Fig. 4
Focal mechanism solutions with Quality A and B determined in this study. The depth of hypocenter is a 0–20 km, b 20–30 km, c 30–31 km, d 31–32 km, e 32–33 km, f 33–34 km, g 34–35 km, h 35–36 km, and i 36–45 km. All diagrams are equal area projections on the lower hemisphere of the focal sphere. Colored areas show compressional quadrants