What is a non-explosive eruption?

An explosive eruption is a volcanic term to describe a violent, explosive type of eruption. Mount St. Helens in 1980 was an example. Such eruptions result when sufficient gas has dissolved under pressure within a viscous magma such that expelled lava violently froths into volcanic ash when pressure is suddenly lowered at the vent. read more

Non-explosive Eruptions A second type of volcanic eruption is a non-explosive or effusive eruption (Figure 8.11). Because the composition of magma is different in different volcanoes, the properties of the lava are different. read more

Mount Saint Helens explosive eruption on July 22, 1980 An explosive eruption is a volcanic term to describe a violent, explosive type of eruption. Mount St. Helens in 1980 is an example. read more