self-exciting dynamo

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geomagnetic field

Overview page. Subjects: Meteorology and Climatology.

The Earth's magnetic field shows variability on all time-scales, ranging from nanoseconds to millions of years. Most transient variations are of external origin, reflecting interactions...

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Walter Maurice Elsasser

Overview page. Subjects: Earth Sciences and Geography.


A German-born physicist, Elsasser became a US citizen in 1940. He worked on the structure of the nucleus and on terrestrial magnetism. In 1946, he proposed that a...

See overview in Oxford Index