Luminous Night Clouds

Abstract

ON the night of June 30-July 1 large masses of night clouds were seen over southern Norway, travelling with great velocity from east to west. Three of my aurora stations, Oslo, Kongsberg and Toemte, were in action, and a series of simultaneous photographs were taken from all three stations. By inspecting the plates, one gets the impression that the height was of the same order, about 80 km., as in 1932, but details can only be given when the plates are measured and calculated.