Science ❯ Geology ❯ Volcanology

Eruption Dynamics

Ash Clouds Pyroclastic Flows Hazards Hazard Assessment Lava Fountains Magma Movement Ash Dispersion Lava Flows Seismic Activity Ash Plumes Tremor Activity Lava Flow Ash Plume Impact on Air Travel Ash Emissions Volcanic Ash Tourist Impact Impact Assessment Magma Behavior Ash Cloud Behavior Hazards of Eruptions Hazard Mitigation Fissure Eruptions Lava Emission Tremor Analysis Hazards Assessment Ash and Gas Emissions Tephra Composition Cinder Cones Sakurajima Eruptions Strombolian Activity Safety Measures Volcanic Hazards Hazards of Volcanic Activity Pazifischer Feuerring Magma Activity

Mount St. Helens, 46 Years Later, Is Quiet Under Watch

Expanded sensors give early warning that supports a continued green alert.

Kīlauea’s Latest Eruption Lofts Lava to New Heights, Prompts Rare Ashfall Warning

Kīlauea’s Latest Summit Eruption Sends 30,000-Foot Ash Plume, Triggers Park and Highway Closures

New Excavations Confirm Centuries-Long Settlement in Post-Vesuvius Pompeii Ruins

Second-Day Eruption of Mount Lewotobi Laki-Laki Grounds Flights, Blankets Villages

Mount Etna Eruption Sends Tourists Fleeing but Leaves Communities Unharmed