I need to know Earth's magnetic field at my geographic location. I tried to google it, but I don't see anything concrete; moreover, I see tons of contradicting information on how often does the magnetic field change direction and how fast is it decaying. Does anyone know a reliable source? All I need is an estimate, but for a concrete location (say, San Francisco, CA, USA, 37°39′22″N, 122°25′32″W) and approximate date as August 2006.
The best answer will get 10 points. No silly answers, please.
2006-08-22
19:30:25
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4 answers
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asked by
Snowflake
7
in
Physics