A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that
allows hot lava ... Erupting volcanoes can pose many hazards, not only in the
immediate vicinity of the .... Like ...
Volcanoes can remain inactive, or dormant, for hundreds or thousands of years
before erupting again. During this time they can become covered by vegetation ...
Volcanoes erupt because of density and pressure. The lower density of the
magma relative to the surrounding rocks causes it to rise (like air bubbles in
Most volcanoes occur in the basin of the Pacific Ocean, also known as the Ring
of Fire. ... Where do tsunamis mostly occur? ... When did Aconcagua last erupt?
May 26, 2016 ... Volcanic eruptions are driven by a combination of mechanisms, which include
pressure and heat in the Earth's mantle, as well as tectonic ...
Apr 10, 2015 ... Here are the countries most at risk of a deadly volcanic eruption, according ...
though the volcano did not erupt, according to historical accounts.
Volcanic eruptions occur only in certain places and do not occur randomly. This
is because the Earth's crust is broken into a series of slabs known as tectonic ...
Volcanic activity occurs at two types of plate boundaries: mid-ocean ridges and
subduction zones. At mid-ocean ridges, basaltic eruptions produce new sea-floor
Find out what the earth make-up is, and how extreme pressure build up inside
the earth forces molten matter to be expelled out to the surface, causing a
An extinct volcano is one which has erupted thousands of years ago and there's
no possibility of eruption. Why do volcanoes erupt? The Earth's crust is made up