[Tanniker Smith]

Only half jesting. I know it's a possibility and probably a greater threat to our livelihood than Global Warming...

since the 19890’s

whoops. was that 80s or 90s?
(not joking with you -- I'm a prince of typos myself)

[Robert A Cook PE]

1890’s ... Geomagnetism has been dropping for about 120 years now. Good catch - thank you.