Translated to English from paper in Japanese, originally published in: Gijutsu Houkoku, Vol.41, No.2 (No.113), 23-31, 2002 with permission of authors.
Determining the Amount of Man-Induced Geomagnetic Disturbances
T. Tokumoto, S. Nakajima, T. Ookawa, M. Hoshino
Abstract
To grasp the amount of man-induced geomagnetic disturbances, observations must be made at some points to establish comparative geomagnetic observations before and after the occurrence of man-induced geomagnetic disturbances. A difference between measurements before and after the occurrence must be identified and defined as the amount of man-induced geomagnetic disturbances in which natural variation is not included. Problems to this method are that it requires a great deal of labor to analyze observational data and perform calculations and that the criteria for evaluating the results of calculations are not established yet. This paper describes the analysis software that we have developed to analyze the man-induced geomagnetic disturbances caused by a magnetic moment which is unchanged and fixed. If this software is used to process observational data, it is expected that the problems mentioned above will be resolved.
