Fig. 13From: Difference of horizontal-to-vertical spectral ratios of observed earthquakes and microtremors and its application to S-wave velocity inversion based on the diffuse field conceptDirect comparison of the EHVRs of S-wave (red), the MHVRs for microtremors (blue), and the pEHVRs translated from MHVR by using the empirical EMR of Category 1 (black). We can see significant shift of amplitude toward EHVR. Red vertical lines are the fundamental peak frequencies usedBack to article page