File:Volcanic ash grain size distributions.jpg

Summary
Volcanic ash grain size distributions from different volcanoes: Shinmoe-dake, Japan, 2001 (Andesite); Soufriere Hills, Montserrat, 2009 (Andesite); Chaiten, Chile, 2008 (Rhyolite); Ruapehu, New Zealand, 1996 (Basaltic-Andesite)