Weak CME Impact 1st-2nd Feb 2022-Updated

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Weak CME Impact 1st-2nd Feb 2022-Updated

Post by Carbon60 »

The anticipated CME arrived overnight (UT) producing only a weak geomagnetic effect (not even a G1 storm) and no significant aurora. Nevertheless, it was detected on my magnetometer here in the NW of England, as shown below.

I've provided both the declination plot (top) and my usual rate of change plot. I tend to use the latter for long duration plots >2-3 days to remove the influence of minor temperature changes at the sensor buried underground. It's shown here as a means of comparison with previous plots.
20220202_Weak CME.jpg
20220202_Weak CME.jpg (106.53 KiB) Viewed 1142 times
It looks like things have settled down again for the time being.

Thanks for looking.

Stu.
Last edited by Carbon60 on Thu Feb 03, 2022 9:46 am, edited 3 times in total.


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Re: Weak CME Impact 1st-2nd Feb 2022

Post by Montana »

This is weak, your best was nearly up to 15 :)

Oh well, a little breath of solar wind :hamster:

Alexandra


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Re: Weak CME Impact 1st-2nd Feb 2022

Post by Carbon60 »

Ha..ha....yes. 15 is the record so far. Let's hope for more over the coming months. ;)

Stu.


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Re: Weak CME Impact 1st-2nd Feb 2022

Post by EGRAY_OBSERVATORY »

Thanks Stu for the update from the Behemoth.

Should we call this as "Damp Squid" of the event :?: :lol:

Cheers
Terry


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Re: Weak CME Impact 1st-2nd Feb 2022

Post by MapleRidge »

As weak as it was, it is good to see you got a record of it :bow

Brian


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Re: Weak CME Impact 1st-2nd Feb 2022

Post by marktownley »

A good capture as always Stu


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Re: Weak CME Impact 1st-2nd Feb 2022

Post by Carbon60 »

Many thanks, Terry, Brian and Mark.

Stu.


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Re: Weak CME Impact 1st-2nd Feb 2022

Post by Carbon60 »

Updated data showing a second wave of geomagnetic unrest in the wake of the original impact.
20220203_Weak CME.jpg
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Stu.


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Fluxgate Magnetometers (1s and 150s Cadence).
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Re: Weak CME Impact 1st-2nd Feb 2022-Updated

Post by EGRAY_OBSERVATORY »

Thanks Stu for your latest report

Terry


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Re: Weak CME Impact 1st-2nd Feb 2022-Updated

Post by Montana »

What does it mean when one goes and up and the other goes down? is that opposite polarity?

Alexandra


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Re: Weak CME Impact 1st-2nd Feb 2022-Updated

Post by marktownley »

Nice addition Stu


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Re: Weak CME Impact 1st-2nd Feb 2022-Updated

Post by Carbon60 »

Many thanks, Terry, Alexandra and Mark.

Stu.


H-alpha, WL and Ca II K imaging kit for various image scales.
Fluxgate Magnetometers (1s and 150s Cadence).
Radio meteor detector.
More images at http://www.flickr.com/photos/solarcarbon60/
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Re: Weak CME Impact 1st-2nd Feb 2022-Updated

Post by Carbon60 »

Montana wrote: Thu Feb 03, 2022 3:59 pm What does it mean when one goes and up and the other goes down? is that opposite polarity?

Alexandra
Hi Alexandra,
The best way to think of it is to imagine holding a compass, facing north. During a geomagnetic event the compass needle will move either clockwise to the west, or anti-clockwise to the east (very slightly, as the effect is small). The angle of movement away from north in either direction is called the declination. My magnetometer is really just a declinometer, which measures this variation in declination with east being up the scale (positive declination) and west down the scale (negative declination). The degree of change, the rate of change and the direction of change during a storm depends on the magnetic polarity and intensity of the solar wind, or CME, hitting Earth. Southerly magnetically oriented solar wind, for example, produces a stronger effect than northerly magnetically oriented wind because the field lines carried within the solar plasma can link up with Earth’s magnetic field lines, thereby providing an easy route for energetic particles to enter a get directed to Earth’s poles, producing the Aurora.

Exactly how much and in which direction the declination changes I think is quite a complex phenomenon involving plasma physics and has to do with how the solar wind induces ring currents within the magnetosphere and ionosphere environments. These ring currents are what induce the changes in declination.

Rather long winded, but if you want some bedtime reading for more detail on the subject, here’s an article that might be of interest.


https://link.springer.com/article/10.1 ... 017-0412-2

Stu.


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Re: Weak CME Impact 1st-2nd Feb 2022-Updated

Post by Montana »

Thanks Stuart, I get it now :)

Alexandra


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