I undertook some additional research into the phenomenon mentioned by marakai [Coronal Holes]. I found the idea interesting and curious...informing, however another thing [issue] I noted was a reference to a feature of the solar magnetic field which I found difficult to understand.

Any magnetic field is not possible without its complementary and corresponding electric counterpart...with the cross-product of the two vectors giving the direction of force applied to a moving charged particle within the field, which also depends on the charge sign.

While the solar magnetic field provides the sheet-plasma of the solar "wind" -- within the solar ecliptic plane -- and is understood to take around 8 minutes to reach Earth's Bow-Shock region, I understand it is more likely to be interactions of higher-energy charged particles higher in the Earth's atmosphere...that gives rise to lower altitude effects, when a Coronal Hole is apparent.

As Coronal Holes suggest lower UV and X ray electromagnetism -- because they are holes when seen through those filters -- I think it would be probable secondary or tertiary showers of charged particles from the mesosphere...due to these holes...could impact SSW events .

What about the magnetic field lines associated with a permanent magnet?

Put a bit of paper over one and sprinkle iron filings over it - thats not a conception!?

Sorry - I thought that you thought that they dont actually exist.

....and by "immaterial" - I dont recommend you go putting your testicles into a strong mag field.

What sort of response is desired? The lines are not physical objects, that I understand.

It's interesting to me to ask in what way do they exist - a sort of inferred existence? which is only manifest through an effect on a medium?

Bringing this back to atmospherics -I'm tempted to believe, though not absolutely certain, that planetary waves might be described in same way.