Proceedings of the 12th International INQUA meeting on paleoseismology, active tectonic and archaeoseismology

316 PATA Days 2024 that deep lower magnitude earthquakes are able to produce surface ruptures (Jackson et al., 2002; Trifonov, 1986). Aseismic slip along the West Caspian Fault is also plausible given the overpressure, tectonic compression and high pore- fluid pressures demonstrated by the active mud volcanism. Our trenches do not rule out continuous creep deformation, but the sedimentation and structure suggest punctuated fault movement in discrete events. Nevertheless, the lack of historical records of earthquakes in this region could be explained by either low magnitude or creep events. Fig. 5: Event evidence and trench log of Trench 1 and 2.