| 11. | However, large earthquakes may generate Rayleigh waves that travel around the Earth several times before dissipating.
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| 12. | Note that these Rayleigh waves have a much higher frequency than Rayleigh waves generated by earthquakes.
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| 13. | The existence of Rayleigh waves was predicted in 1885 by Lord Rayleigh, after whom they were named.
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| 14. | Rayleigh waves are generated from seismic sources described to be active, passive, or a combination of both.
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| 15. | Increasing l concentrates fundamental branch closer to surface and at large l this tends to Rayleigh waves.
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| 16. | Rayleigh waves propagating at high ultrasonic frequencies ( 10-1000 MHz ) are used widely in different electronic devices.
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| 17. | In addition to Rayleigh waves, some other types of surface acoustic waves ( SAW ), e . g.
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| 18. | However, if a solid or structure has a density or sound velocity that varies with depth, Rayleigh waves become dispersive.
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| 19. | They usually travel slightly faster than Rayleigh waves, about 90 % of the body wave velocity, and have the largest amplitude.
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| 20. | Rayleigh waves have a speed slightly less than shear waves by a factor dependent on the elastic constants of the material.
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