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Home > Publication > Memoirs of the Kakioka Magnetic Observatory > Memoirs of the Kakioka Magnetic Observatory Vol.15 No.01 >Geomagnetic Solar Daily Variations at the Middle Latitude and the Day-to-day Variability of Equivalent Overhead Current System

Memoirs of the Kakioka Magnetic Observatory Vol.15 No.01, p.19, December, 1972


Geomagnetic Solar Daily Variations at the Middle Latitude and the Day-to-day Variability of Equivalent Overhead Current System


Shiraki, M.


Abstract

 During the IASY a continuous observation of geomagnetic field was carried out at Chichijima(27°06'N, 142°11'E; Geomagnetic 17.1°N). On this opportunity geomagnetic solar daily variations at the middle latitude stations in Japan were looked over again. General characteristics of the middle latitude part of the normal world-wide variation are seen in the results obtained here though some problems are still left.
  Day-to-day changes of horizontal intensity and declination were also examined for quiet days on which Sq variations were derived. And a very large day-to-day variability of equivalent overhead current system is shown both in the center of focus and in the intensity.



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