Figure F4. Map of the forearc region with drilled sites. DSDP Leg 56 Sites 434-436; Leg 57 Sites 438, 440, and 441; and Leg 87 Site 548 and ODP Leg 186 Sites 1150 and 1151. Site 1150 is in a seismically active zone and Site 1151 is in an aseismic zone.