Memoirs of the Kakioka Magnetic Observatory Vol.27 (March 1999)
角村悟,外谷健,石井美樹,手島聡
日本の地磁気観測データを用いた磁気嵐の研究
Tsunomura, S., Toya, T., Ishii, Y. & Teshima, S. A study of geomagnetic storm on the basis of magnetic observations in the Japanese chain observatories