Figure F7. Map of Japan Trench area with seismicity (R. Hino, pers. comm., 1998). The locations of proposed Sites 1150 and 1151 are shown. Focal depth symbols: open circle = 0-10 km; open square = 10-20 km; open triangle = 20-30 km; solid circle = 30-40 km; solid square = 40-50 km; solid triangle = >50 km.