| Multidisciplinary and Interdisciplinary(M) |
| Session Sub Category |
Intersection(IS)
|
| Session ID |
M-IS29
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| Title |
Extremely severe geomagnetically induced currents in Japan
|
| Short title |
Extremely severe GIC
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| Convener |
Name |
Shigeru Fujita
|
| Affiliation |
Meteorological College, Japan Meteorological Agency
|
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Co-convener 1.
|
Name |
Ikuko Fujii
|
| Affiliation |
Kakioka Magnetic Observatory, Japan Meteorological Agency
|
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Co-convener 2.
|
Name |
Ryuho Kataoka
|
| Affiliation |
Tokyo Institute of Technology
|
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Co-convener 3.
|
Name |
Yusuke Ebihara
|
| Affiliation |
Research Institute for Sustainable Humanosphere, Kyoto University
|
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Co-convener 4.
|
Name |
Shinichi Watari
|
| Affiliation |
National Institute of Information and Communications Technology
|
| International Symposium |
No request
|
| Language |
Japanese
|
| Scope |
In March 13, 1989, huge geomagnetically induced currents (GICs) associated with sudden changes of the geomagnetic field caused power line failure in Canada due to damage of the transformer installed in a substation. Meanwhile, since such accidents have been regarded to occur only in the region of higher geomagnetic latitudes, Japan has been supposed to be free from the GIC accidents. However, it is not obvious how huge GIC would be supposed in Japan for extremely severe geomagnetic storms like the Carrington storm in September, 1859. Therefore, it is the obligatory issue for the Japanese scientists studying magnetic field variations in space and on the surface of the Earth to evaluate extremely large GICs in Japan, potentially occurring once per several hundred years. In this session, we will discuss following multidisciplinary topics and related ones; 1) estimate of intensity of the extremely severe space weather phenomena by means of statistical analysis of accumulated data; 2) theoretical estimate of the upper limits; 3) realistic modeling of the induced electric field on the surface of the Earth and GIC by using 3D conductivity distribution of the Earth. Through these discussions, we will plot the scheme of the future collaboration among interdisciplinary scientists to study extremely large GICs in Japan.
|
| Type of presentation |
Oral and Poster presentation
|
| Invited papers |
ARAKI, Tohru (Kyoto University)
Uyeshima, Makoto(Earthquake Research Institute, University of Tokyo)
|