Fig. 2

Distribution of the Luding Mw 6.6 earthquake sequence and focal mechanism solutions. DEM map based on the publicly available Shuttle Radar Topography Mission data with 90 m resolution. The aftershock sequence of the Luding earthquake is from reference23; focal mechanism solutions in red and black represent the mainshock of the Luding earthquake and the two M > 5 aftershocks, respectively23; the focal mechanism solutions in purple represent seven (7) Ms ≥ 3.0 aftershocks of the Luding earthquake14 (same below). The focal mechanism solution is the lower hemisphere projection. The blue line indicates the position of eight representative depth profiles of earthquake clusters in Fig. 4. DDHF: Daduhe fault; MXS: Moxi segment of the Xianshuihe Fault Zone. Figures and maps were generated using QGIS 3.32.1 (https://download.qgis.org/downloads/) and CorelDRAW Standard 2024 (https://www.coreldraw.com/en/product/coreldraw/standard/).