Zona Târgu Jiu, considerată neseismică, reactivată de cutremurele și miile de replici înregistrate într-un an

In 2023, a series of earthquakes in the Târgu Jiu area revealed the reactivation of old tectonic structures in a region previously considered seismically inactive. A study indicates that the main quakes originated from about 20 kilometers deep, leading to over 4,400 recorded aftershocks. The seismic activity, which began with a 4.9 magnitude quake followed by a 5.4 magnitude quake, has been well-documented, showing a progressive migration of activity to shallower depths. The study highlights the need for detailed seismic source characterization, even in areas with limited historical seismicity, as moderate quakes can indicate complex underlying processes. The role of fluids in weakening faults remains a hypothesis requiring further investigation.