High Resolution Magnetometry

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Carbon60
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High Resolution Magnetometry

Post by Carbon60 » Sun Mar 08, 2015 1:34 pm

Hi all,

I noticed some unusual 'bursts' in published magnetographs this morning, so I checked out my own data and sure enough there were three distinct periods of relatively rapid fluctuation at around 06:45, 07:45 and 08:15 (UT) this morning (March 8th). I was intrigued, as usually magnetic fluctuations of significant amplitude appear to occur relatively slowly and these appeared to have been unusually quick.

I record data at 2.5 minute intervals and usually publish at this cadence, but I also record at 1 second intervals. This morning was a good opportunity to checkout the difference between the two datasets.

Below is a comparison chart showing the full set of data at 2.5 minute cadence between 6am and 12pm and a zoomed-in section over the period in question. Also shown is the higher resolution data at 1 second intervals over this same period. Interestingly the high resolution data show significant structure within these events than the low resolution data, indicating that indeed the events were rapid and changing over very short periods (matter of seconds). Note how the singlet peaks labelled A, B and C have become doublets on the high resolution chart.
March 8th Hi_Lo_Comparison.jpg
March 8th Hi_Lo_Comparison.jpg (114.29 KiB) Viewed 802 times
This is not a CME event, but it could be as a result of Earth passing through a Co-rotating Interactive Region (CIR) zone, with compressed and rarefied solar wind, or as a result of fast flowing (570km/s) solar wind from coronal holes, both of which have been expected this weekend.

I'm sure this is old news to the experts, but fascinating stuff nevertheless.

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: High Resolution Magnetometry

Post by marktownley » Sun Mar 08, 2015 1:51 pm

fascinating indeed!
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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grimble_cornet
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Re: High Resolution Magnetometry

Post by grimble_cornet » Sun Mar 08, 2015 2:09 pm

Wow..... that looks interesting, I must check my readings for comparison.
I was getting some 'spiky' responses last night which were not quite what the commercial ones were showing?


OK..... I only have 2.5 minute cadence data but it seems to match yours pretty well :o
0600-1200 trace 8th March 2015.jpg
0600-1200 trace 8th March 2015.jpg (129.6 KiB) Viewed 797 times
.

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Mike Garbett

Selection of Solar and Deep Sky images on Flickr: https://www.flickr.com/photos/mikegarbett/

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Montana
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Re: High Resolution Magnetometry

Post by Montana » Sun Mar 08, 2015 6:47 pm

Fantastic science :bow :bow :bow

Alexandra

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swisswalter
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Re: High Resolution Magnetometry

Post by swisswalter » Mon Mar 09, 2015 5:32 am

Hi Stuart

thank you very much for the presentation, fascinating stuff
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

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