Nature · 1960 · 26 citations · 1 references
Natural SciencesEarth SciencesGeophysicsElectromagneticsElectromagnetismGeomagnetismGeomagnetic Field SourcesGeomagnetic IndicesMagnetic AnomaliesMagnetic StormsGeomagnetic ExcursionsGeomagnetic LongitudeGeomagnetic Secular VariationMagnetic Field GradientsMagnetic Field InhomogeneityMagnetic Field VariabilitySporadic E Propagation
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