• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1993-01-01T00:00:00.000+00:00

The study of magnetism is one of the oldest of the geophysical sciences. It is unique among the sciences in that ancient records of the geomagnetic field are preserved in rocks and changes in the...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1998-05-13T00:00:00.000+00:00

Storm Sudden Commencements (ssc) 1868 to present: STORM1 and STORM2 Lists: (Some text here is taken from the International Association of Geomagnetism and Aeronomy (IAGA) Bulletin 39) 1868-1967...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1957-01-01T00:00:00.000+00:00

The geomagnetic aa indices are the continuation of the series beginning in the year 1868. A full description of these indices is given in the International Association of Geomagnetism and Aeronomy...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1969-01-01T00:00:00.000+00:00

The geomagnetic aa index provides a long climatology of global geomagnetic activity using 2 antipodal observatories at Greenwich and Melbourne- IAGA Bulletin 37, 1975 p. 128

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1998-05-13T00:00:00.000+00:00

A full description of the indices Kn, Ks, Km is given in a monography,"Indices Kn, Ks et Km, 1964-1967", edited in 1968 by the Centre National de la Recherche Scientifique, 15 quai Anatole,...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1998-05-13T00:00:00.000+00:00

The abbreviations used for observatory names are as follows: GEOMAGNETIC OBSERVATORIES Code Station Geomagnetic Latitude ABG Alibag AMS Martin de Vivie. These data present the principal magnetic...

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• Organization: National Oceanic and Atmospheric Administration, Department of Commerce
• Updated: 1972-01-01T00:00:00.000+00:00

Information on the past and present orientation of the Earth's magnetic field is available from the National Geophysical Data Center (NGDC) which serves as the national data bank for geomagnetic...

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