A volcano is a location where magma, or hot melted
rock from within a planet, reaches the surface. It may happen violently, in a
massive supersonic explosion, or more quietly, as a sticky, slow lava flow.
Volcanoes have been a part of earth's history long before humans. Compare the
history of human beings, a few million years in the making, to that of the
Earth, over four billion years in the making.
The study of volcanoes, or Volcanology,
includes many odd terms. How many of these do you know?
Volcanic Places in the USA
Listed below are two places in the United
States that are considered "active" volcanic areas.
Mount St Helens
On May 18, 1980, after a long period of rest, this quiet
mountain in Washington provided detailed
observations on the mechanics of highly explosive eruptions.
This field seismometer measures earthquakes associated with
subsurface volcanic forces and may help to predict future events. It sits on a
plateau known as the "Volcanic Tableland" formed by a major corruption 600,000