Faults
This is the idea that the Earth's crust is made up of moving plates.
What is the theory of plate tectonics?
This is caused by a hot spot or by heated magma rising to the surface.
This measures, detects and times movements of the Earth.
What is a seismograph?
A danger of volcanoes that occurs when part of the mountain collapses, causing mud and rock fragments to surge down the mountain.
What is a debris flow?
The strength of the seismic waves of an earthquake.
What is the magnitude?
This fault occurs when rocks move apart, forming a gap.
What is a normal fault?
A volcano that is expected to erupt again within the next five years.
These are vibrations of energy that flow from the focus of an earthquake.
What are seismic waves?
Magma that breaks through the Earth's surface.
What is lava?
This is another name for the crust of the Earth.
What is the lithosphere?
This fault occurs when rocks push together, forcing a section of rock upward.
What is a reverse/thrust fault?
This large, gradually sloping volcano has mild eruptions and a continuous flow of lava.
What is an active shield volcano?
What is the Richter scale?
Volcanic fog is also called this name.
What is vog?
These are slower, destructive waves that occur on the surface of the Earth.
What are surface waves?
This can be caused by molten rock moving under a volcano, the buildup of energy when two surface plates move against each other or when large amounts of Earth are removed or added.
What is an earthquake?
A volcano that is presently inactive.
What is a dormant volcano?
This is the point on the Earth's surface directly above the focus of an earthquake.
What is the epicenter?
How the magma travels from the magma chamber up to the crater.
What is a vent?
This occurs in places where water is heated by hot magma.
What are hot springs?
This fault occurs when rocks move horizontally past each other.
What is a strike-slip fault?
This volcano has a bowl-like crater at its top and only one main vent.
What is a cinder-cone volcano?
These are fast moving waves that occur beneath the surface of the Earth.
What are body waves?
An avalanche-like emission of red-hot dust and gases from a volcanic eruption.
What is a pyroclastic flow?
This is the name for an area of the Pacific Ocean where many volcanoes occur.
What is the Ring of Fire?