This topic contains a solution. Click here to go to the answer

Author Question: What is the difference between primary and secondary volcanic hazards? What will be an ideal ... (Read 140 times)

panfilo

  • Hero Member
  • *****
  • Posts: 572
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?



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

medine

  • Sr. Member
  • ****
  • Posts: 344
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.





medine

  • Sr. Member
  • ****
  • Posts: 344

 

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Did you know?

Excessive alcohol use costs the country approximately $235 billion every year.

Did you know?

Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

For a complete list of videos, visit our video library