Using the following sources, answer the questions below:

USGS What are volcano hazards?

USGS Photo Glossary of volcanic terms

USGS Poster

Youtube: USGS Mt St Helens Eruption, May 18, 1980

Google Earth

Mt. St Helens Eruption Images:

Dome collapse and pyroclastic flow at Unzen Volcano


1. What is the difference between risk, hazard and disaster. (Individual answer)

2. In groups of 2 or 3, complete one slide of this presentation.

  • Each slide should include a definition, a picture, and a named example.
  • As you present, groups will discuss one event when their feature occurred, and it’s human, environmental and economic consequences. (Do not put this on the slide)
You have 20 minutes.