Co-Seismic Geomagnetic Variations Observed at the 1995 Hyogoken-Nanbu Earthquake.
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- Iyemori T.
- Faculty of Science, Kyoto University
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- Kamei T.
- Faculty of Science, Kyoto University
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- Tanaka Y.
- Faculty of Science, Kyoto University
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- Takeda M.
- Faculty of Science, Kyoto University
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- Hashimoto T.
- Faculty of Science, Kyoto University
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- Araki T.
- Faculty of Science, Kyoto University
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- Okamoto T.
- Fukui National College of Technology
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- Watanabe K.
- Disaster Prevention Research Institute, Kyoto University
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- Sumitomo N.
- Disaster Prevention Research Institute, Kyoto University
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- Oshiman N.
- Disaster Prevention Research Institute, Kyoto University
Bibliographic Information
- Other Title
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- Co-Seismic Geomagnetic Variations Obser
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Description
Impulsive co-seismic geomagnetic variations were observed at two stations nearly 100 km apart from the source region of the 1995 Hyogoken-Nanbu earthquake (M= 7.2). The maximum amplitude at the main shock was 0.6∼1.0 nT and the duration was 20∼30 seconds. These variations seem to have commenced at the origin time and before the arrival of the seismic waves to the observation site of 17 seconds later. A superposed epoch analysis for the aftershocks also reveals similar geomagnetic variations though the amplitude of them is one order of magnitude smaller than that of the main shock. A crustal dynamo mechanism is discussed as a possible cause of such co-seismic geomagnetic variations.
Journal
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- Journal of geomagnetism and geoelectricity
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Journal of geomagnetism and geoelectricity 48 (8), 1059-1070, 1996
Society of Geomagnetism and Earth, Planetary and Space Sciences
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Details 詳細情報について
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- CRID
- 1390282681487575808
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- NII Article ID
- 130003559444
- 10002202158
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- NII Book ID
- AA00698879
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- ISSN
- 21855765
- 00221392
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- NDL BIB ID
- 4079937
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed
