Figure 4. (a) Map view of aftershocks in the first week, shown as blue circles. The red line traces the rupture of the magnitude-7.8 event, and the green line traces the rupture of the magnitude-7.5 event. (b) The cumulative number of magnitude-4.5 or larger aftershocks from the ANSS aftershock catalog for the Turkey sequence follows a typical “Omori” (1/time) frequency decay. In other words, the number of shocks in the first day is about the same as in the next 10 days, and in the next 100 days after that. But the overall numbers for the 2023 sequence are low, particularly considering that the combined seismic moment (or total energy release) of the two mainshocks is equivalent to a single magnitude-7.9 event.