High density single-channel seismic profiles obtained during KY05-06 cruise in the Sagami Bay, Japan

Abstract

In May, 2005, intensive single channel seismic surveys have been successfully completed in Sagami Bay area, central Japan, during the KY05-06 cruise using R/V KAIYO of JAMSTEC (Japan Agency for Marine-Earth Science and Technology). We obtained 22 SCS profiles in the overall Sagami Bay area, and 37 shallow and deep profiles around the Hatsushima cold seep communities in the western Sagami Bay. Very clear acoustic images were captured down to 1 sec. (TWT) after some editing, band-pass filtering and time migration. We present here the seismic profiles obtained during the KY05-06 cruise.

Challenge for multifaceted data acquisition around active volcanoes using uncrewed surface vessel

“…Backscatter of light of 700 nm wave length (bbp (700) ) values were lower than 0.01 m -1 or under detection limit on the way to and north of Nishinoshima (Figure 13A). This is typical value in the open ocean in the western Pacific subtropical area (e.g., Fujiki, 2019;Taketani, 2021;Kitamura, 2022). However, backscatter increased largely east side of Nishinoshima (Figure 13B).…”

High quality multi-frequency seismic profiles obtained during KY06-01 cruise in the Sagami Bay, Japan

“…During the KY05-06 cruise, we already conducted a single-channel seismic (SCS) survey in the overall Sagami Bay area in order to obtain a series of high-quality, dense seismic profiles (Kinoshita et al, 2005). This study, as a continuation of KY05-06 survey, attempts to obtain both the shallower and deeper extrapolation of some seismic lines using SCS with a cluster gun and Multi-Channel Seismic (MCS) survey with two GI guns, respectively.…”