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Philippine Sea plate

Philippine Sea plate unified based on the velocity structures by seismic tomography, seismicity, focal mechanisms, seismic reflection and refraction survey, receiver function analysis.

Figure 1. Depth contour map of the upper boundary of the Philippine Sea slab. PDF

Data of southwestern Japan1, 3, 9, Kanto district4, and northern area of Izu island10 are compiled. Green areas denote the estimated asperities or locked zone on the Philippine Sea slab7, 13, and expected source region of the Tokai, Tonankai, Nankai earthquakes2, 15. Blue areas denote the slow slip events5, 6, 8, 11, 12. Arrows indicate direction of plate motion of the Philippine Sea plate relative to the continental plate14. Red triangles denote active volcanoes.

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