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Progress in Earth and Planetary Science
Fig. 4 | Progress in Earth and Planetary Science

Fig. 4

From: The nature of the Pacific plate as subduction inputs to the northeastern Japan arc and its implication for subduction zone processes

Fig. 4

a Pre-stack depth migration (PSDM) section along the northern part of line R2 (Fujie et al. 2016). PSDM was applied to the MCS reflection data obtained by hydrophone streamer cable, but the velocity model for PSDM was developed by traveltime inversion using OBS data. The Moho is relatively deeper and the basement is relatively shallower near the area of the pseudofault than in the adjacent area. The red arrow on the top shows the pseudofault, and the black shows the intersection with the line A3. b \(V_p/V_s\) ratio along the northern part of line R2 derived by the tomographic inversion of OBS data (Fujie et al. 2016); \(V_p/V_s\) is shown to be relatively high near the pseudofault. c A map around the survey line R2. The red line shows the survey line corresponding to a and b. Yellow dashed lines represent discontinuities of the magnetic anomaly lineations, and the western one is interpreted as a pseudofault (Nakanishi 2011)

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