Geomagnetic and Archeomagnetic Jerks: Where Do We Stand? | Zendy

Mandea Mioara | Zendy; Olsen Nils | Zendy

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Geomagnetic and Archeomagnetic Jerks: Where Do We Stand?

Author(s) -

Mandea Mioara,

Olsen Nils

Publication year - 2009

Publication title -

eos, transactions american geophysical union

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.316

H-Index - 86

eISSN - 2324-9250

pISSN - 0096-3941

DOI - 10.1029/2009eo240004

Subject(s) - earth's magnetic field , secular variation , dynamo , dynamo theory , outer core , geomagnetic secular variation , magnetic field , term (time) , geodesy , variation (astronomy) , geophysics , physics , field (mathematics) , core (optical fiber) , constant (computer programming) , geology , inner core , mathematics , astrophysics , astronomy , quantum mechanics , geomagnetic storm , pure mathematics , optics , computer science , programming language

The Earth's magnetic field is generated mainly by a self‐sustaining dynamo in the fluid outer core. Known as the core or main field, the dynamo's magnetic field is not constant but changes with time, a phenomenon denoted as secular variation. Unfortunately, no common agreement exists about the definition of secular variation: While some use this term for the temporal changes of the core field in general, others use the term only for its linear part (first time derivative).

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