Figure F1. Location map of seismic station coverage in the northwest Pacific. At least five major plates with consuming boundaries interact in the northwest Pacific, causing subduction, backarc opening, slab collisions, terrane accretion, and island arc development. Blue and yellow circles = land seismic stations: TJN = Taejon, South Korea; INU = Inuyama, Japan; ISG = Ishigakijima, Japan; OGS = Chichijima, Japan; MCSJ = Minami Torishima, Japan; BAG = Baguio, Philippines; PATS = Pohnpei, Micronesia; JAY = Jayapura, Indonesia; PMG = Port Moresby, Papua New Guinea. Orange circles = International Ocean Network (ION) seafloor observatories: JT-1 and JT-2 (Japan Trench), WP-2 (northwest Pacific), and Site 1201 (this site). OHP = Ocean Hemisphere Project, IRIS = Incorporated Research Institutions for Seismology.

Figure F1. Location map of seismic station coverage in the northwest Pacific. At least five major plates with consuming boundaries interact in the northwest Pacific, causing subduction, backarc opening, slab collisions, terrane accretion, and island arc development. Blue and yellow circles = land seismic stations: TJN = Taejon, South Korea; INU = Inuyama, Japan; ISG = Ishigakijima, Japan; OGS = Chichijima, Japan; MCSJ = Minami Torishima, Japan; BAG = Baguio, Philippines; PATS = Pohnpei, Micronesia; JAY = Jayapura, Indonesia; PMG = Port Moresby, Papua New Guinea. Orange circles = International Ocean Network (ION) seafloor observatories: JT-1 and JT-2 (Japan Trench), WP-2 (northwest Pacific), and Site 1201 (this site). OHP = Ocean Hemisphere Project, IRIS = Incorporated Research Institutions for Seismology.