
TY  - JOUR
A1  - Parkinson, W.D. 
T1  - Low frequency geomagnetic variations and induction studies
JF  - Exploration Geophysics
JO  - Explor. Geophys.
Y1  - 1993
VL  - 24
IS  - 2
SP  - 145
EP  - 146
KW  - 
UR  - https://doi.org/10.1071/EG993145 
N2  - 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. 
ER  -

