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Morphological Studies on Sudden Commencements of Magnetic Storms Using Rapid-run Magnetograms (Including Studies on Sudden Impulses) ( II )
After the investigations of the horizontal disturbance vector changes in high latitudes using the rapid-run magnetograms during the IGY, their six idealized basic types are proposed in this paper. According to these idealized types, a new classification of ssc's in high latitudes is carried out and local time occurrence dependences of each type are shown in details. The results are compared with ones by many other workers pointing out some defects in the latters. As regards ssc's in low and middle latitudes, they are studied in the same manner as for high latitudes and a few important differences concerning the morphology of ssc's between high and low and middle latitudes are made clearer.
On the other hand, magnetic sudden impulses in high latitudes are examined in respect to the same point as for ssc's in high latitudes. And it is concluded that ssc's and si's belong to the same kind of magnetic impulsive disturbances because their morphology shows in general very pronounced similarity.
Finally,on the basis of various interpretations of ssc's and si's by other workers, the present author proposes a possible model of some hydromagnetic interpretation of these phenomena to explain the present results satisfactorily.
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