How do you know when a volcano erupts?


According to the UCSB Geology Department, a volcanic eruption is defined as a volcanic event resulting in the emission of gases, lava, ash or other material from a volcano. These can manifest as a single eruptive pulse, an eruptive phase or an eruptive episode.

Eruptive pulses are a one-time emission, lasting a few seconds to a few minutes. Eruptive phases are eruptions that continue for a few hours or days, switching between ash and lava expulsion. Eruptive episodes are several connected eruptive phases over the course of several days, months or years. In a single eruption, the style, strength and ejected material may change hour by hour.

Q&A Related to "How do you know when a volcano erupts?"
The volcano science project is a classic that has been recreated each generation. The student typically builds a papier mâché model of a volcanic mountain. The student
Very broad question! Basically when a plate gets subducted under another the rock turns to molten rock and consequently becomes less dense. As the material is less dense it rises
when to plate move away from each other a volcano forms. that causes a volcano to change wich changes land and continets and volcanos when a plate changes a volcanoe forms. wich volcanos
it erupt because plates move apart and the magma in the core comes to the vent.
1 Additional Answer Answer for: how a volcano erupts
How to Make a Volcano Erupt
A volcano model made of dough or clay that erupts with a mixture of vinegar and baking soda is a entertaining and educational science activity for kids. Even preschool-age children love to watch the erupting "lava" bubbling out of the volcano's top. The... More »
Difficulty: Moderate
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