The location beneath the vent of a volcano where molten rock (magma) is stored prior to eruption. Also known as a magma storage zone ormagma reservoir
U.S. Geological Survey, U.S. Department of the Interior, Volcano Hazards Program, Glossary, Washington, DC, USA 2011. http://volcanoes.usgs.gov/vsc/glossary/alluvium.ht ml, (ND/ Volc Emr - Amer) {795}