currently erupting or show signs of erupting in the near future

the height of a wave from the center of the top of the crest or the bottom of the trough

seismic waves that travel through the body of the planet. Primary or secondary waves.

a large crater caused by the violent explosion of a volcano that collapses into a depression

a small volcano built primarily of pyroclastic material ejected from a single vent

tall mountain with steep sides and wide base, made up of alternate layers of ash, cinder, and lava.

the highest point of a wave

A volcano that has not erupted for a long time, but may erupt again one day.

ground shaking caused by the release of energy stored in rocks

is a type of volcanic eruption in which lava steadily flows out of a volcano onto the ground

how earthquakes are generated. Stresses cause strain to build up in rocks they can no longer bend elastically and they break causing an earthquake.

a relatively gentle not explosive volcanic eruption

a potentially devastating eruption of rock lava ash and gas exploding from a volcano

if a volcano that has not erupted in recorded history and is unlikely to erupt again

a crack in the ground that may be the side of a volcanic eruption

the point where rocks rupture during an earthquake

a spring that throws forth intermittent jets of heated water and steam

a spring of naturally hot water, typically heated by subterranean volcanic activity.

a volcanic mudflow containing Ash Rock and water from melting snow rainfall that races down river valleys during an eruption

a dome-shaped plug a viscous lava that cools near the vent of a volcano

a flat area formed by the eruption of large amounts of fluid lava

The process by which an earthquake's violent movement suddenly turns loose soil into liquid mud

the region below a volcano where magma and gases collect

hot ash gas in rock that race down a volcano slopes during an eruption

the record of an earthquake's seismic waves produced by a seismograph

A device that records ground movements caused by seismic waves as they move through Earth

the study of seismic waves including earthquakes and the Earth's interior

devices that measure the amount of ground motion caused by an earthquake; also called seismographs

A low, flat, gently sloping volcano built from many flows of fluid, low-viscosity basaltic lava

extremely large scale volcano, massive pyroclastic flow, ash travels globe

seismic waves that travel along the Earth's surface

fragments of material produced in a volcanic eruption

Lowest point of a wave

an enormous wave generated by vertical movement of the ocean floor and underwater earthquakes, volcanic eruptions, landslides, or meteorite impacts.

the thickness of a liquids and its resistance to flow

the horizontal distance from wave Crest to wave Crest or wave trough to wave trough

On a seismogram, which waves arrive first, second, third, and last?

Which waves are the most destructive

Choose correct answers: What information is needed to calculate the distance from a seismic station to an earthquake’s epicenter?

What usually kills or injures people in an earthquake?

Which of the following describes the build up and release of stress during an earthquake?

How many seismograph stations are needed to locate the epicenter of an earthquake?

Earthquakes can occur with _________ faulting.

Approximately what percentage of earthquakes occur at plate boundaries?

In general, the most destructive earthquake waves are the __________ .

How do rock particles move during the passage of a P wave through the rock?

How do rock particles move during the passage of a S wave through the rock?

Which of the following observations may indicate a forthcoming destructive earthquake?

Which of the following statements best describes the state of earthquake prediction?

The property of a magma that determines whether or not it has high viscosity

After steam, the most abundant component of volcanic gases

Mount St. Helens, prior to its eruption in 1980 was an excellent example of:

The viscosity of magma is primarily controlled by:

Much of the upper part of the oceanic crust is composed of interconnected bulbous masses of igneous rock called:

Crater Lake in Oregon is an excellent example of a:

The largest volcano in the world (height, volume, or diameter) is:

For every lava flow that erupts from a volcano, what quantity of molten rock hardens beneath the surface?

The islands of Hawaii are: