High‐Precision Aftershock Distribution Highlights the Complex Fault Geometry of the 2024 M w 7.5 Noto Peninsula Earthquake

Abstract We deployed 30 temporary seismic stations around the source region of the 2024 M w 7.5 Noto Peninsula earthquake to investigate the relationship between mainshock rupture and fault geometry. Using machine learning techniques, we detected and precisely located 46,252 aftershocks, revealing several fault planes corresponding to active faults ruptured during the mainshock. Two subparallel landward‐dipping planar structures were identified near the mainshock hypocenter, converging westward to the Wajima‐Oki segment. This geometry suggests that complex rupture episodes near the hypocenter resulted from successive ruptures on adjacent fault planes rather than slip on a single plane. At the western edge of the 2024 rupture area, aftershocks extend close to but rarely occur on the fault that ruptured during the 2007 M w 6.7 earthquake, suggesting that the 2024 earthquake did not re‐rupture the same faults of the 2007 earthquake.