Skip to main content

Main navigation

Center for Science Education

Contact Us

Home
About
Educators
Explore
Visit
Events
Support Our Mission

Search SciEd

Contact Us

Breadcrumb

Home
Image Gallery

How Big Was That Eruption? Check the Volcanic Explosivity Index!

Volcanic Explosivity Index (VEI)'s numeric scale measures the relative explosivity of historic eruptions.

*USGS*

How likely are you to recommend this page to a friend?

0

1

2

3

4

5

6

7

8

9

10

Not likely at all

Extremely likely

Leave this field blank

NSF NCAR

NSF NCAR Homepage
ACOM | Atmospheric Chemistry Observations & Modeling
CGD Laboratory
CISL | Computational & Information Systems
EdEC | Education, Engagement & Early-Career Development
EOL | Earth Observing Laboratory
HAO | High Altitude Observatory
MMM | Mesoscale & Microscale Meteorology
RAL | Research Applications Laboratory

UCAR

UCAR Homepage
Community Programs
Education & Training
For Staff
Government Relations & External Engagement
Member Institutions
Tech Transfer & Engagement
University Collaboration

Subscribe to Monthly K-12 News

Learn more about our monthly newsletters

Follow Us on Social Media!

Privacy
Cookies
Web Accessibility
Terms of Use
Copyright Issues
Sponsored by U.S. NSF
Report Ethics Concern
Staff Login

Postal Address: P.O. Box 3000, Boulder, CO 80307-3000 • Shipping Address: 3090 Center Green Drive, Boulder, CO 80301

This material is based upon work supported by the NSF National Center for Atmospheric Research, a major facility sponsored by the U.S. National Science Foundation and managed by the University Corporation for Atmospheric Research. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the U.S. National Science Foundation.