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Abstract:
The recent sequence of devastating earthquakes in Turkey (February 6, 2023) coincided with the activation of the Râmnicu Sarat seismic zone in Romania. After the first 7.8 R earthquake in Central Turkey, 2023-02-06 01:17:36.1 UTC, a 4.6 R earthquake followed shortly in Romania, 2023-02-06 01:26:20.6 UTC. This magnitude activated the NIEP (National Institute of Earth Physics) seismic warning system. On 13.02.2023, the Targu Jiu area was reactivated with a 5.2R earthquake, 2023-02-13 14:58:07.4 UTC, and three aftershocks. Shortly after, an earthquake with magnitude 4R also occurred in Croatia, 2023-02-13 15:18:49.5 UTC. Are we witnessing an overlap of events in which earthquakes with a magnitude above 7R in Turkey have reactivated other seismic zones? Before these events, we recorded an anomaly in the temperature and level of the Black Sea by the monitoring stations in Mangalia and Constanta. An analysis of the level of the Black Sea and the Mediterranean Sea before and after the devastating earthquakes in Turkey does not indicate the production of a tsunami, although an alert of this type was generated in Italy, but it shows a movement of a large volume of water that can induce seismicity. The analysis of these overlapping events in a short period of time does not indicate a direct interdependence, but an indirect one is possible. The large displacements of the faults as a result of the devastating earthquakes in Turkey can push the Black Sea microplate and affect the Vrancea seismic zone characterized by deep earthquakes with large effects.
