2019 年 19 巻 3 号 p. 3_1-3_21
This study presents the relation between the estimated P-wave attenuation characteristics across the active fault line and the stress state characteristics of the fault for the 12 major active faults in Japan. We employed a twofold spectral ratio method to estimate the attenuation characteristics of the active faults. As a result of a review of the differences in the attenuation characteristics, a clear positive correlation with the ratio of the lapse time from the previous earthquake was confirmed. These results suggest that the attenuation characteristics estimated in this study may reflect the stress state of the active fault.
