Causes
A small burst of shaking that occurs before a large earthquake.
What is a foreshock.
The movement of Earth's crust resulting from the release of built-up potential energy between two stuck lithospheric plates.
What is an earthquake.
A scale that rates the damage experienced by buildings, the ground, and people during an earthquake.
What is a Modified Mercalli Scale.
Underground melted rock.
What is magma.
A pool of lava that has formed in a caldera.
What is a lava lake.
A point on Earth's surface right above the focus of an earthquake.
What is the epicenter.
An instrument that measures and records seismic waves.
What is a seismograph.
A scale that rates the total energy released by earthquakes.
What is a moment magnitude scale.
Magma that has reached and cooled on Earth's surface.
What is lava.
A mound in the vent of an erupted volcano.
What is a resurgent dome.
A small tremor that follows an earthquake.
What is an aftershock.
Seismic wave that reach and travel along Earth's surface.
What are surface waves.
A scale that ranks earthquakes according to the size of the seismic waves.
What is the Richter scale.
An erupting vent through which molten rock and other materials reach Earth's surface, or a mountain built from the products of an eruption.
What is a volcano.
A volcano that is not erupting now, but that may erupt in the future.
What is a dormant volcano.
A region on Earth's surface that is broken and where movement occurs.
What is fault.
Seismic waves that travel through the interior of the Earth.
What are body waves.
The name of an earthquake where there is total destruction.
What is a catastrophic earthquake.
A location where magma collects inside Earth.
What is the magma chamber.
Solid remains of magma that filled the conduit of an extinct volcano. The neck is exposed as the volcano erodes.
What is a volcanic neck.
The point below Earth's surface where a rock breaks or slips and causes an earthquake.
What is the focus.
This caused all the seismographs in Camaroon to go off?
This is how the largest earthquake magnitude on the Richter scale.
What is 9 or greater.
A bowl shaped depression formed by the collapse of a volcano after it has erupted.
What is a caldera.
A volcano that is erupting or that has erupted recently.
What is an active volcano.