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During an explosive eruption, a volcano sends out superheated ash, gas, and rock. Depending on the nature of the eruption, pyroclastic flows can develop in three ways:
A lateral blast directly ejects the flow, though this is a rather rare event. In another scenario, dense pyroclastic material erupts and spills out of the vent or over the crater rim. In still other cases a vertical eruption column collapses and material flows downhill.
In all cases the flow involves a mass of ash, rock, and gas that is too dense to rise on its own, and instead hugs the ground.
Most pyroclastic flows are produced during explosive eruptions of stratovolcanoes.
What else can I help you with?
Does a pyroclastic flow typically occur during a quiet or loud eruption?
Pyroclastic flow typically occurs during a violent eruption.
What kind of eruption has an pyroclastic flow?
An explosive volcanic eruption. Pyroclastic flow is a mixture of fast flowing hot gases that travel down and away from the eruption.
What are differences between an eruption column and pyroclastic flow?
An eruption column is a vertical column of ash and volcanic gases rising above a volcano during an explosive eruption, while a pyroclastic flow is a fast-moving avalanche of hot rock fragments and volcanic gases that flows down the sides of a volcano at high speed. Eruption columns are visible in the sky, while pyroclastic flows move rapidly along the ground, causing devastation in their path.
What do you call the fast-travelling stream of hot gas and fragmental material that is produced during an explosive volcanic eruption?
Pyroclastic flow
Was eyjafjallajokull a lahar or a pyroclastic flow?
Neither. It is a volcano that famously erupted in 2010. The eruption produced pyroclastic flows.
What type of eruption does mount saint helens have?
a pyroclastic flow
What kind of type of lava does a Pelean eruption have?
A pyroclastic eruption, involving a viscous magma, typically of rhyolitic or andesitic type. An ignimbrite is the deposit of a pyroclastic density current, or pyroclastic flow.
What are the similarities in a lava flow and a pyroclastic flow?
A lava flow is simply a flow of liquid rock down a slope that usually results from an effusive eruption. A pyroclastic flow is an avalanche-like flow of hot ash, rock and gas that moves down a volcano during an explosive eruption, The move much faster than lava flows and are far more dangerous.
Does a pyroclastic flow typically occurs during an quite eruption?
No. A "quiet" eruption will produce lava flows. Pyroclastic flows generally result from explosive eruptions.
Is it true that pyroclastic flow typically occurs during a quiet eruption?
No. Pyroclastic flows are characteristic of explosive eruptions.
When does a pyroclastic flow happen after or before the eruption?
A pyroclastic flow typically happens during or after an eruption. It occurs when a volcano releases a fast-moving mixture of hot gas and volcanic materials, such as ash and rock fragments, that flow down the slopes of the volcano at high speeds. Pyroclastic flows are extremely dangerous and can cause significant destruction in their path.
Can non explosive volcanoes have pyroclastic flows?
The answer is Explosive . It is explosive because during a explosive eruption there are clouds of ash, gas , and rock , and with a pyroclastic flow there is dust and ash . there for the answer must be explosive .
