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Earth, Planets and Space
Fig. 8 | Earth, Planets and Space

Fig. 8

From: Azimuthal differences and changes in strain rate and stress of the Japanese Islands deduced from geophysical data

Fig. 8

Comparison between the azimuths of the maximum contraction of geodetic strain rate \({\tau }_{\mathrm{Hmax}}\) (blue arrows) and the maximum compressive stress \({S}_{\mathrm{Hmax}}\) (orange arrows) before and after the 2011 off the Pacific coast of Tohoku earthquake (during 2005–2011 in Phase 1 and during 2016–2019 in Phase 3) for the Hokkaido and Tohoku regions. The green circles represent the grid points where the azimuths differ by more than 60°. (1) and (2) show areas of characteristic results. The red triangle shows the Usu volcano. The focal spheres in the left figure are the global centroid moment tensor solution (Ekström et al. 2012) of the 1993 Hokkaido Nansei-oki earthquake and the 2003 Tokachi-oki earthquake, and that in the right figure is the 2011 off the Pacific coast of Tohoku earthquake

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