Recent Studies of Chromospheric Spicules

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.