Volcanoes erupt to release pressure built up in the magma chamber by expelling the magma as lava. Along with lava, a volcanic eruption releases ash and greenhouse gases such as sul...
When a volcano erupts, hot magma (molten rock), gases and volcanic ash are emitted. The explosiveness of the eruption depends on the consistency of the magma and the amount of pressure built up prior to eruption.
An eruption begins when pressure on a magma chamber forces magma up
through the conduit ... Volcanic activity is classified by how often a volcano erupts
Jan 5, 2015 ... The eruption of a volcano can be one of the planet's most destructive events —
spewing huge amounts of rock, gas and ash that can kill people.
Volcanic hazards and prediction. What happens during an volcanic eruption:
Types of volcanic eruptions are quite varied, dependent on the type of magma,
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
The friction causes earthquakes and volcanic eruptions near the edges of the
plates. The theory that ... When this happens, it commonly results in earthquakes.
Volcanic eruptions happen when lava and gas are discharged from a volcanic
vent. The most common consequences of this are population movements as
May 20, 2014 ... Of the five active volcanoes in Hawaii, only the Kilauea and Loihi volcanoes have
been quietly erupting consistently for decades. But Mauna ...
Volcanoes form when magma reaches the Earth's surface, causing eruptions of ...
Volcanic eruptions can happen at destructive and constructive boundaries, but ...