Science ❯ Geology ❯ Volcanology

Eruption Dynamics

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

Guatemala Declares Orange Alert as Fuego Erupts with Lava, Pyroclastic Flows and Tall Ash Plumes

Officials say the next 24–72 hours are critical because accumulated hot debris and forecast rain could trigger dangerous lahars that threaten nearby communities.

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

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