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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

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. 4

2-D Vs structure estimated from phase velocity information. 2-D Vs structure estimated from phase velocity information. The 2-D structure model consists of four units. Unit annotations are the average Vp/Vs value with errors. The errors were defined as double standard deviation during calculation of average. The white circles indicate the aftershocks off the Pacific coast of the Tohoku Earthquake determined by pop-up OBSs (Shinohara et al., 2012). The aftershocks within a box of 40 km in width on both sides along the fiber cable are projected onto this profile. Some aftershocks occurred in Unit4, whereas there was no seismicity observed in the sedimentary basin

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