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Author Question: What is the difference between primary and secondary volcanic hazards? What will be an ideal ... (Read 161 times)

panfilo

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on: Jul 15, 2018
What is the difference between primary and secondary volcanic hazards? What will be an ideal response?

Question 2

What is VEI? What will be an ideal response?


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medine

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Reply #1 on: Jul 15, 2018
Answer to Question 1

Primary volcanic hazards are those related directly to the exit of magma from an erupting vent and the
distribution of volcanic materials across the surrounding countryside. These include hazards related to
lava flows, volcanic gases, ash and pumice falls, and PDCs. Secondary hazards are not from direct
discharge of material from a vent, but are from later effects of eruptions. These include tsunami, lahars
(volcanic debris flows), long-term volcanic degassing, and severe weather conditions



Answer to Question 2

VEI stands for Volcanic Explosivity Index. It has values that range from 0 to 10 and is based on the
volume of material ejected, the height that the material rises, whether volcanic gases and ash penetrate
the stratosphere and how long the eruption lasts.



panfilo

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Reply #2 on: Jul 15, 2018
Correct answers!


medine

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Reply #3 on: Jul 15, 2018
Great! Please up vote :D


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