Mount St Helens, 1980 to Now-What's Going On? TDO Directions: After reading the article "Mt St Helens, 1980 to Now-What's Going On?" answer the
following questions on a separate paper. Be sure restate the questions and use evidence from the text
to support your answer whenever possible.
1. What resulted from the 1980 eruption of Mt St Helens?
2. Why do you think that only 8% of the sediment deposited from the 1980's eruption has been
eroded away in the decades since then?
3. What are the lingering hazards from the eruptions in the 1980's and early 2000's?
4. Why does Mt St Helens and other Cascade volcanoes exist?
5. Why is water the "surprise ingredient in the magma generating process"?
6. How can water aid in the eruption process?
7. What causes ground deformation? Why is it an important feature to monitor?
8. How does a change in the composition or amount of gasses released form the magma indicate
an impending eruption?
9. What features or geologic processes do scientists watch for when monitoring or predicting
eruptions?
10. Create a timeline of the eruptions of Mt St Helens starting with May 18, 1980 eruption.