Measuring Earthquakes

11 terms by cocopuffporky

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Chapter 2;Section 2

Focus

The point beneath Earth's surface where rock breaks under stress and causes an earthquake

Epicenter

The point on Earth's surface directly above an earthquake's force

Seismic Waves

A vibration that travels through Earth carrying the energy released during and earthquake

P waves

A type of seismic wave that compresses and expands the ground

S waves

A type of seismic wave that moves the ground up and down or side to side

Surface waves

A type of seismic wave that forms when P-waves and
S-waves reach Earth's surface

Seismograph

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

Magnitude

The measurement of an earthquake's strength based on seismic waves and movement along faults

Mercalli Scale

A scale that rates earthquakes according to theri intensity and howmuch damage they cause

Richter Scale

A scale that rates seismic waves as measured by a particular type of mechanical seismicgraph

Moment Magnitude
Scale

A scale that rates earthquakes by estimating the total energy released by an earthquake

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