Solar cycle variation in geomagnetic external spherical harmonic coefficients.
Open Access
- 1 January 1979
- journal article
- Published by Society of Geomagnetism and Earth, Planetary and Space Sciences in Journal of geomagnetism and geoelectricity
- Vol. 31 (5), 495-508
- https://doi.org/10.5636/jgg.31.495