QuestionJune 2, 2025

Multiple Choice 1 point Which of the following are differences between an eruption column and pyroclastic flow? Tephra in an eruption column stays hotter until it reaches the ground. A pyroclastic flow forms when the gas flux cannot support the column. A pyroclastic flow rises higher into the atmosphere than an eruption column. Damage from an eruption column is more restricted than a pyroclastic flow.

Multiple Choice 1 point Which of the following are differences between an eruption column and pyroclastic flow? Tephra in an eruption column stays hotter until it reaches the ground. A pyroclastic flow forms when the gas flux cannot support the column. A pyroclastic flow rises higher into the atmosphere than an eruption column. Damage from an eruption column is more restricted than a pyroclastic flow.
Multiple Choice 1 point Which of the following are differences between an eruption column and pyroclastic flow? Tephra in an eruption column stays hotter until it reaches the ground. A pyroclastic flow forms when the gas flux cannot support the column. A pyroclastic flow rises higher into the atmosphere than an eruption column. Damage from an eruption column is more restricted than a pyroclastic flow.

Solution
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Answer

A pyroclastic flow forms when the gas flux cannot support the column. ### Damage from an eruption column is more restricted than a pyroclastic flow. Explanation 1. Identify characteristics of eruption columns Eruption columns are vertical plumes of tephra and gas that rise into the atmosphere. They can cool as they ascend. 2. Identify characteristics of pyroclastic flows Pyroclastic flows are fast-moving currents of hot gas and volcanic matter that move along the ground, forming when the column collapses due to insufficient gas flux. 3. Compare height and damage potential Eruption columns generally rise higher than pyroclastic flows. Damage from pyroclastic flows is more widespread due to their ground-hugging nature and speed.

Explanation

1. Identify characteristics of eruption columns<br /> Eruption columns are vertical plumes of tephra and gas that rise into the atmosphere. They can cool as they ascend.<br /><br />2. Identify characteristics of pyroclastic flows<br /> Pyroclastic flows are fast-moving currents of hot gas and volcanic matter that move along the ground, forming when the column collapses due to insufficient gas flux.<br /><br />3. Compare height and damage potential<br /> Eruption columns generally rise higher than pyroclastic flows. Damage from pyroclastic flows is more widespread due to their ground-hugging nature and speed.
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