Recent Studies of Chromospheric Spicules

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Abstract
Five spicule film sequences taken on different dates in Ha were studied. Maximum heights of spicules ranged downward from 20,000 km. Lifetimes ranged from the film limit of 0· 3 min to about 30 min. Distributions of maximum heights and lifetimes indicated the occurrence of numerous small, short-lived spicules that were not resolved in these films.