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| | Abstract | | We verified that the applicability of the miniature array analysis (r < 1 m) , by which we can identify the phase velocities of Rayleigh waves with wavelengths exceeding several tens or a hundred meters, depends on the intensity of the microtremors, based on actual data obtained at about 50 sites in Tsukuba City, Japan. The noises dominating the miniature array data are considered to be those generated within the observation system, so that the applicability of the miniature arrays depends on the microtremor intensity at a targeted site if the self-noise characteristics are unvaried. Therefore, one can assess the applicability of the miniature array analysis in advance, provided that (i) one uses an observation system with the self-noise characteristics unvaried, and that (ii) the microtremor intensity at the targeted site is known a priori. |
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