EARTH SCIENCE SERVICES > ENVIRONMENTAL ADVISORIES > GEOLOGICAL ADVISORIES > VOLCANIC ACTIVITY
Activity pertaining to a vent in the surface of the Earth through which magma
and associated gases and ash erupt.
A Volcanic Activity Advisory may include reports on erupting volcanoes,
seismic/GPS information that may predict a pending eruption, and volcanic ash.
Jackson, Julia A. (1997) Glossary of Geology, 4th Edition. Alexandria,
VA:American Geological Institute, 769 p.