GEOLOGY

Detailed explanation-1: -Geologists classify volcanic eruptions as quiet or explosive. The properties of magma determine how a volcano erupts. Whether an eruption is quiet or explosive depends on the magma’s silica content and whether the magma is thin and runny or thick and sticky.

Detailed explanation-2: -A volcano’s explosiveness depends on the composition of the magma (molten rock) and how readily gas can escape from it. As magma rises and pressure is released, gas bubbles (mainly of water vapor and carbon dioxide) form and expand rapidly, causing explosions.

Detailed explanation-3: -The six eruption types are in order from least explosive to the most explosive; Icelandic, Hawaiian, Strombolian, Vulcanian, Pelean, and Plinian.