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Particle Types
Volcano
World - Tephra
View a slide show with color photos and descriptions about tephra.
Site also includes a sample lesson plan, outline of key concepts,
references, and activities about tephra.
Ash,
Tephra, Pumice, Scoria, etc. -
USGS Cascades Volcano Observatory
Read a series of fact sheets to investigate further different
types of volcanic particles. See a picture of a bear foot-print
in volcanic ash.
Distribution and Hazards of Volcanic Ash
Volcanic
Air Pollution - A Hazard in Hawaii
Hawaii serves as a good case study to demonstrate how the hazard
of volcanic particles can spread over a wide range.
Volcanic
Ash - Danger to Aircraft in the Northern Pacific
In 1989-1990, a series of eruptions of Redoubt Volcano in Alaska
threatened airplane traffic throughout northern North America.
Site includes several examples of the dangers volcanic eruptions
can have on airplanes, even if the airplane is hundreds or thousands
of miles from the volcano.
Volcanic Explosivity Index
The
Volcanic Explosivity Index
Learn more about the classification system volcanologists use
to study volcanic eruptions.
To stimulate the eruption of one of the three
volcanoes,
visit the following web site.
Volcanic
Ash Forecast Transport and Dispersion
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