On Cumulus clouds appeared on the days of the Great Earthquake

Abstract

On Examining photographs taken at Tatikawa, 35km apart from. Tokyo to the west, the author obtained the height of cumulus heads and the velocity of their ascent. The maximum and average height of cumulus produced by the fire of Yokohama was respectively 10850m and 5850m and that of Tokyo was 6560m and 5150m. The velocity of ascent of the heads ranged from 0.6 to 2.0m/s and 1.1m/s on the average for Tokyo and 0.9m/s for Yokohama. See Pl. 7 & 8.