Good grief. There are so many problems with this I’ll just point out the most basic: Band activity is NOT the same thing as ionospheric propagation.
That is exactly what we are experiencing... as the trade winds stop and you get these large N/S weather systems and very little W to E movement. So are they caused by the declining magnetic field or global warming. Are the trade winds changing direction once the shift has completed! Either way that is not good! We do not have time to blame, we need to change the way feed ourselves quickly or it will be a big food crises! The change in propagation and the observation in the sky is another wake-up call that we can not ignore!
From the papers and monographs I have examined, it would seem that at least in some areas of paleointensity minima of the geomagnetic field remained at least 10% of the prior intensity, so it would seem be to be sufficient to save the atmosphere - to some degree. Many of the papers found online are somewhat dated (2006 to 2077) - and others have math hard enough to hurt when read. (19960022789.pdf (nasa.gov)) Several fairly recent papers have been published looking at the greater dataset of Paleomagnetic records and are quite informative. Like this Extending Global Continuous Geomagnetic Field Reconstructions on Timescales Beyond Human Civilization (gfz-potsdam.de) Rather academic, to say the least, as there is nothing I or anyone else can do other than study what has already occurred and try to puzzle that data into understanding what might come in the future. .
I noticed recently that my magnetic compass is off. It no longer points straight north. And my toilet is draining in the opposite direction than it used to. And the sun seems to crawl across my local horizon every day. I wonder if earths weakening magnetic field is causing what I see.
The Hopi Indians explain it all. Grab an elder and buckle -up https://astrology.com.au/blog/prophecies-of-the-hopi-indians
(yawn). Just another end of the world disaster prediction. I'm on my eighty third trip around the sun. Heard it all before. When the current "the sky is falling" disaster poops out the Henny Penny bunch will just start a new one. I'm hoping this time I will at least get a Tee Shirt with the logo, HENNY PENNY IS A BIRD BRAIN
Like our global climate, the Earths magnetic field has NEVER been static and is in a constant state of flux, flipping polarity periodically with increases, decreases and migration of the magnetic axes in between. This is nothing new. Perhaps it's just a "The workd is Flat" view by some that the place we are born into does not or should not change. But it does, all the time. And Darwin takes care of the rest.
Oh No ! "The Sky is falling" ... Now how will the conspiracy theorists and doomsday preppers handle that??? The earth's magnetic field has periodically flipped; there is lots of evidence for this! See: https://climate.nasa.gov/ask-nasa-c...ic-field-arent-causing-todays-climate-change/
Right. 40m is very unusually quiet. I'm not sure if this happens a lot, or this is a very unusual phenomenon.
I am transmitting and listening with a MagneticLoop antenna on my balcony. Means, I am anyhow on the lower end of TX EIRP and antenna G/T. 30W - 40W maximum transmission power from the radio is all what I can get in FT4/FT8 communications. Surprisingly for me, I have had very good connections in the higher HF bands over the last weeks - especially 10m was sensational with good and steady band openings from Europe to the Americas. On the other hand, I rarely get a 40m connection working in these days, no matter how hard I try and how persistant I am. No idea why it is like that, but I was able to work loads of grid square "firsts". What I was able to see, on the other hand, was a relatively high SFN of 160 in comparison with summer and a pretty quiet magnetic field (A & K values) over the last weeks. 73!