Fig. 7
From: Focal mechanisms and stress field in the Nobi fault area, central Japan
Spatial change in the direction of the σ 1-axis along the a 35.7° N and b 35.5° N lines of latitude. Shaded area in (b) shows the zone of rotation of the σ 1-axis. Rectangles and triangles indicate the direction in the layers with depths of 5–10 km and 8–13 km, respectively. (c) Focal mechanisms used for the stress inversion at (35.5° N, 136.3° E) and (35.5° N, 136.4° E). d Focal mechanisms used for the stress inversion at (35.5° N, 136.7° E) and (35.5° N, 136.8° E)