On Thursday, 19 October 2023 at 14:14:56 BST, callum_potter <callum.potter@...> wrote:
You might have noticed the item today on spaceweather.con about a sine
wave 'ring' in the magnetosphere, on the 17th October at about 16:50
UT.
I had a look at my magnetometer daily plot but at the normal scale
there was just a little fuzz. So I processed a subset of the raw data
and plotted that, and it does seem to show a regular undersampled sine
like variation (with a bit of imagination).
My measurement cadence is 10s, and with the signal period being around
25s I think this is the sort of thing to expect.
My magnetometer is also E-W orientation and maybe it might be more
pronounced in Z (or N-S).
I was wondering if any other magnetometer operators had noticed this.
Might be worth a look and replotting at higher resolution.
I had not realised such high-frequency phenomena existed - I think I
will increase the recording cadence to 1s or 2s to hopefully capture
these better in the future.
Hope this is of interest.
Callum
--
Callum Potter FRAS,
Fealquoy, Rousay, Orkney, Kw17 2PS
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