Source characteristics of the aftershocks of the Wenchuan and Lushan earthquake sequences in the Longmen-Shan fault zone

After the occurrence of 2008 Wenchuan M w 7.9 earthquake, Longmen-Shan fault zone exhibits highly active seismicity. In years between and 2022, successive moderate magnitude aftershocks followed in region. this study, we used high-quality seismic data from National Earthquake Data Center China to estimate source parameters 184 events ( 3.9–6.2) Fault zone. The dataset comprised two sequences that occurred area, including earthquake sequence 2013 Lushan sequence. They have been classified according their focal mechanism. First, our results suggested values apparent stress varied approximately 0.1–11 MPa, which are higher than global average. strike-slip earthquakes highest average among types earthquakes. above indicate moderately high levels energy release region could result ground shaking potential. This behavior may be associated with accumulation strong deformation characteristics intraplate environment drop vary 0.24–39 MPa appear show a slightly increasing trend moment. level is mean value earthquakes, while typical Second, investigate radiated enhancement factor (REEF) quantify complexities. REEF 1.2 7.1, most consistent expectations based on Brune ω -square model. There exist differences complexity within model an unreliable some events. observation suggests availability different will help us assess hazard predict potential area.