At the fault-perpendicular Tevekkelli Trench T1, excavated across the southwestern part of the Pazarcık segment of the East Anatolian Fault, Yönlü and Karabacak (2023:5,6) identified Event Y as a large-magnitude surface-rupturing earthquake. The trench exposed a prominent shear zone displaying dominant strike-slip movement within a narrow fault zone. Yönlü and Karabacak (2023:6) associated Event Y with the 1513 CE Marash Earthquake. This correlation is based on two radiocarbon samples: one from the undeformed post-faulting topsoil, which yielded a calibrated age of 1515–1845 CE ( 2σ), and another from the highest faulted unit (unit j), which yielded a calibrated age of 1430–1680 CE (2σ).

These ages constrain Event Y to 1430-1845 CE and are consistent with the timing of the 1513 CE Marash earthquake. Notably, Yönlü and Karabacak (2023) did not identify a similarly dated event in either of the Balkar trenches, suggesting that the rupture associated with Event Y may have been confined to the Tevekkelli subsegment or that its expression was not preserved at the Balkar site. Yönlü and Karabacak (2023:10) further suggested that the 1513 CE Marash earthquake terminated "to the NE by the Kartal restraining bend."

Figure 6b - Trench Log of NE wall of Tevekkelli trench - Thin black lines are stratigraphic contacts - colours show units - red lines are traces of faults - small rounded outlines are gravels - (trench location 322 045 m E/4 147107 m N) - Yönlü and Karabacak (2023)