Figure F1. Location map of seismic station coverage in the northwest Pacific. Solid circles mark the location of land seismic stations, whereas open circles mark current and proposed seafloor borehole observatories. The shaded circle marks the location of Hachijojima (HCH), a planned seismic station. YSS =Yuzhno Sakhalinsk, Russia; NMR = Nemuro, Japan; PHN = Pohang, Korea; OGS = Chichijima, Japan; MCSJ = Minami-torishima, Japan; ISG = Ishigakijima, Japan; TGY = Tagaytay, Philippines; PATS = Ponphei, Micronesia; PMG = Port Moresby, Papua New Guinea.