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Earth, Planets and Space
Fig. 5 | Earth, Planets and Space

Fig. 5

From: Origin of the seismic belt in the San-in district, southwest Japan, inferred from the seismic velocity structure of the lower crust

Fig. 5

a P-wave velocity perturbations at a depth of 25 km. Velocity perturbations are deviations from the initial velocity. Gray dots denote epicenters of intraplate earthquakes of MJ ≥ 1.0 and depths ≤ 20 km that occurred between January 2001 and December 2016. b Distribution of D90. Colors represent the depth of the D90

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