Some fundamental questions about the evolution of the Sea of Japan back-arc

Anne Van Horne, University of Wyoming, Department of Geology and Geophysics, Laramie, WY, United States; Earthquake Research Institute, The University of Toyko, Tokyo, Japan, Hiroshi Sato, University of Tokyo, Bunkyo-ku, Japan and Tatsuya Ishiyama, Earthquake Research Institute, University of Tokyo, Tokyo, Japan