Answer:
Eruptions of Mount Rainier usually produce much less volcanic
ash than do eruptions at Mount St. Helens. However, owing to the
volcano's great height and widespread cover of snow and glacier
ice, eruption-triggered debris flows at Mount Rainier are likely
to be much larger -- and will travel a greater distance -- than
those at Mount St. Helens in 1980. Furthermore, areas at risk
from debris flows from Mount Rainier are more densely populated
than similar areas around Mount St. Helens.
