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Fig. 3 | Earth, Planets and Space

Fig. 3

From: Normal-faulting stress state associated with low differential stress in an overriding plate in northeast Japan prior to the 2011 Mw 9.0 Tohoku earthquake

Fig. 3

Misfit angles of the 12 highlighted earthquakes in Fig. 1 for crustal stresses around Iwaki City prior to the 2011 Tohoku earthquake. Red and blue bars indicate the misfit angles for stresses A and B, respectively. A stress with a misfit angle less than 30° (shaded region) is considered compatible with a focal mechanism determination (Gephart and Forsyth 1984; Michael 1991). Triangles indicate earthquakes compatible with either stress regime A (red triangles) or stress regime B (blue triangles) based on the approach of Otsubo et al. (2008, 2013). This approach ensures a robust result when based on the misfits of only four earthquakes

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