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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: Spatio-temporal characteristics of frictional properties on the subducting Pacific Plate off the east of Tohoku district, Japan estimated from stress drops of small earthquakes

Fig. 4

Spatially smoothed stress drop derived from (a) P-wave and (b) S-wave analyses, the same as Fig. 3. Thin contours show coseismic displacements of the following M7-8 large earthquakes for the 1968 Tokachi-oki, the 1978 Miyagi-oki, the 1981 Miyagi-oki, the 1989 Sanriku-oki, and the 2003 Miyagi-oki at an interval of 0.5 m (Nagai et al. 2001; Yamanaka and Kikuchi 2004). Areas A and B, corresponding to areas where repeating earthquakes have been observed (Uchida et al. 2007; Okuda and Ide 2018), have higher values of stress drop. Refer to the text in detail

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