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.
Data of southwestern Japan 1, 3, 9, Kanto district 4, and northern area of Izu island 10 are compiled.
Green areas denote the estimated asperities or locked zone on the Philippine Sea slab 7, 13, and expected source region of the Tokai, Tonankai, Nankai earthquakes 2, 15.
Blue areas denote the slow slip events 5, 6, 8, 11, 12.
Arrows indicate direction of plate motion of the Philippine Sea plate relative to the continental plate 14.
Red triangles denote active volcanoes.
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