Figure 7. Multichannel seismic (MCS) record section across Japan Trench near JT-2G in an east west direction. The data is from the KH-90-1 cruise of ORI R/V Hakuho-maru. The location of the proposed observatories relative to the subduction geometry is shown. The strong reflector ~1.3 s below seafloor at the western edge continuing on east past the observatory site is interpreted to be Cretaceous basement. See Figure 6 for track line.