The strongest tremor reached a magnitude of 4.0, while the remaining events ranged between 2.6 and 3.8 ln the Richter scale. All six earthquakes occurred at an approximate focal depth of 8.1 kilometers.

Authorities assessed the events at Disaster Risk Level 0, meaning they pose no natural disaster risk and caused no reported damage.

The monitoring centre confirmed that it was continuing to observe seismic developments in the area and would provide updates if necessary.

Quang Ngai province, located in Vietnam’s central region, has experienced intermittent low-to-moderate seismic activity over the past decade. Although Vietnam is not situated along a major tectonic plate boundary, certain inland areas contain minor fault systems capable of generating small earthquakes.

In addition, experts have noted that some seismic activity in central Vietnam may be associated with reservoir-induced seismicity, a phenomenon in which fluctuations in water levels at large hydropower reservoirs can alter underground pressure conditions and trigger minor tremors.

Seismic clusters have previously been observed in areas near hydropower facilities in central Vietnam, including regions bordering Quang Ngai and neighbouring provinces. Most recorded earthquakes in recent years have ranged from low to moderate magnitudes and have not resulted in significant structural damage. These events are typically shallow, occurring at depths of less than 10 kilometres, and often take place in short-lived sequences.

Vietnam has strengthened its earthquake monitoring capacity in response to these developments. The Vietnam Academy of Science and Technology has expanded its seismic station network, enhanced real-time data analysis systems, and coordinated closely with local authorities to ensure timely public communication. Scientific agencies continue to conduct research on fault structures and reservoir impacts in order to better understand seismic patterns in central Vietnam.

Authorities emphasised that the February 21 earthquakes in Quảng Ngãi remain within expected levels for the region and currently present no threat to public safety. Residents are encouraged to follow official updates while remaining calm, as ongoing monitoring indicates no abnormal escalation in seismic risk.

4.8-magnitude earthquake strikes Laos, tremors felt in Hanoi

VOV.VN - Local people in Hanoi, Vietnam, felt tremors after a 4.8-magnitude earthquake jolted Houaphan province, Laos, late on November 12.