Image Source: GMS infrared & visible, from Sawada (1994), altered.
Date: July 29th, 1988

Comments: An excellent example of albedo differences between water clouds and ash clouds; note, however, the loss of some of the effect by the second image time.

References: Smithsonian Institution Global Volcanism Program reports, Sawada, Y, 1994, 'Tracking of Regional Volcanic Ash Clouds by Geostationary Meteorological Satellite', in 'Volcanic Ash and Aviation Safety: Proceedings of the First International Symposium on Volcanic Ash and Aviation Safety', edited by Thomas J. Casdevall, U.S. Geological Survey Bulletin 2047.