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Transverse
horizontal motion, perpendicular to the direction of propagation and
generally parallel to the Earth’s surface.
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VL
~ 2.0 - 4.4 km/s in the Earth depending on frequency of the
propagating wave, and therefore the depth of penetration of the waves. In general, the Love waves travel
slightly faster than the Rayleigh waves.
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Love
waves exist because of the Earth’s surface. They are largest at the
surface and decrease in amplitude with depth. Love waves are
dispersive, that is, the wave velocity is dependent on frequency, generally
with low frequencies propagating at higher velocity. Depth of
penetration of the Love waves is also dependent on frequency, with lower
frequencies penetrating to greater depth.
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