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[–][deleted]  (2 children)

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    [–]bobbobbybob 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (1 child)

    what could produce that dynamo effect besides the Earth's plasm

    well, i don't know. a central plasma sun seems essential.

    spinning iron doesn't allow for observed fluctuations

    [–][deleted] 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

    What model are you basing this on? A spherical, even distribution of iron? Everything fluctuates: the sun's emissions, cosmic rays, etc.