184 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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marktownley
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Re: Earth takes a regular beating

Post by marktownley » Thu Dec 22, 2016 8:11 am

This is excellent data Stu! Some of my friends have gone to lapland for a couple of days and were reporting aurora from there. Does this / these coronal holes track back to being the same feature that caused the aurora I saw in august in Iceland?
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Montana
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Re: Earth takes a regular beating

Post by Montana » Thu Dec 22, 2016 9:58 am

Fantastic data set Stu :hamster: I went out to the cow field last night and took a few images but I don't think anything has come out on the pics, I need to have a closer look on the computer screen tonight.

Alexandra

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Re: Earth takes a regular beating

Post by Carbon60 » Thu Dec 22, 2016 11:32 am

Hopefully you managed to capture something, Alexandra. It looked like a good night for it from my magnetometer- data to follow.

Mark, it looks like it was the same coronal hole when we spin back through the months. Here's some data going back six months together with SDO/AIA images which I've retrieved from SpaceWeather.com for dates going back in steps of approximately 28 days.
20161221_Coronal Holes_6-Month.jpg
20161221_Coronal Holes_6-Month.jpg (257.89 KiB) Viewed 1162 times
It looks like the hole might have first started sometime in July.

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: Earth takes a regular beating

Post by marktownley » Thu Dec 22, 2016 12:03 pm

Fascinating data! Thanks Stu!
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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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Carbon60
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Re: Earth takes a regular beating

Post by Carbon60 » Thu Dec 22, 2016 3:46 pm

Thanks Mark/Alexandra,

Here are the data specific to yesterday's geomagnetic storm.
20161221_Coronal Hole.jpg
20161221_Coronal Hole.jpg (131.37 KiB) Viewed 1148 times
It looks like the main pulse was a little early for us in the UK.

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/

highfnum
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Re: Earth takes a regular beating

Post by highfnum » Fri Dec 23, 2016 1:09 pm

nice work
i had many things going on now, miss last one

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Montana
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Re: Earth takes a regular beating

Post by Montana » Sat Dec 24, 2016 3:47 pm

Yes, I was out during the 9pm pulse and there is nothing on my pictures :(

Alexandra

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Re: Earth takes a regular beating

Post by Montana » Wed Dec 28, 2016 7:42 am

A whole article on Spaceweather!!!!!!! well done :hamster: :hamster: :hamster: :hamster: :hamster: how fantastic Stu, wonderful work.

The hubby was just viewing and I thought I recognise that, stop, wait!
Alexandra

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Re: Earth takes a regular beating

Post by marktownley » Wed Dec 28, 2016 8:51 am

Congrats indeed! Here is the link to it for future reference http://spaceweather.com/archive.php?vie ... &year=2016
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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: Earth takes a regular beating

Post by Carbon60 » Wed Dec 28, 2016 9:42 am

Many thanks, Alexandra/Mark.

It was a nice surprise the other day when Tony Phillips contacted me by email to ask for a bit of background information and said he was planning to run a feature, but it's thanks to you and others who also contribute to SolarChat including our dear departed friend Swiss Walter for all the encouragement over the years. These things take time and significant effort to grow and develop through multiple levels of refinement and it would be a pretty empty exercise without everyone's support, so thank you SolarChatters and Stephen, of course.

We now have 4 working magnetometers based on this design. Anyone else interested in making one can check out the tutorial in the reference library:

viewtopic.php?f=7&t=20437


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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