EQnotes - Earthquakes Seismology study of earthquakes, and...

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Earthquakes Seismology – study of earthquakes, and of energy that moves through the earth Earthquake – sudden movement of the earth. Occurs along a fault Fault – break in the earth along which movement occurs Focus – location (underground) where an earthquake begins. Reported as latitude, longitude, and depth. Epicenter – location of an earthquake, directly above the focus Elastic rebound – after a major earthquake stresses may be reset in an area Stress – force applied to a rock Shear Compressive Extensional/Tensile Strain – deformation as a result of stress Elastic Plastic Brittle Failure Seismometer (or seismograph) – instrument that records seismic waves Seismic waves – waves of energy that move through the earth Body waves P waves S waves Surface waves Rayleigh waves Love waves P, S waves are used to help locate earthquakes and find out how large an earthquake is
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Locating an earthquake 1. For a single seismic station, determine times of P, S wave arrivals. 2. Subtract arrival times to determine P-S time interval.
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EQnotes - Earthquakes Seismology study of earthquakes, and...

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