Wide-angle seismic profiling across the middle Izu-Ogasawara Arc –KR07-13 cruise–

抄録

We carried out a wide-angle reflection and refraction experiment using 102 ocean bottom seismographs on a 679-km long seismic line crossing the middle Izu-Ogasawara Arc. The cruise was conducted by R/V Kairei of Japan Agency for Marine-Earth Science and Technology from September to October, 2007. The objectives of the cruise are to reveal the crustal and uppermantle structures across the middle Izu-Ogasawara Arc from Ogasawara Ridge to Shikoku Basin illuminating the structural variations associated with the arc evolution and back-arc openings. In this paper, we summarize the seismic experiment and show the acquired data of ocean bottom seismographs.