Fig. 8From: Sedimentation process of ashfall during a Vulcanian eruption as revealed by high-temporal-resolution grain size analysis and high-speed camera imagingComparison of GSDs obtained from high-speed camera imaging (top) and laser diffraction (bottom). The open column in the GSD indicates falling particles with inferred densities of < 1500 kg m−3. The vertical dashed lines indicates lower limit of particle diameter for the high-speed camera imagingBack to article page