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Earth, Planets and Space
Fig. 1 | Earth, Planets and Space

Fig. 1

From: Detailed S-wave velocity structure of sediment and crust off Sanriku, Japan by a new analysis method for distributed acoustic sensing data using a seafloor cable and seismic interferometry

Fig. 1

Location of the seafloor cable containing optical fibers in the off-Sanriku region, Japan. Location of the optical seafloor cable in the off-Sanriku region, Japan. The black line indicates the route of the seafloor cable installed by the Earthquake Research Institute, the University of Tokyo. White triangles the indicate centers of the subarrays for calculation of the CCFs. Blue triangles indicate the centers at the distances from the coast of 39.94 and 67.48 km for the data processing demonstrated in Fig. 2 and 3. The red line shows a span of the estimated 2-D velocity profile shown in Fig. 4. Due to large incoherent noise near the coast and offshore areas, the spatial range of the present data processing was limited from 28 to 75 km from the coast. White lines indicate the survey lines of Takahashi et al. (2004)

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