Abstract
We proposed an efficient detection method of the peak frequencies of microtremor H/V spectral ratio by using a low-pass filter. It was revealed that the proposed method can detect the peak frequencies that are essentially important for the earthquake response of the ground. It was also revealed that the proposed method was more advantageous than the window processing in cases where the peak frequencies were low or the peak values of the H/V spectral ratio were relatively small. Applicability of the proposed method was further investigated using the microtremor H/V spectral ratios in the Kanto region.
