Geomagnetic indices

Gordon Rostoker

doi:10.1029/rg010i004p00935

Geomagnetic indices

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Gordon Rostoker

書誌事項

公開日: 1972-11

権利情報

http://onlinelibrary.wiley.com/termsAndConditions#vor

DOI

10.1029/rg010i004p00935

公開者: American Geophysical Union (AGU)

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説明

<jats:p>The purpose of this review is to outline the definition and method of derivation of the indices of geomagnetic activity that are most commonly used at present. The first part of the review presents the methods of derivation of <jats:italic>Kp</jats:italic>, <jats:italic>ap</jats:italic>, <jats:italic>AE</jats:italic>, and <jats:italic>Dst</jats:italic>; the second part involves a discussion of the strengths and weaknesses of each index. It is shown that the distribution of magnetic observatories whose data are used in the production of the indices strongly influences the quantitative reliability of the indices in varying degrees. Furthermore, it is found that, in general, indices are only capable of defining the lower limit of geomagnetic activity at any given time. It is concluded that indices should only be used in statistical studies of solar‐terrestrial interactions; their use in the study of individual events is generally not advisable.</jats:p>