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~N- <br />o goo ~ ~ <br />gar <br />Wavelength = 2 x 925 n. <br />=1850 n. <br />~ _ Velocity <br />F Wavelength <br />x 8000 fVc <br />teso n <br />Figure 2 - M example of-a potential natural rescmarxe that can produce ground motion <br />at the cliff face with amplitudes greater than that predicted by propagation in a <br />homogeneow half=space. Wave-guide and resonance phenomena, as well as focusing of <br />acoustic energy, are site specific. <br />