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Earth, Planets and Space
Fig. 13 | Earth, Planets and Space

Fig. 13

From: Seismotectonics of the 2018 northern Osaka M6.1 earthquake and its aftershocks: joint movements on strike-slip and reverse faults in inland Japan

Fig. 13

PT-axes of the aftershock focal mechanisms and the inverted stress field in the northern Osaka area. Polar plots in a–d show PT-axes of the aftershocks, and decomposed major and minor DC MTs of the mainshock (see bottom left legend and text). e Result of the local stress field inversion by Michael (1984)’s method with illustrated uncertainty (see bottom right legend and text). f Histogram of the shape ratio \(R = \frac{{\sigma_{2} - \sigma_{1} }}{{\sigma_{3} - \sigma_{1} }}\). g Histogram of misfit angles for the data with respect to the best stress field solution. The misfit angle is defined as an angle between the tangential traction predicted by the best stress field solution and the observed slip direction

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