Curated OER
How Big are Volcanic Eruptions?
Students explore volcanic eruptions. For this science lesson, students discuss the Volcanic Explosivity Index. Students use information from the index to answer questions.
PBS
Nova: World's Deadliest Volcanoes According to the Volcanic Explosivity Index
Learn how scientists measure the size of a volcanic eruption. After viewing a recreation of the volcanic eruption of Mount St. Helens, you will be challenged to rate it using the volcanic explosivity index (VEI).