12 Facts About Seismic waves

Seismic waves wave is a wave of acoustic energy that travels through the Earth.

Seismic waves are studied by seismologists, who record the waves using seismometers, hydrophones, or accelerometers.

Seismic waves are distinguished from seismic noise, which is persistent low-amplitude vibration arising from a variety of natural and anthropogenic sources.

In geophysics, the refraction or reflection of seismic waves is used for research into Earth's internal structure.

Primary Seismic waves are compressional Seismic waves that are longitudinal in nature.

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The existence of these Seismic waves was predicted by John William Strutt, Lord Rayleigh, in 1885.

Love Seismic waves are horizontally polarized shear Seismic waves, existing only in the presence of a semi-infinite medium overlain by an upper layer of finite thickness.

Amplitudes of Stoneley Seismic waves have their maximum values at the boundary between the two contacting media and decay exponentially towards the depth of each of them.

The equation for Stoneley Seismic waves was first given by Dr Robert Stoneley, Emeritus Professor of Seismology, Cambridge.

Since shear Seismic waves cannot pass through liquids, this phenomenon was original evidence for the now well-established observation that the Earth has a liquid outer core, as demonstrated by Richard Dixon Oldham.

At teleseismic distances, the first arriving P waves have necessarily travelled deep into the mantle, and perhaps have even refracted into the outer core of the planet, before travelling back up to the Earth's surface where the seismographic stations are located.

Since P Seismic waves move at many kilometers per second, being off on travel-time calculation by even a half second can mean an error of many kilometers in terms of distance.