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Plate Tectonics

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An instrument used to measure the magnitude of earthquakes
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Describes the amount of seismic energy released during an earthquake.
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A small earthquake in underground caverns and mines that are caused by seismic waves produced from the explosion of rock on the surface
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'sleeping' volcano, can become active again in the future.
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A result of movements within the earth's crust
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Dissolved gases in magma builds up until it explodes, erupting gases, steam, and magma with incredible force.
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The type of earthquake that occurs when the earth's crust breaks due to geological forces on rocks and adjoining plates that cause physical and chemical changes
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Valleys created when convergent plates meet
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Magma oozes quietly from the vent of the volcano
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An earthquake that occurs after a previous earthquake
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The type of earthquake that is the result of the detonation of a nuclear and/or chemical device
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Major volcanic belt formed by the many volcanoes that rim the Pacific Ocean.
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volcano that is unlikely to erupt again.
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Ridges created when convergent plates meet
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A weak spot in the Earth's crust where magma comes to the surface.
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The theory that Earths's outer shell is divided into several plates
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An instrument that measures and records details of earthquakes
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A volcano that is erupting or shows signs of erupting.
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What happens when Convergent plates meet, forming upfolds and downfolds
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The type of earthquake that results from tectonic forces which occur in conjunction with volcanic activity