- naem
- May 29, 2011
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I skimmed the article and was mostly surprised they didn't go into the whole pole-flipping thing, which I've definitely seen apocalyptic screeds about.
It's a real thing, and is a valid concern, but as I recall it is not a point-in-time event like an earthquake, for instance.
The Earth's magnetic field is kind of weird - it moves, and there are places where compasses won't work or reverse polarity. There is good long-term research on it thanks to the Royal Navy keeping meticulous records of compass readings from ships at sea, so we actually have a fair amount of data on it going back well over a century.
reading the words “100 years of compass readings,” I forget sometimes how fast technology has advanced
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