Session outline
Multidisciplinary and Interdisciplinary(M)
Session Sub Category Intersection(IS)
Session ID M-IS29
Title Extremely severe geomagnetically induced currents in Japan
Short title Extremely severe GIC
Convener Name Shigeru Fujita
Affiliation Meteorological College, Japan Meteorological Agency
Co-convener 1. Name Ikuko Fujii
Affiliation Kakioka Magnetic Observatory, Japan Meteorological Agency
Co-convener 2. Name Ryuho Kataoka
Affiliation Tokyo Institute of Technology
Co-convener 3. Name Yusuke Ebihara
Affiliation Research Institute for Sustainable Humanosphere, Kyoto University
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)