Analysis of Engineering and Geological Conditions of International Submarine Optical Fiber Cable Routing in the East China Sea Section

Figure 21

Side-scan sonar images showing a large number of gravels and hard strata outcropping in the area of the trench and the accompanying abyssal hills/seamounts in the Okinawa Trough (the left image is a side-scan image of gravels, and the right image is a side-scan image of hard strata outcropping).