Potential hazards from Colima volcano, Mexico

Abstract

Colima volcano, Mexico's most active volcano, is presently in an explosive phase of its cyclic activity. An analysis of Colima's eruptive history indicates that eruptions with pyroclastic falls and flows are probable in the near future. A hazard map for Colima volcano was prepared, based on geologic studies, historical documents on its activity, analysis of the geomorphology and socio-economic considerations. The areas threatened by pyroclastic flows, secondary lahars, avalanches and lavas are mainly to the south, whereas the direction of maximum fall would be mostly to the north and east although south-westerly winds may also carry ash in that direction. Power and water supply, roads, air traffic and communications could be seriously affected by an eruption of Colima volcano.