Electromagnetic response of the mantle to long-period geomagnetic variations over the globe
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- Honkura Yoshimori
- Department of Earth and Planetary Sciences, Tokyo Institute of Technology
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- Matsushima Masaki
- Department of Earth and Planetary Sciences, Tokyo Institute of Technology
書誌事項
- タイトル別名
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- Electromagnetic response of the mantle
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Long-period electromagnetic response must be estimated to derive information on the electrical conductivity distribution within the deep mantle of the Earth. For this, we estimated the electromagnetic response function for long-period geomagnetic variations, on the basis of the P1 approximation. The data used for analyses are geomagnetic daily mean values for 10 years (1965-1974) from 59 stations distributed over the globe and for about 20 years (1960-1980) from 9 stations. It turned out that the P1 approximation generally holds except for the periods corresponding to annual and semi-annual variations. We also found that accurate estimation is difficult for periods longer than a few years, probably because of contamination due to secular variations of core origin.
収録刊行物
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- Earth, Planets and Space
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Earth, Planets and Space 50 (8), 651-662, 1998
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
- 1390001206511475456
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- NII論文ID
- 10003735744
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- NII書誌ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL書誌ID
- 4573118
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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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- 使用不可