the point below the earth’s surface where the rock breaks or slips
Foucus
What is underground melted rocks
magma
region of the earth’s plate boundaries where oceanic crust is subduction under other plates, this is called ?
Ring of Fire
a point on earth’s surface right above the focus
Epicenter
the bowl shaped depression formed by the collapse of a volcano after it has erupted
Caldera
a point on earth’s surface right above the focus , is called ?
Epicenter
an instrument that measures and records seismic waves.
Seismograph
solid remains of magma that filled the conduit (pipeline) of an extinct volcano. The neck is exposed as the volcano erodes
Volcanic neck
What type of volcano is this?
Shield volcano
- flat top
Slow rising sides
a scale that ranks earthquakes according to the size of the seismic waves
Richter scale
What is it called when there is a mudflow that results from a volcanic eruption ?
Lahar
What is this type volcano?
Cinder cone volcano
a small burst of shaking that occurs before a large earthquake.
Foreshock
What is an erupting vent through which molten rock and other materials reach earth’s surface, or a mountain built from the products of an eruption
Volcano
What type of volcano is this?
A composite volcano