Figure 1From: The size range of bubbles that produce ash during explosive volcanic eruptionsCollection locations of ash samples. (a) The October 14, 1974 eruption of Volcán Fuego, Guatemala (modified from Rose et al. 2008); and (b) the May 18, 1980 eruption of Mount St. Helens, Washington, U.S.A (modified from Durant et al. 2009).Back to article page