
TY  - JOUR
A1  - Lilley, F.E.M. 
T1  - Geomagnetic induction: the study of geomagnetic induction physics
JF  - Exploration Geophysics
JO  - Explor. Geophys.
Y1  - 1986
VL  - 17
IS  - 1
SP  - 22
EP  - 24
KW  - 
UR  - https://doi.org/10.1071/EG986022 
N2  - Fluctuating electric currents, flowing external to the earth in the ionosphere, the magnetosphere, and beyond, act as primary source fields which cause electromagnetic induction in the solid earth. Secondary electric currents (or 'eddy currents') are thus induced to flow in the earth's oceans, crust, and upper mantle. The horizontal distances over which the primary and secondary currents flow are of the order of thousands of kilometres. 
ER  -

