Fig. 1From: Spatial variation in coda Q in the northeastern part of Niigata–Kobe Tectonic Zone, central Japan: implication of the cause of a high strain rate zoneSpatial distribution of epicenters (circles) and stations (blue squares) used in this study. Red lines show Quaternary active faults (Active Fault Research Group 1991), and red triangles show Quaternary active volcanoes. In a lower-right panel, red lines show the Itoigawa–Shizuoka Tectonic Line (ISTL) and a gray zone shows the Niigata–Kobe Tectonic Zone (NKTZ)Back to article page