Japan Geoscience Union Meeting 2014

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Poster

Symbol M (Multidisciplinary and Interdisciplinary) » M-IS Intersection

[M-IS28_1PO1] Extremely severe geomagnetically induced currents in Japan

Thu. May 1, 2014 6:15 PM - 7:30 PM Poster (3F)

Convener:*Fujita Shigeru(Meteorological College, Japan Meteorological Agency), Ryuho Kataoka(National Institute of Polar Research), Ikuko Fujii Ikuko(Kakioka Magnetic Observatory, Japan Meteorological Agency), Shinichi Watari(National Institute of Information and Communications Technology)

6:15 PM - 7:30 PM

[MIS28-P01] Analysis of geomagnetically induced current measured in Japan

*Shinichi WATARI1 (1.National Institute of Informaton and Communications Technology)

Keywords:Geomagnetically Induced Current, geomagnetic storm, earth current, power grids, space weather

It is known that there is a possibility of failure of power grids caused by geomagnetically induced currents associated with intense geomagnetic storms. It is believed that effect of GIC is small in Japan because Japan locates low geomagnetic latitude comparing with its geographical latitude. Damage of transformer is reported from the Republic of South Africa associated with the October, 2003 storm. The Republic of South Africa locates in similar geomagnetic latitude with that of Japan. We made GIC measurements of a transformer of the Memanbetsu substation between 2005 and 2007. Those data are compared with geoelectric data observed by the Memanbetsu geomagnetic observatory of Japan Meteorological Agency. We estimated GICs associated with past intense geomagnetic storms using the geoelectric field data based on the result of the comparison. The result of our analysis will be reported.