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What
is Volcanic Ash?
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 Volcanic
ash consists of tiny jagged pieces of rock and glass. Ash is hard,
abrasive, mildly corrosive, conducts electricity when wet, and does not
dissolve in water. Ash is spread over broad areas by wind.
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What is it
like during ash fall?
 Falling ash can turn
daylight into complete darkness. Accompanied by rain and lightning, the
gritty ash can lead to power outages, prevent communications, and
disorient people.
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Guidance for
homes, business, & communities?
 Taking action
before, during, and after an ash fall can prevent or reduce many of the
damaging effects of ash. Removing ash requires disposal sites and
coordination among individuals and households, community organizations,
and businesses.
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| Requests from users
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If you have requests, or can help with these
requests, please
email the ASH Web Team using the link below
- What is the best frequency for radio
communication during
ash fall?
- Are there pre-collected sources of fresh
volcanic ash for use in experiments?
- Has anyone detected (or not) beryllium in ash
from the 1980 Mount St.
Helens eruption?
- Does GPS still work underneath a volcanic ash
cloud? ie. can GPS be used to navigate in the darkness?
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