Basic Volcano Terms
An opening in the Earth’s crust where lava, ash, and gases escape.
Volcano
A wide volcano with gentle slopes formed by runny lava.
Shield volcano
An eruption with short, violent lava explosions.
Strombolian eruption
A fast-moving mudflow of ash and water during rains.
Lahar
A geothermal plant that uses steam directly.
Dry Steam Power Plant
Molten rock beneath the Earth’s surface.
Magma
A volcano made of alternating layers of lava and ash.
Composite volcano
An eruption caused by water and magma interaction.
Phreatomagmatic eruption
A volcanic hazard that blanketed Central Luzon in 1991.
Ash fall
A Philippine province known for geothermal plants.
Albay/Leyte
Magma that reaches the Earth’s surface.
Lava
A small, steep volcano made of ash and cinders.
Cinder cone volcano
A very explosive eruption with tall ash columns.
Plinian eruption
A deadly hot cloud that rushed down Mayon Volcano slopes.
Pyroclastic flow
Energy taken from heat inside the Earth.
Geothermal Energy
The bowl-shaped opening at the top of a volcano.
Crater
A volcano that has erupted in recorded history.
Active volcano
An eruption caused by steam without new magma.
Phreatic eruption
The Philippine agency that monitors volcanoes.
PHIVOLCS
A geothermal plant where hot water flashes into steam.
Flash Steam Power Plant
A fast-moving flow of hot ash, gas, and rocks.
Pyroclastic flow
A large volcanic depression formed after a volcano collapses
Caldera
A gentle eruption with flowing lava, common in Hawaii.
Hawaiian eruption
Poisonous gases from a volcano that can suffocate humans and animals.
Volcanic gas
Geothermal energy is a type of this energy.
Renewable Energy