Why Some Volcanoes Flow and Others Explode

At one volcano, glowing lava pours from a vent and moves across the ground. At another, a column of ash climbs into the sky as gas and shattered rock burst outward. Inside this episode: - Eruptions Form A Spectrum - Viscosity Means Resistance To Flow - Silica Builds Networks - Gas Is Dissolved Deep Below - A Runny Magma Can Release Gas Sources include the references linked below. Sources and further reading: - [U.S. Geological Survey, Eruption Styles](https://volcanoes.usgs.gov/volcanic_ash/eruption_styles.html) - [U.S. Geological Survey, How Do Volcanoes Erupt?](https://www.usgs.gov/faqs/how-do-volcanoes-erupt) This episode explains general earth science and is not current volcano, hazard, evacuation, or emergency guidance. Follow local authorities and official observatories for present conditions. Follow Volcanoes Explained for another clear journey through how Earth builds and erupts.