Significance of the high-latitude geomagnetic index AES-80: comparison with the PC index
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- Ballatore P.
- Bell Laboratories, Lucent Technologies LPCE/CNRS
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- Maclennan C. G.
- Bell Laboratories, Lucent Technologies
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A new index AES-80 was derived in order to provide a measure of the geomagnetic activity at high southern latitudes (Ballatore et al., 1998). The comparison between the southern hemisphere AES-80 with the northern hemisphere PC index is reported here for the period May 1994-April 1995. It is found that during southward IMF the two parameters record the geomagnetic disturbances rather similarly. In contrast, during northward IMF, only AES-80 is capable of recording geomagnetic activity occurring in the nominal polar cap region. In agreement with this finding, a slightly higher correlation coefficient is found between AES-80 and PC during southward IMF than during the northward IMF condition. Although at any time the two indices reflect opposite seasons, the overall correlations found between the two indices are significant, independent of the specific UT interval considered. The UT modulation (which should possibly be taken into account in the use of the indices) has been calculated for the AES-80 and the PC index. The results show that, for the specific period considered, the PC index dependence on UT is more significant than that of the AES-80 parameter.
収録刊行物
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- Earth, Planets and Space
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Earth, Planets and Space 51 (6), 425-430, 1999
地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会
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詳細情報 詳細情報について
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- CRID
- 1390282681485830400
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- NII論文ID
- 10002792522
- 130003780749
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- NII書誌ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL書誌ID
- 4843681
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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