Memoirs of the Kakioka Magnetic Observatory Vol.17 No.01， p.19, January, 1977
Transfer Functions at Kakioka (Part II)- Reevaluation of Their Secular Changes
Shiraki, M. & Yanagihara, K,
Abstract
The secular change of the transfer functions at Kakioka, which was found by one of the present authors (Yanagihara 1972), has been reevaluated by the method of power spectrum analysis developed by Everett and Hyndman (1967). Fifty-three geomagnetic storms (one per year from 1917 to 1974 excluding five years) have been analysed by this method and the secular change of the transfer functions has been confirmed.
