Fig. 1.
From: Seismicity and crustal structure in the vicinity of the southern Itoigawa-Shizuoka Tectonic Line
Map of the Itoigawa-Shizuoka Tectonic Line (ISTL) as a boundary splitting the Honshu Island into NE and SW parts. The black solid lines represent surface traces of the various segments of the ISTL and the Median Tectonic Line (MTL)—Ito: Itoigawa city; Hak: Hakuba village; Mat: Matsumoto city; Suw: Lake Suwa; Kof: Kofu city; Shi: Shizuoka city; Tokyo: Tokyo metropolitan area; NFM: Northern Fossa Magna rift basin; CUZ: Central Uplift Zone; EUP: Eurasia plate; PSP: Philippine Sea plate; Izu-Bonin Arc: Northern tip of the Izu-Bonin Arc volcanic front.