Science ❯ Geology ❯ Volcanology

Eruption Dynamics

Pyroclastic Flows Ash Clouds Hazards Lava Flows Hazard Assessment Lava Flow Lava Fountains Magma Movement Ash Dispersion Ash Plumes Seismic Activity Tremor Activity Ash Plume Impact on Air Travel Ash Emissions Volcanic Ash Safety Concerns 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 Lava Characteristics Sakurajima Eruptions Strombolian Activity Safety Measures Volcanic Hazards Hazards of Volcanic Activity Pazifischer Feuerring Magma Activity

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