was when you get a flip you can expect the start of the next glaciation pretty soonAs long as we agree that a 'flip' doesn't happen quickly. It takes time. A long time. And that is when Earth may be unprotected.
Once it has 'flipped' 180 degrees, then things will be back to normal.
I will, however, have been dead for 10,000 years.
The geologic evidence is that it's already underway before you realize it ~ business about building new fields while the old fields are withering away. That's why the folks who engage in the study of the Earth's magnetic field got so excited a few years back when the North magnetic poll started heading toward Russia at 80MPH.
I think some folks believe these magnetic field changes happen like 3-phase electric motors but they don't.