Figure 7. 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, closed circle = 30-40 km, closed square = 40-50 km, closed triangle = 50+ km.