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| | Abstract | | We investigated the applicability of seismic interferometry to daylong microtremor data with theoretical consideration, suggesting that the accuracy of velocity measurements are related to wavenumber and interstation distance by examining spatial response of the cross correlation function. To understand applicability of seismic interferometry to short-term microtremor data collected in small spacing we conducted microtremor observation and applied seismic interferometry. The cross correlation functions with daylong microtremor data implies the emergence of signal below to low period compared with previous studies on seismic interferometry. However, appropriate velocity was estimated only within the range suggested by theoretical consideration. These results suggest that the applicability of seismic interferometry could be described by wavenumber and interstation distance. |
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