SOLAR PROMINENCE ACTIVITY, 1944 - 1954

Solar prominences appearing on surveys made at the High Altitude Observatory, Climax, Colorado, and at the Sacramento Peak Observatory, Sunspot, New Mexico, were measured for size and position and each prominence was classified according to the Menzel-Evans 1953 scheme of classification. The authors compare prominence activity to spot activity, and study the distribution of the various classes with respect to solar latitude. During this period 93 per cent of the areas were in A-type prominences and 20 per cent were in S types. The hedgerow AN family of prominences is much the largest class the spicules BNs, the smallest. The activity of all classes except the spicules was greatest near spot maximum in 1947 and lowest almost two years before spot minimum in 1954. Up to and including 1947, southern areas predominated, and northern areas thereafter.