What are the characteristics of a explosive volcano?

Explosive volcanoes are characterized by their violent eruptions, which are often driven by high-viscosity magma that traps gases. This buildup of pressure leads to explosive outbursts, ejecting ash, pumice, and volcanic gases high into the atmosphere. They typically form stratovolcanoes, which are steep-sided and layered due to alternating eruptions of lava flows and pyroclastic materials. Common examples include Mount St. Helens and Mount Vesuvius.