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Earth, Planets and Space
Fig. 3 | Earth, Planets and Space

Fig. 3

From: RETRACTED ARTICLE: Recovery process of shear wave velocities of volcanic soil in central Mashiki Town after the 2016 Kumamoto earthquake revealed by intermittent measurements of microtremor

Fig. 3

Comparison of the monitored microtremor H/V spectral ratios after the foreshock at TMP03. Black lines (see a–k and m–p) indicate the H/V spectral ratios measured on December 6, 2016; red lines (see a–k and m–p) indicate the spectra measured on April 15, April 16, April 17, April 23, May 3, May 5, May 14, May 19, May 22, June 4, August 20, September 13, October 9 and November 6, 2016, respectively; blue line (see l) indicates the spectrum measured on July 28, 2016, during the PS logging tests by Yoshimi et al. (2016; 2017); light blue line (see l) indicates the theoretical H/V spectral ratio based on the results of the PS logging tests at GS-MSK-1 nearby TMP03 (see center and right panels in Fig. 2)

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