Earthquake

vibrations in the earth caused by the sudden release of energy, usually as a result of the movement of rocks along a fault

• earthquake

• epicenter

• focus

• surface waves

an earthquake wave that follows the main shock of an earthquake

• earthquake

• S Wave

• aftershock

• P Wave

an earthquake wave that travels through the body of the earth rather than on its surface

• surface wave

• body wave

• aftershock

• focus

the location where the rupture of an earthquake begins and energy is released

• epicenter

• focus

• seismogram

• energy release center

a scientist who studies earthquakes

• seimology

• seismologist

• seismogram

• seismograph

an instrument that detects, records, and measures the vibrations produced by an earthquake

• seismology

• seismologist

• seismogram

• seismograph

the record made by a seismograph; the paper on which earthquake waves are recorded

• seismology

• seismologist

• seismograph

• seismogram

the measurement of the total amount of energy released at the focus of an earthquake (measured by Richter Scale)

• intensity

• magnitude

• greatness

• epicenter

the primary earthquake wave that travels through the body of the earth; first to reach the seismograph station

• surface wave

• aftershock

• P Wave

• S Wave

the time between the arrival of P Waves and S Waves at a location where an earthquake occurs

• time-distance graph

• seismograph station

• lag time

• focus