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| | Abstract | | In our previous study, we carried out microtremor array measurements at Takasu area in Kochi city on November 2010. We used two circular arrays with radii of 50 m and 100 m simultaneously, and we successfully detected dispersive characteristics of both Rayleigh-wave and Love-wave in a frequency range between 1.2 to 3.8 Hz. To make a better understanding about surface wave propagation characteristics in more broad-band frequency range, we additionally conducted smaller array measurements on March 2013, using 4 sets of three-component portable seismometers which compose a circular array with a radius varying from 50 m to 25 m and 12.5 m, respectively. Results from newly observed data are reported and discussed. |
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