
%0 Journal Article
%A Parkinson, W.D. 
%T Low frequency geomagnetic variations and induction studies
%J Exploration Geophysics
%D 1993/06/01
%V 24
%N 2
%P 145-146
%K 
%R https://doi.org/10.1071/EG993145
%U https://www.publish.csiro.au/paper/EG993145 
%X Geomagnetic variations of external origin cover a wide frequency spectrum, from Pcl (or even Schumann radiation) to 11-year fluctuations. "Low frequency variations" as generally understood, include the diurnal variations with periods of 24, 12, 8 and 6 hours. 
