Permalink : http://hdl.handle.net/2115/73386

JaLCDOI : 10.14943/gbhu.82.1

This study performs the diffusion-deposition simulation for volcanic ash following its forecast procedure by the Japanese Meteorological Agency, for the case of the volcanic eruption at Mt. Shinmoedake on 26 January 2011 and 18 February 2011. The volcanic ash with a smaller particle size was transported farther from the crater, so that most of ash fall in the foothill consisted of the smaller particles. In contrast, the large particles were mostly deposited around the crater, but it contributed to the mass amount of ash fall even in the foothill. Compared with ash fall observation, the simulation successfully reproduced the amount of ash fall for these cases.