What is a seismic wave and how is it similar to any other type of wave?

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Presentation transcript:

What is a seismic wave and how is it similar to any other type of wave?

What is a seismic wave? seis·mic wave : n; an earth vibration generated by an earthquake or explosion Collins English Dictionary – Complete and UnabridgedCollins English Dictionary – Complete and Unabridged © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003 Synonyms: earthquake, tremor, seismic activity

What is a seismic wave? (elastic) wave of energy traveling through the Earth from the epicenter of an earthquake waves that travel along or near the earth's surface are called Rayleigh and Love wavesRayleighLove waves that travel through the earth's interior are called P and S wavesPS recorded on seismographs wave

How is a seismic wave similar to any other type of wave?

Properties of Waves Wavelength Amplitude Period and frequency Crest Trough

Properties of Waves Wavelength: the distance from one peak, or crest, to the next (the same as the distance from one dip, or trough, to the next)

Properties of Waves Amplitude: equal to the height of the crest of the wave above the rest position (the same as the depth of a trough of a wave below the rest position)

Properties of Waves Period: the time between one crest and the next appearing (also true for troughs). Frequency: how many peaks go past in a given time, usually one second.

Properties of Waves Crest: maximum upward displacement from the rest position. Trough: maximum downward displacement from the rest position. Amplitude: maximum displacement from rest position; the distance from rest to crest/trough. Wavelength: length of one complete wave cycle. Period: time to make one complete cycle. (measured in units of time ) Frequency: how many peaks go past in a given time, usually one second. ml