Figure 1. In 2023 in southeastern Turkey, two quakes struck 9 hours and 100 kilometers apart — a magnitude 7.8 event followed by a magnitude 7.7 event. Active faults, 2023 surface ruptures, background shocks and aftershocks are shown together with Coulomb stress change. One sees that seismicity has largely shut down in the (blue) stress shadows, as there are more background shocks (pink) in those regions than aftershocks (black). Many, but not all, of the (red) stress trigger zones are filled by aftershocks (black). Credit: Temblor, CC BY-NC-ND 4.0

Figure 1. In 2023 in southeastern Turkey, two quakes struck 9 hours and 100 kilometers apart — a magnitude 7.8 event followed by a magnitude 7.7 event. Active faults, 2023 surface ruptures, background shocks and aftershocks are shown together with Coulomb stress change. One sees that seismicity has largely shut down in the (blue) stress shadows, as there are more background shocks (pink) in those regions than aftershocks (black). Many, but not all, of the (red) stress trigger zones are filled by aftershocks (black). Credit: Temblor, CC BY-NC-ND 4.0

Figure 1. In 2023 in southeastern Turkey, two quakes struck 9 hours and 100 kilometers apart — a magnitude 7.8 event followed by a magnitude 7.7 event. Active faults, 2023 surface ruptures, background shocks and aftershocks are shown together with Coulomb stress change. One sees that seismicity has largely shut down in the (blue) stress shadows, as there are more background shocks (pink) in those regions than aftershocks (black). Many, but not all, of the (red) stress trigger zones are filled by aftershocks (black). Credit: Temblor, CC BY-NC-ND 4.0