Memoirs of the Kakioka Magnetic Observatory Vol.13 No.02， p.73, March, 1970
On the relation between the Solar Flare Effects and associated Geomagnetic Storms
Nagai, M.
Abstract
It has been suggested that the occurrence of a solar flare effect (sfe) in the magnetogram is an indication that the flare is capable of producing a magnetic storm which will usually follow within the 2 or 3 days.
In here，evidence is examined which suggests that either there is no increase of magnetic activity due to a sfe or that the increase is a significant event. A statistical investigation of the connection between sfe and magnetic storm in this present analysis gives positive result in some 32% of sfe which shows increase of magnetic activity within the 4days，a gainst two studies of D. Van Sabben (1953) and R. A. Wattson (1957).
