Concepedia
Surveys in Geophysics · 1984 · 16 citations · 1 references
Natural SciencesGeologyElectromagnetismGeomagnetismInstrumentationDigital Signal ProcessingGeomagnetic IndicesMagnetic CharacterizationMagnetic SusceptibilityMagnetic Data ProcessingMagnetic Data ReductionMagnetic Field Data AnalysisMagnetic Recording
1
The three‐hour‐range index measuring geomagnetic activity
J. Bartels, N. H. Heck, Hamish Johnston · Terrestrial Magnetism and Atmospheric Electricity · 1939 · 395 citations
Natural Sciences, Earth Sciences, Geophysics +13